From b73b93a2af3392b9b7b8ba7e818ee767499f9655 Mon Sep 17 00:00:00 2001 From: Mircea Caprioru Date: Mon, 2 Sep 2019 16:08:28 +0300 Subject: [PATCH 01/41] iio: adc: ad7192: Add sysfs ABI documentation Add initial ABI documentation for ad7192 adc sysfs interfaces. Signed-off-by: Mircea Caprioru Signed-off-by: Jonathan Cameron --- .../ABI/testing/sysfs-bus-iio-adc-ad7192 | 15 +++++++++++++++ 1 file changed, 15 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-bus-iio-adc-ad7192 diff --git a/Documentation/ABI/testing/sysfs-bus-iio-adc-ad7192 b/Documentation/ABI/testing/sysfs-bus-iio-adc-ad7192 new file mode 100644 index 000000000000..74a2873045bf --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-iio-adc-ad7192 @@ -0,0 +1,15 @@ +What: /sys/bus/iio/devices/iio:deviceX/ac_excitation_en +KernelVersion: +Contact: linux-iio@vger.kernel.org +Description: + Reading gives the state of AC excitation. + Writing '1' enables AC excitation. + +What: /sys/bus/iio/devices/iio:deviceX/bridge_switch_en +KernelVersion: +Contact: linux-iio@vger.kernel.org +Description: + This bridge switch is used to disconnect it when there is a + need to minimize the system current consumption. + Reading gives the state of the bridge switch. + Writing '1' enables the bridge switch. From c88c8cd8265a9c7c2bf57350ab9c64d89c7b596b Mon Sep 17 00:00:00 2001 From: Mircea Caprioru Date: Mon, 2 Sep 2019 16:08:29 +0300 Subject: [PATCH 02/41] iio: adc: ad_sigma_delta: Export ad_sd_calibrate This patch exports the ad_sd_calibrate function in order to be able to call it from outside ad_sigma_delta. There are cases where the option to calibrate one channel at a time is necessary (ex. system calibration for zero scale and full scale). Signed-off-by: Mircea Caprioru Signed-off-by: Jonathan Cameron --- drivers/iio/adc/ad_sigma_delta.c | 3 ++- include/linux/iio/adc/ad_sigma_delta.h | 2 ++ 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/iio/adc/ad_sigma_delta.c b/drivers/iio/adc/ad_sigma_delta.c index 2640b75fb774..8ba90486c787 100644 --- a/drivers/iio/adc/ad_sigma_delta.c +++ b/drivers/iio/adc/ad_sigma_delta.c @@ -205,7 +205,7 @@ int ad_sd_reset(struct ad_sigma_delta *sigma_delta, } EXPORT_SYMBOL_GPL(ad_sd_reset); -static int ad_sd_calibrate(struct ad_sigma_delta *sigma_delta, +int ad_sd_calibrate(struct ad_sigma_delta *sigma_delta, unsigned int mode, unsigned int channel) { int ret; @@ -242,6 +242,7 @@ out: return ret; } +EXPORT_SYMBOL_GPL(ad_sd_calibrate); /** * ad_sd_calibrate_all() - Performs channel calibration diff --git a/include/linux/iio/adc/ad_sigma_delta.h b/include/linux/iio/adc/ad_sigma_delta.h index 7716fa0c9fce..8a4e25a7080c 100644 --- a/include/linux/iio/adc/ad_sigma_delta.h +++ b/include/linux/iio/adc/ad_sigma_delta.h @@ -119,6 +119,8 @@ int ad_sd_reset(struct ad_sigma_delta *sigma_delta, int ad_sigma_delta_single_conversion(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, int *val); +int ad_sd_calibrate(struct ad_sigma_delta *sigma_delta, + unsigned int mode, unsigned int channel); int ad_sd_calibrate_all(struct ad_sigma_delta *sigma_delta, const struct ad_sd_calib_data *cd, unsigned int n); int ad_sd_init(struct ad_sigma_delta *sigma_delta, struct iio_dev *indio_dev, From 42776c14c69224a75c781852ae4ca9a4811fd075 Mon Sep 17 00:00:00 2001 From: Mircea Caprioru Date: Mon, 2 Sep 2019 16:08:30 +0300 Subject: [PATCH 03/41] staging: iio: adc: ad7192: Add system calibration support This patch will add a system calibration attribute for each channel. Using this option the user will have the ability to calibrate each channel for zero scale and full scale. It uses the iio_chan_spec_ext_info and IIO_ENUM to implement the functionality. Signed-off-by: Mircea Caprioru Signed-off-by: Jonathan Cameron --- .../ABI/testing/sysfs-bus-iio-adc-ad7192 | 24 ++++++ drivers/staging/iio/adc/ad7192.c | 79 ++++++++++++++++++- 2 files changed, 102 insertions(+), 1 deletion(-) diff --git a/Documentation/ABI/testing/sysfs-bus-iio-adc-ad7192 b/Documentation/ABI/testing/sysfs-bus-iio-adc-ad7192 index 74a2873045bf..7627d3be08f5 100644 --- a/Documentation/ABI/testing/sysfs-bus-iio-adc-ad7192 +++ b/Documentation/ABI/testing/sysfs-bus-iio-adc-ad7192 @@ -13,3 +13,27 @@ Description: need to minimize the system current consumption. Reading gives the state of the bridge switch. Writing '1' enables the bridge switch. + +What: /sys/bus/iio/devices/iio:deviceX/in_voltagex_sys_calibration +KernelVersion: +Contact: linux-iio@vger.kernel.org +Description: + Initiates the system calibration procedure. This is done on a + single channel at a time. Write '1' to start the calibration. + +What: /sys/bus/iio/devices/iio:deviceX/in_voltagex_sys_calibration_mode_available +KernelVersion: +Contact: linux-iio@vger.kernel.org +Description: + Reading returns a list with the possible calibration modes. + There are two available options: + "zero_scale" - calibrate to zero scale + "full_scale" - calibrate to full scale + +What: /sys/bus/iio/devices/iio:deviceX/in_voltagex_sys_calibration_mode +KernelVersion: +Contact: linux-iio@vger.kernel.org +Description: + Sets up the calibration mode used in the system calibration + procedure. Reading returns the current calibration mode. + Writing sets the system calibration mode. diff --git a/drivers/staging/iio/adc/ad7192.c b/drivers/staging/iio/adc/ad7192.c index e6b660489165..bf3e2a9cc07f 100644 --- a/drivers/staging/iio/adc/ad7192.c +++ b/drivers/staging/iio/adc/ad7192.c @@ -155,6 +155,11 @@ * The DOUT/RDY output must also be wired to an interrupt capable GPIO. */ +enum { + AD7192_SYSCALIB_ZERO_SCALE, + AD7192_SYSCALIB_FULL_SCALE, +}; + struct ad7192_state { struct regulator *avdd; struct regulator *dvdd; @@ -169,10 +174,80 @@ struct ad7192_state { u8 devid; u8 clock_sel; struct mutex lock; /* protect sensor state */ + u8 syscalib_mode[8]; struct ad_sigma_delta sd; }; +static const char * const ad7192_syscalib_modes[] = { + [AD7192_SYSCALIB_ZERO_SCALE] = "zero_scale", + [AD7192_SYSCALIB_FULL_SCALE] = "full_scale", +}; + +static int ad7192_set_syscalib_mode(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + unsigned int mode) +{ + struct ad7192_state *st = iio_priv(indio_dev); + + st->syscalib_mode[chan->channel] = mode; + + return 0; +} + +static int ad7192_get_syscalib_mode(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan) +{ + struct ad7192_state *st = iio_priv(indio_dev); + + return st->syscalib_mode[chan->channel]; +} + +static ssize_t ad7192_write_syscalib(struct iio_dev *indio_dev, + uintptr_t private, + const struct iio_chan_spec *chan, + const char *buf, size_t len) +{ + struct ad7192_state *st = iio_priv(indio_dev); + bool sys_calib; + int ret, temp; + + ret = strtobool(buf, &sys_calib); + if (ret) + return ret; + + temp = st->syscalib_mode[chan->channel]; + if (sys_calib) { + if (temp == AD7192_SYSCALIB_ZERO_SCALE) + ret = ad_sd_calibrate(&st->sd, AD7192_MODE_CAL_SYS_ZERO, + chan->address); + else + ret = ad_sd_calibrate(&st->sd, AD7192_MODE_CAL_SYS_FULL, + chan->address); + } + + return ret ? ret : len; +} + +static const struct iio_enum ad7192_syscalib_mode_enum = { + .items = ad7192_syscalib_modes, + .num_items = ARRAY_SIZE(ad7192_syscalib_modes), + .set = ad7192_set_syscalib_mode, + .get = ad7192_get_syscalib_mode +}; + +static const struct iio_chan_spec_ext_info ad7192_calibsys_ext_info[] = { + { + .name = "sys_calibration", + .write = ad7192_write_syscalib, + .shared = IIO_SEPARATE, + }, + IIO_ENUM("sys_calibration_mode", IIO_SEPARATE, + &ad7192_syscalib_mode_enum), + IIO_ENUM_AVAILABLE("sys_calibration_mode", &ad7192_syscalib_mode_enum), + {} +}; + static struct ad7192_state *ad_sigma_delta_to_ad7192(struct ad_sigma_delta *sd) { return container_of(sd, struct ad7192_state, sd); @@ -770,9 +845,11 @@ static int ad7192_channels_config(struct iio_dev *indio_dev) *chan = channels[i]; chan->info_mask_shared_by_all |= BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY); - if (chan->type != IIO_TEMP) + if (chan->type != IIO_TEMP) { chan->info_mask_shared_by_type_available |= BIT(IIO_CHAN_INFO_SCALE); + chan->ext_info = ad7192_calibsys_ext_info; + } chan++; } From 5e7965681aced6c844372d3babbda4dbc629fadb Mon Sep 17 00:00:00 2001 From: Colin Ian King Date: Sun, 1 Sep 2019 16:27:49 +0100 Subject: [PATCH 04/41] iio: light: cm36651: redundant assignment to variable ret Variable ret is being assigned a value that is never read and is being re-assigned a little later on. The assignment is redundant and hence can be removed. Addresses-Coverity: ("Ununsed value") Signed-off-by: Colin Ian King Signed-off-by: Jonathan Cameron --- drivers/iio/light/cm36651.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/light/cm36651.c b/drivers/iio/light/cm36651.c index 1019d625adb1..90e38fcc974b 100644 --- a/drivers/iio/light/cm36651.c +++ b/drivers/iio/light/cm36651.c @@ -532,7 +532,7 @@ static int cm36651_write_prox_event_config(struct iio_dev *indio_dev, int state) { struct cm36651_data *cm36651 = iio_priv(indio_dev); - int cmd, ret = -EINVAL; + int cmd, ret; mutex_lock(&cm36651->lock); From cec8b1e3cb518e191a8491a426a03d4507fa82ee Mon Sep 17 00:00:00 2001 From: Artur Rojek Date: Sat, 27 Jul 2019 21:59:38 +0200 Subject: [PATCH 05/41] dt-bindings: iio/adc: Add a compatible string for JZ4770 SoC ADC Add a compatible string for the ADC controller present on Ingenic JZ4770 SoC. Signed-off-by: Artur Rojek Reviewed-by: Rob Herring Signed-off-by: Jonathan Cameron --- Documentation/devicetree/bindings/iio/adc/ingenic,adc.txt | 1 + 1 file changed, 1 insertion(+) diff --git a/Documentation/devicetree/bindings/iio/adc/ingenic,adc.txt b/Documentation/devicetree/bindings/iio/adc/ingenic,adc.txt index f01159f20d87..cd9048cf9dcf 100644 --- a/Documentation/devicetree/bindings/iio/adc/ingenic,adc.txt +++ b/Documentation/devicetree/bindings/iio/adc/ingenic,adc.txt @@ -5,6 +5,7 @@ Required properties: - compatible: Should be one of: * ingenic,jz4725b-adc * ingenic,jz4740-adc + * ingenic,jz4770-adc - reg: ADC controller registers location and length. - clocks: phandle to the SoC's ADC clock. - clock-names: Must be set to "adc". From b23bf21f550a6736316e65bd302fff3c9cf78c7a Mon Sep 17 00:00:00 2001 From: Artur Rojek Date: Sat, 27 Jul 2019 21:59:39 +0200 Subject: [PATCH 06/41] dt-bindings: iio/adc: Add AUX2 channel idx for JZ4770 SoC ADC Introduce support for AUX2 channel found in ADC hardware present on Ingenic JZ4770 SoC. Signed-off-by: Artur Rojek Reviewed-by: Rob Herring Signed-off-by: Jonathan Cameron --- include/dt-bindings/iio/adc/ingenic,adc.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/dt-bindings/iio/adc/ingenic,adc.h b/include/dt-bindings/iio/adc/ingenic,adc.h index 82706b2706ac..42f871ab3272 100644 --- a/include/dt-bindings/iio/adc/ingenic,adc.h +++ b/include/dt-bindings/iio/adc/ingenic,adc.h @@ -6,5 +6,6 @@ /* ADC channel idx. */ #define INGENIC_ADC_AUX 0 #define INGENIC_ADC_BATTERY 1 +#define INGENIC_ADC_AUX2 2 #endif From a515d64885054603fd33a8b31d380b4fbad0f6eb Mon Sep 17 00:00:00 2001 From: Artur Rojek Date: Sat, 27 Jul 2019 21:59:40 +0200 Subject: [PATCH 07/41] IIO: Ingenic JZ47xx: Add support for JZ4770 SoC ADC. Add support for the ADC hardware present on Ingenic JZ4770 SoC. Signed-off-by: Artur Rojek Tested-by: Paul Cercueil Signed-off-by: Jonathan Cameron --- drivers/iio/adc/ingenic-adc.c | 149 +++++++++++++++++++++++++++++----- 1 file changed, 127 insertions(+), 22 deletions(-) diff --git a/drivers/iio/adc/ingenic-adc.c b/drivers/iio/adc/ingenic-adc.c index e234970b7150..7a53c2f8d438 100644 --- a/drivers/iio/adc/ingenic-adc.c +++ b/drivers/iio/adc/ingenic-adc.c @@ -25,9 +25,13 @@ #define JZ_ADC_REG_ADSDAT 0x20 #define JZ_ADC_REG_ADCLK 0x28 +#define JZ_ADC_REG_ENABLE_PD BIT(7) +#define JZ_ADC_REG_CFG_AUX_MD (BIT(0) | BIT(1)) #define JZ_ADC_REG_CFG_BAT_MD BIT(4) #define JZ_ADC_REG_ADCLK_CLKDIV_LSB 0 -#define JZ_ADC_REG_ADCLK_CLKDIV10US_LSB 16 +#define JZ4725B_ADC_REG_ADCLK_CLKDIV10US_LSB 16 +#define JZ4770_ADC_REG_ADCLK_CLKDIV10US_LSB 8 +#define JZ4770_ADC_REG_ADCLK_CLKDIVMS_LSB 16 #define JZ_ADC_AUX_VREF 3300 #define JZ_ADC_AUX_VREF_BITS 12 @@ -37,6 +41,8 @@ #define JZ4725B_ADC_BATTERY_HIGH_VREF_BITS 10 #define JZ4740_ADC_BATTERY_HIGH_VREF (7500 * 0.986) #define JZ4740_ADC_BATTERY_HIGH_VREF_BITS 12 +#define JZ4770_ADC_BATTERY_VREF 6600 +#define JZ4770_ADC_BATTERY_VREF_BITS 12 struct ingenic_adc; @@ -47,6 +53,8 @@ struct ingenic_adc_soc_data { size_t battery_raw_avail_size; const int *battery_scale_avail; size_t battery_scale_avail_size; + unsigned int battery_vref_mode: 1; + unsigned int has_aux2: 1; int (*init_clk_div)(struct device *dev, struct ingenic_adc *adc); }; @@ -54,6 +62,7 @@ struct ingenic_adc { void __iomem *base; struct clk *clk; struct mutex lock; + struct mutex aux_lock; const struct ingenic_adc_soc_data *soc_data; bool low_vref_mode; }; @@ -120,6 +129,8 @@ static int ingenic_adc_write_raw(struct iio_dev *iio_dev, case IIO_CHAN_INFO_SCALE: switch (chan->channel) { case INGENIC_ADC_BATTERY: + if (!adc->soc_data->battery_vref_mode) + return -EINVAL; if (val > JZ_ADC_BATTERY_LOW_VREF) { ingenic_adc_set_config(adc, JZ_ADC_REG_CFG_BAT_MD, @@ -158,6 +169,14 @@ static const int jz4740_adc_battery_scale_avail[] = { JZ_ADC_BATTERY_LOW_VREF, JZ_ADC_BATTERY_LOW_VREF_BITS, }; +static const int jz4770_adc_battery_raw_avail[] = { + 0, 1, (1 << JZ4770_ADC_BATTERY_VREF_BITS) - 1, +}; + +static const int jz4770_adc_battery_scale_avail[] = { + JZ4770_ADC_BATTERY_VREF, JZ4770_ADC_BATTERY_VREF_BITS, +}; + static int jz4725b_adc_init_clk_div(struct device *dev, struct ingenic_adc *adc) { struct clk *parent_clk; @@ -187,7 +206,45 @@ static int jz4725b_adc_init_clk_div(struct device *dev, struct ingenic_adc *adc) /* We also need a divider that produces a 10us clock. */ div_10us = DIV_ROUND_UP(rate, 100000); - writel(((div_10us - 1) << JZ_ADC_REG_ADCLK_CLKDIV10US_LSB) | + writel(((div_10us - 1) << JZ4725B_ADC_REG_ADCLK_CLKDIV10US_LSB) | + (div_main - 1) << JZ_ADC_REG_ADCLK_CLKDIV_LSB, + adc->base + JZ_ADC_REG_ADCLK); + + return 0; +} + +static int jz4770_adc_init_clk_div(struct device *dev, struct ingenic_adc *adc) +{ + struct clk *parent_clk; + unsigned long parent_rate, rate; + unsigned int div_main, div_ms, div_10us; + + parent_clk = clk_get_parent(adc->clk); + if (!parent_clk) { + dev_err(dev, "ADC clock has no parent\n"); + return -ENODEV; + } + parent_rate = clk_get_rate(parent_clk); + + /* + * The JZ4770 ADC works at 20 kHz to 200 kHz. + * We pick the highest rate possible. + */ + div_main = DIV_ROUND_UP(parent_rate, 200000); + div_main = clamp(div_main, 1u, 256u); + rate = parent_rate / div_main; + if (rate < 20000 || rate > 200000) { + dev_err(dev, "No valid divider for ADC main clock\n"); + return -EINVAL; + } + + /* We also need a divider that produces a 10us clock. */ + div_10us = DIV_ROUND_UP(rate, 10000); + /* And another, which produces a 1ms clock. */ + div_ms = DIV_ROUND_UP(rate, 1000); + + writel(((div_ms - 1) << JZ4770_ADC_REG_ADCLK_CLKDIVMS_LSB) | + ((div_10us - 1) << JZ4770_ADC_REG_ADCLK_CLKDIV10US_LSB) | (div_main - 1) << JZ_ADC_REG_ADCLK_CLKDIV_LSB, adc->base + JZ_ADC_REG_ADCLK); @@ -201,6 +258,8 @@ static const struct ingenic_adc_soc_data jz4725b_adc_soc_data = { .battery_raw_avail_size = ARRAY_SIZE(jz4725b_adc_battery_raw_avail), .battery_scale_avail = jz4725b_adc_battery_scale_avail, .battery_scale_avail_size = ARRAY_SIZE(jz4725b_adc_battery_scale_avail), + .battery_vref_mode = true, + .has_aux2 = false, .init_clk_div = jz4725b_adc_init_clk_div, }; @@ -211,9 +270,23 @@ static const struct ingenic_adc_soc_data jz4740_adc_soc_data = { .battery_raw_avail_size = ARRAY_SIZE(jz4740_adc_battery_raw_avail), .battery_scale_avail = jz4740_adc_battery_scale_avail, .battery_scale_avail_size = ARRAY_SIZE(jz4740_adc_battery_scale_avail), + .battery_vref_mode = true, + .has_aux2 = false, .init_clk_div = NULL, /* no ADCLK register on JZ4740 */ }; +static const struct ingenic_adc_soc_data jz4770_adc_soc_data = { + .battery_high_vref = JZ4770_ADC_BATTERY_VREF, + .battery_high_vref_bits = JZ4770_ADC_BATTERY_VREF_BITS, + .battery_raw_avail = jz4770_adc_battery_raw_avail, + .battery_raw_avail_size = ARRAY_SIZE(jz4770_adc_battery_raw_avail), + .battery_scale_avail = jz4770_adc_battery_scale_avail, + .battery_scale_avail_size = ARRAY_SIZE(jz4770_adc_battery_scale_avail), + .battery_vref_mode = false, + .has_aux2 = true, + .init_clk_div = jz4770_adc_init_clk_div, +}; + static int ingenic_adc_read_avail(struct iio_dev *iio_dev, struct iio_chan_spec const *chan, const int **vals, @@ -239,6 +312,42 @@ static int ingenic_adc_read_avail(struct iio_dev *iio_dev, }; } +static int ingenic_adc_read_chan_info_raw(struct ingenic_adc *adc, + struct iio_chan_spec const *chan, + int *val) +{ + int bit, ret, engine = (chan->channel == INGENIC_ADC_BATTERY); + + /* We cannot sample AUX/AUX2 in parallel. */ + mutex_lock(&adc->aux_lock); + if (adc->soc_data->has_aux2 && engine == 0) { + bit = BIT(chan->channel == INGENIC_ADC_AUX2); + ingenic_adc_set_config(adc, JZ_ADC_REG_CFG_AUX_MD, bit); + } + + clk_enable(adc->clk); + ret = ingenic_adc_capture(adc, engine); + if (ret) + goto out; + + switch (chan->channel) { + case INGENIC_ADC_AUX: + case INGENIC_ADC_AUX2: + *val = readw(adc->base + JZ_ADC_REG_ADSDAT); + break; + case INGENIC_ADC_BATTERY: + *val = readw(adc->base + JZ_ADC_REG_ADBDAT); + break; + } + + ret = IIO_VAL_INT; +out: + clk_disable(adc->clk); + mutex_unlock(&adc->aux_lock); + + return ret; +} + static int ingenic_adc_read_raw(struct iio_dev *iio_dev, struct iio_chan_spec const *chan, int *val, @@ -246,32 +355,14 @@ static int ingenic_adc_read_raw(struct iio_dev *iio_dev, long m) { struct ingenic_adc *adc = iio_priv(iio_dev); - int ret; switch (m) { case IIO_CHAN_INFO_RAW: - clk_enable(adc->clk); - ret = ingenic_adc_capture(adc, chan->channel); - if (ret) { - clk_disable(adc->clk); - return ret; - } - - switch (chan->channel) { - case INGENIC_ADC_AUX: - *val = readw(adc->base + JZ_ADC_REG_ADSDAT); - break; - case INGENIC_ADC_BATTERY: - *val = readw(adc->base + JZ_ADC_REG_ADBDAT); - break; - } - - clk_disable(adc->clk); - - return IIO_VAL_INT; + return ingenic_adc_read_chan_info_raw(adc, chan, val); case IIO_CHAN_INFO_SCALE: switch (chan->channel) { case INGENIC_ADC_AUX: + case INGENIC_ADC_AUX2: *val = JZ_ADC_AUX_VREF; *val2 = JZ_ADC_AUX_VREF_BITS; break; @@ -322,6 +413,14 @@ static const struct iio_chan_spec ingenic_channels[] = { .indexed = 1, .channel = INGENIC_ADC_BATTERY, }, + { /* Must always be last in the array. */ + .extend_name = "aux2", + .type = IIO_VOLTAGE, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE), + .indexed = 1, + .channel = INGENIC_ADC_AUX2, + }, }; static int ingenic_adc_probe(struct platform_device *pdev) @@ -343,6 +442,7 @@ static int ingenic_adc_probe(struct platform_device *pdev) adc = iio_priv(iio_dev); mutex_init(&adc->lock); + mutex_init(&adc->aux_lock); adc->soc_data = soc_data; mem_base = platform_get_resource(pdev, IORESOURCE_MEM, 0); @@ -374,6 +474,7 @@ static int ingenic_adc_probe(struct platform_device *pdev) /* Put hardware in a known passive state. */ writeb(0x00, adc->base + JZ_ADC_REG_ENABLE); writeb(0xff, adc->base + JZ_ADC_REG_CTRL); + usleep_range(2000, 3000); /* Must wait at least 2ms. */ clk_disable(adc->clk); ret = devm_add_action_or_reset(dev, ingenic_adc_clk_cleanup, adc->clk); @@ -387,6 +488,9 @@ static int ingenic_adc_probe(struct platform_device *pdev) iio_dev->modes = INDIO_DIRECT_MODE; iio_dev->channels = ingenic_channels; iio_dev->num_channels = ARRAY_SIZE(ingenic_channels); + /* Remove AUX2 from the list of supported channels. */ + if (!adc->soc_data->has_aux2) + iio_dev->num_channels -= 1; iio_dev->info = &ingenic_adc_info; ret = devm_iio_device_register(dev, iio_dev); @@ -400,6 +504,7 @@ static int ingenic_adc_probe(struct platform_device *pdev) static const struct of_device_id ingenic_adc_of_match[] = { { .compatible = "ingenic,jz4725b-adc", .data = &jz4725b_adc_soc_data, }, { .compatible = "ingenic,jz4740-adc", .data = &jz4740_adc_soc_data, }, + { .compatible = "ingenic,jz4770-adc", .data = &jz4770_adc_soc_data, }, { }, }; MODULE_DEVICE_TABLE(of, ingenic_adc_of_match); From f552fde983d378e7339f9ea74a25f918563bf0d3 Mon Sep 17 00:00:00 2001 From: Krzysztof Wilczynski Date: Fri, 13 Sep 2019 22:24:13 +0200 Subject: [PATCH 08/41] iio: light: bh1750: Resolve compiler warning and make code more readable MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Separate the declaration of struct bh1750_chip_info from definition of bh1750_chip_info_tbl[] in a single statement as it makes the code hard to read, and with the extra newline it makes it look as if the bh1750_chip_info_tbl[] had no explicit type. This change also resolves the following compiler warning about the unusual position of the static keyword that can be seen when building with warnings enabled (W=1): drivers/iio/light/bh1750.c:64:1: warning: ‘static’ is not at beginning of declaration [-Wold-style-declaration] Related to commit 3a11fbb037a1 ("iio: light: add support for ROHM BH1710/BH1715/BH1721/BH1750/BH1751 ambient light sensors"). Signed-off-by: Krzysztof Wilczynski Acked-by: Uwe Kleine-König Signed-off-by: Jonathan Cameron --- drivers/iio/light/bh1750.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/iio/light/bh1750.c b/drivers/iio/light/bh1750.c index 28347df78cff..adb5ab9e3439 100644 --- a/drivers/iio/light/bh1750.c +++ b/drivers/iio/light/bh1750.c @@ -59,9 +59,9 @@ struct bh1750_chip_info { u16 int_time_low_mask; u16 int_time_high_mask; -} +}; -static const bh1750_chip_info_tbl[] = { +static const struct bh1750_chip_info bh1750_chip_info_tbl[] = { [BH1710] = { 140, 1022, 300, 400, 250000000, 2, 0x001F, 0x03E0 }, [BH1721] = { 140, 1020, 300, 400, 250000000, 2, 0x0010, 0x03E0 }, [BH1750] = { 31, 254, 69, 1740, 57500000, 1, 0x001F, 0x00E0 }, From 5a56c518c4d22c2b909eff6b18c7e40e1642c53d Mon Sep 17 00:00:00 2001 From: Rohit Sarkar Date: Sat, 14 Sep 2019 02:06:27 +0530 Subject: [PATCH 09/41] staging: iio: ADIS16240: Remove unused include '#include' isn't being used anywhere. Remove it. Signed-off-by: Rohit Sarkar Signed-off-by: Jonathan Cameron --- drivers/staging/iio/accel/adis16240.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/staging/iio/accel/adis16240.c b/drivers/staging/iio/accel/adis16240.c index 82099db4bf0c..a480409090c0 100644 --- a/drivers/staging/iio/accel/adis16240.c +++ b/drivers/staging/iio/accel/adis16240.c @@ -7,7 +7,6 @@ #include #include -#include #include #include #include From c270bbf7bb9ddc4e2a51b3c56557c377c9ac79bc Mon Sep 17 00:00:00 2001 From: Andrea Merello Date: Thu, 12 Sep 2019 16:43:07 +0200 Subject: [PATCH 10/41] iio: ad7949: kill pointless "readback"-handling code The device could be configured to spit out also the configuration word while reading the AD result value (in the same SPI xfer) - this is called "readback" in the device datasheet. The driver checks if readback is enabled and it eventually adjusts the SPI xfer length and it applies proper shifts to still get the data, discarding the configuration word. The readback option is actually never enabled (the driver disables it), so the said checks do not serve for any purpose. Since enabling the readback option seems not to provide any advantage (the driver entirely sets the configuration word without relying on any default value), just kill the said, unused, code. Signed-off-by: Andrea Merello Reviewed-by: Alexandru Ardelean Signed-off-by: Jonathan Cameron --- drivers/iio/adc/ad7949.c | 27 +++------------------------ 1 file changed, 3 insertions(+), 24 deletions(-) diff --git a/drivers/iio/adc/ad7949.c b/drivers/iio/adc/ad7949.c index ac0ffff6c5ae..518044c31a73 100644 --- a/drivers/iio/adc/ad7949.c +++ b/drivers/iio/adc/ad7949.c @@ -57,29 +57,11 @@ struct ad7949_adc_chip { u32 buffer ____cacheline_aligned; }; -static bool ad7949_spi_cfg_is_read_back(struct ad7949_adc_chip *ad7949_adc) -{ - if (!(ad7949_adc->cfg & AD7949_CFG_READ_BACK)) - return true; - - return false; -} - -static int ad7949_spi_bits_per_word(struct ad7949_adc_chip *ad7949_adc) -{ - int ret = ad7949_adc->resolution; - - if (ad7949_spi_cfg_is_read_back(ad7949_adc)) - ret += AD7949_CFG_REG_SIZE_BITS; - - return ret; -} - static int ad7949_spi_write_cfg(struct ad7949_adc_chip *ad7949_adc, u16 val, u16 mask) { int ret; - int bits_per_word = ad7949_spi_bits_per_word(ad7949_adc); + int bits_per_word = ad7949_adc->resolution; int shift = bits_per_word - AD7949_CFG_REG_SIZE_BITS; struct spi_message msg; struct spi_transfer tx[] = { @@ -107,7 +89,7 @@ static int ad7949_spi_read_channel(struct ad7949_adc_chip *ad7949_adc, int *val, unsigned int channel) { int ret; - int bits_per_word = ad7949_spi_bits_per_word(ad7949_adc); + int bits_per_word = ad7949_adc->resolution; int mask = GENMASK(ad7949_adc->resolution, 0); struct spi_message msg; struct spi_transfer tx[] = { @@ -138,10 +120,7 @@ static int ad7949_spi_read_channel(struct ad7949_adc_chip *ad7949_adc, int *val, ad7949_adc->current_channel = channel; - if (ad7949_spi_cfg_is_read_back(ad7949_adc)) - *val = (ad7949_adc->buffer >> AD7949_CFG_REG_SIZE_BITS) & mask; - else - *val = ad7949_adc->buffer & mask; + *val = ad7949_adc->buffer & mask; return 0; } From 9db02d32b8eedb4441f79cb2a1696344060c1b78 Mon Sep 17 00:00:00 2001 From: Lorenzo Bianconi Date: Wed, 11 Sep 2019 08:50:03 +0200 Subject: [PATCH 11/41] iio: imu: st_lsm6dsx: enable LIR for sensor events Enable Latched interrupt by default for sensor events Signed-off-by: Lorenzo Bianconi Tested-by: Sean Nyekjaer Signed-off-by: Jonathan Cameron --- drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h | 2 ++ drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c | 35 ++++++++++++++++++++ 2 files changed, 37 insertions(+) diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h index 80e42c7dbcbe..cb5316488f31 100644 --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h @@ -215,6 +215,7 @@ struct st_lsm6dsx_ext_dev_settings { * @fs_table: Hw sensors gain table (gain + val). * @decimator: List of decimator register info (addr + mask). * @batch: List of FIFO batching register info (addr + mask). + * @lir: Latched interrupt register info (addr + mask). * @fifo_ops: Sensor hw FIFO parameters. * @ts_settings: Hw timer related settings. * @shub_settings: i2c controller related settings. @@ -237,6 +238,7 @@ struct st_lsm6dsx_settings { struct st_lsm6dsx_fs_table_entry fs_table[2]; struct st_lsm6dsx_reg decimator[ST_LSM6DSX_MAX_ID]; struct st_lsm6dsx_reg batch[ST_LSM6DSX_MAX_ID]; + struct st_lsm6dsx_reg lir; struct st_lsm6dsx_fifo_ops fifo_ops; struct st_lsm6dsx_hw_ts_settings ts_settings; struct st_lsm6dsx_shub_settings shub_settings; diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c index 2d3495560136..a208da865efe 100644 --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c @@ -237,6 +237,10 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = { .mask = GENMASK(5, 3), }, }, + .lir = { + .addr = 0x58, + .mask = BIT(0), + }, .fifo_ops = { .update_fifo = st_lsm6dsx_update_fifo, .read_fifo = st_lsm6dsx_read_fifo, @@ -349,6 +353,10 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = { .mask = GENMASK(5, 3), }, }, + .lir = { + .addr = 0x58, + .mask = BIT(0), + }, .fifo_ops = { .update_fifo = st_lsm6dsx_update_fifo, .read_fifo = st_lsm6dsx_read_fifo, @@ -470,6 +478,10 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = { .mask = GENMASK(5, 3), }, }, + .lir = { + .addr = 0x58, + .mask = BIT(0), + }, .fifo_ops = { .update_fifo = st_lsm6dsx_update_fifo, .read_fifo = st_lsm6dsx_read_fifo, @@ -585,6 +597,10 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = { .mask = GENMASK(7, 4), }, }, + .lir = { + .addr = 0x56, + .mask = BIT(0), + }, .fifo_ops = { .update_fifo = st_lsm6dsx_update_fifo, .read_fifo = st_lsm6dsx_read_tagged_fifo, @@ -715,6 +731,10 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = { .mask = GENMASK(7, 4), }, }, + .lir = { + .addr = 0x56, + .mask = BIT(0), + }, .fifo_ops = { .update_fifo = st_lsm6dsx_update_fifo, .read_fifo = st_lsm6dsx_read_tagged_fifo, @@ -822,6 +842,10 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = { .mask = GENMASK(7, 4), }, }, + .lir = { + .addr = 0x56, + .mask = BIT(0), + }, .fifo_ops = { .update_fifo = st_lsm6dsx_update_fifo, .read_fifo = st_lsm6dsx_read_tagged_fifo, @@ -1416,6 +1440,17 @@ static int st_lsm6dsx_init_device(struct st_lsm6dsx_hw *hw) if (err < 0) return err; + /* enable Latched interrupts for device events */ + if (hw->settings->lir.addr) { + unsigned int data; + + data = ST_LSM6DSX_SHIFT_VAL(1, hw->settings->lir.mask); + err = regmap_update_bits(hw->regmap, hw->settings->lir.addr, + hw->settings->lir.mask, data); + if (err < 0) + return err; + } + err = st_lsm6dsx_init_shub(hw); if (err < 0) return err; From 22ea565110731e48d9434d029df4f62c94df0a89 Mon Sep 17 00:00:00 2001 From: Lorenzo Bianconi Date: Wed, 11 Sep 2019 08:50:04 +0200 Subject: [PATCH 12/41] iio: imu: st_lsm6dsx: enable clear on read for latched interrupts Enable clear on read feature for latched interrupts. This bit allows immediately clearing the latched interrupts of an event detection upon the read of the corresponding status register. It must be set to 1 together with LIR. This feature is available just on LSM6DS0/LSM6DSR/ASM330LHH Signed-off-by: Lorenzo Bianconi Tested-by: Sean Nyekjaer Signed-off-by: Jonathan Cameron --- drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h | 2 ++ drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c | 24 ++++++++++++++++++++ 2 files changed, 26 insertions(+) diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h index cb5316488f31..21d14072d1c6 100644 --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h @@ -216,6 +216,7 @@ struct st_lsm6dsx_ext_dev_settings { * @decimator: List of decimator register info (addr + mask). * @batch: List of FIFO batching register info (addr + mask). * @lir: Latched interrupt register info (addr + mask). + * @clear_on_read: Clear on read register info (addr + mask). * @fifo_ops: Sensor hw FIFO parameters. * @ts_settings: Hw timer related settings. * @shub_settings: i2c controller related settings. @@ -239,6 +240,7 @@ struct st_lsm6dsx_settings { struct st_lsm6dsx_reg decimator[ST_LSM6DSX_MAX_ID]; struct st_lsm6dsx_reg batch[ST_LSM6DSX_MAX_ID]; struct st_lsm6dsx_reg lir; + struct st_lsm6dsx_reg clear_on_read; struct st_lsm6dsx_fifo_ops fifo_ops; struct st_lsm6dsx_hw_ts_settings ts_settings; struct st_lsm6dsx_shub_settings shub_settings; diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c index a208da865efe..b65a6ca775e0 100644 --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c @@ -601,6 +601,10 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = { .addr = 0x56, .mask = BIT(0), }, + .clear_on_read = { + .addr = 0x56, + .mask = BIT(6), + }, .fifo_ops = { .update_fifo = st_lsm6dsx_update_fifo, .read_fifo = st_lsm6dsx_read_tagged_fifo, @@ -735,6 +739,10 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = { .addr = 0x56, .mask = BIT(0), }, + .clear_on_read = { + .addr = 0x56, + .mask = BIT(6), + }, .fifo_ops = { .update_fifo = st_lsm6dsx_update_fifo, .read_fifo = st_lsm6dsx_read_tagged_fifo, @@ -846,6 +854,10 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = { .addr = 0x56, .mask = BIT(0), }, + .clear_on_read = { + .addr = 0x56, + .mask = BIT(6), + }, .fifo_ops = { .update_fifo = st_lsm6dsx_update_fifo, .read_fifo = st_lsm6dsx_read_tagged_fifo, @@ -1449,6 +1461,18 @@ static int st_lsm6dsx_init_device(struct st_lsm6dsx_hw *hw) hw->settings->lir.mask, data); if (err < 0) return err; + + /* enable clear on read for latched interrupts */ + if (hw->settings->clear_on_read.addr) { + data = ST_LSM6DSX_SHIFT_VAL(1, + hw->settings->clear_on_read.mask); + err = regmap_update_bits(hw->regmap, + hw->settings->clear_on_read.addr, + hw->settings->clear_on_read.mask, + data); + if (err < 0) + return err; + } } err = st_lsm6dsx_init_shub(hw); From 505ea3ada665c466d0064b11b6e611b7f995517d Mon Sep 17 00:00:00 2001 From: Andrea Merello Date: Mon, 9 Sep 2019 14:58:17 +0200 Subject: [PATCH 13/41] iio: max31856: add missing of_node and parent references to iio_dev Adding missing indio_dev->dev.of_node references so that, in case multiple max31856 are present, users can get some clues to being able to distinguish each of them. While at it, add also the missing parent reference. Signed-off-by: Andrea Merello Signed-off-by: Jonathan Cameron --- drivers/iio/temperature/max31856.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/iio/temperature/max31856.c b/drivers/iio/temperature/max31856.c index f184ba5601d9..73ed550e3fc9 100644 --- a/drivers/iio/temperature/max31856.c +++ b/drivers/iio/temperature/max31856.c @@ -284,6 +284,8 @@ static int max31856_probe(struct spi_device *spi) spi_set_drvdata(spi, indio_dev); indio_dev->info = &max31856_info; + indio_dev->dev.parent = &spi->dev; + indio_dev->dev.of_node = spi->dev.of_node; indio_dev->name = id->name; indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->channels = max31856_channels; From 0fe2f2b789190661df24bb8bf62294145729a1fe Mon Sep 17 00:00:00 2001 From: Alexandru Ardelean Date: Fri, 20 Sep 2019 10:57:23 +0300 Subject: [PATCH 14/41] iio: tcs3414: fix iio_triggered_buffer_{pre,post}enable positions The iio_triggered_buffer_{predisable,postenable} functions attach/detach the poll functions. For the predisable hook, the disable code should occur before detaching the poll func, and for the postenable hook, the poll func should be attached before the enable code. The driver was slightly reworked. The preenable hook was moved to the postenable, to add some symmetry to the postenable/predisable part. Signed-off-by: Alexandru Ardelean Signed-off-by: Jonathan Cameron --- drivers/iio/light/tcs3414.c | 30 ++++++++++++++++++++---------- 1 file changed, 20 insertions(+), 10 deletions(-) diff --git a/drivers/iio/light/tcs3414.c b/drivers/iio/light/tcs3414.c index 7c0291c5fe76..b542e5619ead 100644 --- a/drivers/iio/light/tcs3414.c +++ b/drivers/iio/light/tcs3414.c @@ -240,32 +240,42 @@ static const struct iio_info tcs3414_info = { .attrs = &tcs3414_attribute_group, }; -static int tcs3414_buffer_preenable(struct iio_dev *indio_dev) +static int tcs3414_buffer_postenable(struct iio_dev *indio_dev) { struct tcs3414_data *data = iio_priv(indio_dev); + int ret; + + ret = iio_triggered_buffer_postenable(indio_dev); + if (ret) + return ret; data->control |= TCS3414_CONTROL_ADC_EN; - return i2c_smbus_write_byte_data(data->client, TCS3414_CONTROL, + ret = i2c_smbus_write_byte_data(data->client, TCS3414_CONTROL, data->control); + if (ret) + iio_triggered_buffer_predisable(indio_dev); + + return ret; } static int tcs3414_buffer_predisable(struct iio_dev *indio_dev) { struct tcs3414_data *data = iio_priv(indio_dev); - int ret; - - ret = iio_triggered_buffer_predisable(indio_dev); - if (ret < 0) - return ret; + int ret, ret2; data->control &= ~TCS3414_CONTROL_ADC_EN; - return i2c_smbus_write_byte_data(data->client, TCS3414_CONTROL, + ret = i2c_smbus_write_byte_data(data->client, TCS3414_CONTROL, data->control); + + ret2 = iio_triggered_buffer_predisable(indio_dev); + if (!ret) + ret = ret2; + + return ret; } static const struct iio_buffer_setup_ops tcs3414_buffer_setup_ops = { - .preenable = tcs3414_buffer_preenable, - .postenable = &iio_triggered_buffer_postenable, + .postenable = tcs3414_buffer_postenable, .predisable = tcs3414_buffer_predisable, }; From 348eb0b2c4f0f912d626fa789dfeb084b083e1f0 Mon Sep 17 00:00:00 2001 From: Andrea Merello Date: Thu, 12 Sep 2019 16:43:08 +0200 Subject: [PATCH 15/41] iio: ad7949: fix incorrect SPI xfer len This driver supports 14-bits and 16-bits devices. All of them have a 14-bit configuration registers. All SPI trasfers, for reading AD conversion results and for writing the configuration register, fit in two bytes. The driver always uses 4-bytes xfers which seems at least pointless (maybe even harmful). This patch trims the SPI xfer len and the buffer size to two bytes. Signed-off-by: Andrea Merello Reviewed-by: Alexandru Ardelean Signed-off-by: Jonathan Cameron --- drivers/iio/adc/ad7949.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/iio/adc/ad7949.c b/drivers/iio/adc/ad7949.c index 518044c31a73..5c2b3446fa4a 100644 --- a/drivers/iio/adc/ad7949.c +++ b/drivers/iio/adc/ad7949.c @@ -54,7 +54,7 @@ struct ad7949_adc_chip { u8 resolution; u16 cfg; unsigned int current_channel; - u32 buffer ____cacheline_aligned; + u16 buffer ____cacheline_aligned; }; static int ad7949_spi_write_cfg(struct ad7949_adc_chip *ad7949_adc, u16 val, @@ -67,7 +67,7 @@ static int ad7949_spi_write_cfg(struct ad7949_adc_chip *ad7949_adc, u16 val, struct spi_transfer tx[] = { { .tx_buf = &ad7949_adc->buffer, - .len = 4, + .len = 2, .bits_per_word = bits_per_word, }, }; @@ -95,7 +95,7 @@ static int ad7949_spi_read_channel(struct ad7949_adc_chip *ad7949_adc, int *val, struct spi_transfer tx[] = { { .rx_buf = &ad7949_adc->buffer, - .len = 4, + .len = 2, .bits_per_word = bits_per_word, }, }; From ca4a649694bb159b221eb0cfecec46838473b536 Mon Sep 17 00:00:00 2001 From: Jean-Baptiste Maneyrol Date: Mon, 16 Sep 2019 09:41:58 +0000 Subject: [PATCH 16/41] iio: imu: inv_mpu6050: disable i2c mux for MPU925x Disable i2c mux for supported 9xxx chips. This is a pre-requesite for controling 9xxx magnetometer using the i2c master of the chip. Check in device-tree that there is no i2c-gate device declared for ensuring backward compatibility with existing setups. Signed-off-by: Jean-Baptiste Maneyrol Signed-off-by: Jonathan Cameron --- drivers/iio/imu/inv_mpu6050/inv_mpu_core.c | 7 +-- drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c | 60 +++++++++++++++++++--- drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h | 2 + 3 files changed, 58 insertions(+), 11 deletions(-) diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c index b17f060b52fc..7b2e4d81bbba 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c @@ -1156,9 +1156,6 @@ int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name, return result; } - if (inv_mpu_bus_setup) - inv_mpu_bus_setup(indio_dev); - dev_set_drvdata(dev, indio_dev); indio_dev->dev.parent = dev; /* name will be NULL when enumerated via ACPI */ @@ -1167,6 +1164,10 @@ int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name, else indio_dev->name = dev_name(dev); + /* requires parent device set in indio_dev */ + if (inv_mpu_bus_setup) + inv_mpu_bus_setup(indio_dev); + if (chip_type == INV_ICM20602) { indio_dev->channels = inv_icm20602_channels; indio_dev->num_channels = ARRAY_SIZE(inv_icm20602_channels); diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c index 4b8b5a87398c..389cc8505e0e 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c @@ -68,6 +68,56 @@ static const char *inv_mpu_match_acpi_device(struct device *dev, return dev_name(dev); } +static bool inv_mpu_i2c_aux_bus(struct device *dev) +{ + struct inv_mpu6050_state *st = iio_priv(dev_get_drvdata(dev)); + + switch (st->chip_type) { + case INV_ICM20608: + case INV_ICM20602: + /* no i2c auxiliary bus on the chip */ + return false; + case INV_MPU9250: + case INV_MPU9255: + if (st->magn_disabled) + return true; + else + return false; + default: + return true; + } +} + +/* + * MPU9xxx magnetometer support requires to disable i2c auxiliary bus support. + * To ensure backward compatibility with existing setups, do not disable + * i2c auxiliary bus if it used. + * Check for i2c-gate node in devicetree and set magnetometer disabled. + * Only MPU6500 is supported by ACPI, no need to check. + */ +static int inv_mpu_magn_disable(struct iio_dev *indio_dev) +{ + struct inv_mpu6050_state *st = iio_priv(indio_dev); + struct device *dev = indio_dev->dev.parent; + struct device_node *mux_node; + + switch (st->chip_type) { + case INV_MPU9250: + case INV_MPU9255: + mux_node = of_get_child_by_name(dev->of_node, "i2c-gate"); + if (mux_node != NULL) { + st->magn_disabled = true; + dev_warn(dev, "disable internal use of magnetometer\n"); + } + of_node_put(mux_node); + break; + default: + break; + } + + return 0; +} + /** * inv_mpu_probe() - probe function. * @client: i2c client. @@ -112,17 +162,12 @@ static int inv_mpu_probe(struct i2c_client *client, } result = inv_mpu_core_probe(regmap, client->irq, name, - NULL, chip_type); + inv_mpu_magn_disable, chip_type); if (result < 0) return result; st = iio_priv(dev_get_drvdata(&client->dev)); - switch (st->chip_type) { - case INV_ICM20608: - case INV_ICM20602: - /* no i2c auxiliary bus on the chip */ - break; - default: + if (inv_mpu_i2c_aux_bus(&client->dev)) { /* declare i2c auxiliary bus */ st->muxc = i2c_mux_alloc(client->adapter, &client->dev, 1, 0, I2C_MUX_LOCKED | I2C_MUX_GATE, @@ -137,7 +182,6 @@ static int inv_mpu_probe(struct i2c_client *client, result = inv_mpu_acpi_create_mux_client(client); if (result) goto out_del_mux; - break; } return 0; diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h index db1c6904388b..cbbb2fb8949a 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h @@ -125,6 +125,7 @@ struct inv_mpu6050_hw { * @it_timestamp: timestamp from previous interrupt. * @data_timestamp: timestamp for next data sample. * @vddio_supply voltage regulator for the chip. + * @magn_disabled: magnetometer disabled for backward compatibility reason. */ struct inv_mpu6050_state { struct mutex lock; @@ -146,6 +147,7 @@ struct inv_mpu6050_state { s64 it_timestamp; s64 data_timestamp; struct regulator *vddio_supply; + bool magn_disabled; }; /*register and associated bit definition*/ From 5ffd0248384c6ee5847de8b453d9f1138cf6d2d2 Mon Sep 17 00:00:00 2001 From: Jean-Baptiste Maneyrol Date: Mon, 16 Sep 2019 09:42:00 +0000 Subject: [PATCH 17/41] iio: imu: inv_mpu6050: add header include protection macro Signed-off-by: Jean-Baptiste Maneyrol Signed-off-by: Jonathan Cameron --- drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h index cbbb2fb8949a..7cfd3a05c144 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h @@ -2,6 +2,10 @@ /* * Copyright (C) 2012 Invensense, Inc. */ + +#ifndef INV_MPU_IIO_H_ +#define INV_MPU_IIO_H_ + #include #include #include @@ -344,3 +348,5 @@ void inv_mpu_acpi_delete_mux_client(struct i2c_client *client); int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name, int (*inv_mpu_bus_setup)(struct iio_dev *), int chip_type); extern const struct dev_pm_ops inv_mpu_pmops; + +#endif From 68fd019b89e0efd3d2b1bdd2021ef0acb38b425b Mon Sep 17 00:00:00 2001 From: Jean-Baptiste Maneyrol Date: Mon, 16 Sep 2019 09:42:02 +0000 Subject: [PATCH 18/41] iio: imu: inv_mpu6050: add defines for supporting 9-axis chips Add registers defines required for driving chip i2c master ip. Add MPU9xxx magnetometer scan elements and update data bytes size. Signed-off-by: Jean-Baptiste Maneyrol Signed-off-by: Jonathan Cameron --- drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h | 56 ++++++++++++++++++++++- 1 file changed, 54 insertions(+), 2 deletions(-) diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h index 7cfd3a05c144..04215bc6e8ab 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h @@ -164,9 +164,41 @@ struct inv_mpu6050_state { #define INV_MPU6050_REG_ACCEL_CONFIG 0x1C #define INV_MPU6050_REG_FIFO_EN 0x23 +#define INV_MPU6050_BIT_SLAVE_0 0x01 +#define INV_MPU6050_BIT_SLAVE_1 0x02 +#define INV_MPU6050_BIT_SLAVE_2 0x04 #define INV_MPU6050_BIT_ACCEL_OUT 0x08 #define INV_MPU6050_BITS_GYRO_OUT 0x70 +#define INV_MPU6050_REG_I2C_MST_CTRL 0x24 +#define INV_MPU6050_BITS_I2C_MST_CLK_400KHZ 0x0D +#define INV_MPU6050_BIT_I2C_MST_P_NSR 0x10 +#define INV_MPU6050_BIT_SLV3_FIFO_EN 0x20 +#define INV_MPU6050_BIT_WAIT_FOR_ES 0x40 +#define INV_MPU6050_BIT_MULT_MST_EN 0x80 + +/* control I2C slaves from 0 to 3 */ +#define INV_MPU6050_REG_I2C_SLV_ADDR(_x) (0x25 + 3 * (_x)) +#define INV_MPU6050_BIT_I2C_SLV_RNW 0x80 + +#define INV_MPU6050_REG_I2C_SLV_REG(_x) (0x26 + 3 * (_x)) + +#define INV_MPU6050_REG_I2C_SLV_CTRL(_x) (0x27 + 3 * (_x)) +#define INV_MPU6050_BIT_SLV_GRP 0x10 +#define INV_MPU6050_BIT_SLV_REG_DIS 0x20 +#define INV_MPU6050_BIT_SLV_BYTE_SW 0x40 +#define INV_MPU6050_BIT_SLV_EN 0x80 + +/* I2C master delay register */ +#define INV_MPU6050_REG_I2C_SLV4_CTRL 0x34 +#define INV_MPU6050_BITS_I2C_MST_DLY(_x) ((_x) & 0x1F) + +#define INV_MPU6050_REG_I2C_MST_STATUS 0x36 +#define INV_MPU6050_BIT_I2C_SLV0_NACK 0x01 +#define INV_MPU6050_BIT_I2C_SLV1_NACK 0x02 +#define INV_MPU6050_BIT_I2C_SLV2_NACK 0x04 +#define INV_MPU6050_BIT_I2C_SLV3_NACK 0x08 + #define INV_MPU6050_REG_INT_ENABLE 0x38 #define INV_MPU6050_BIT_DATA_RDY_EN 0x01 #define INV_MPU6050_BIT_DMP_INT_EN 0x02 @@ -179,6 +211,18 @@ struct inv_mpu6050_state { #define INV_MPU6050_BIT_FIFO_OVERFLOW_INT 0x10 #define INV_MPU6050_BIT_RAW_DATA_RDY_INT 0x01 +#define INV_MPU6050_REG_EXT_SENS_DATA 0x49 + +/* I2C slaves data output from 0 to 3 */ +#define INV_MPU6050_REG_I2C_SLV_DO(_x) (0x63 + (_x)) + +#define INV_MPU6050_REG_I2C_MST_DELAY_CTRL 0x67 +#define INV_MPU6050_BIT_I2C_SLV0_DLY_EN 0x01 +#define INV_MPU6050_BIT_I2C_SLV1_DLY_EN 0x02 +#define INV_MPU6050_BIT_I2C_SLV2_DLY_EN 0x04 +#define INV_MPU6050_BIT_I2C_SLV3_DLY_EN 0x08 +#define INV_MPU6050_BIT_DELAY_ES_SHADOW 0x80 + #define INV_MPU6050_REG_USER_CTRL 0x6A #define INV_MPU6050_BIT_FIFO_RST 0x04 #define INV_MPU6050_BIT_DMP_RST 0x08 @@ -206,6 +250,9 @@ struct inv_mpu6050_state { #define INV_MPU6050_BYTES_PER_3AXIS_SENSOR 6 #define INV_MPU6050_FIFO_COUNT_BYTE 2 +/* MPU9X50 9-axis magnetometer */ +#define INV_MPU9X50_BYTES_MAGN 7 + /* ICM20602 FIFO samples include temperature readings */ #define INV_ICM20602_BYTES_PER_TEMP_SENSOR 2 @@ -233,8 +280,8 @@ struct inv_mpu6050_state { #define INV_ICM20602_TEMP_OFFSET 8170 #define INV_ICM20602_TEMP_SCALE 3060 -/* 6 + 6 round up and plus 8 */ -#define INV_MPU6050_OUTPUT_DATA_SIZE 24 +/* 6 + 6 + 7 (for MPU9x50) = 19 round up to 24 and plus 8 */ +#define INV_MPU6050_OUTPUT_DATA_SIZE 32 #define INV_MPU6050_REG_INT_PIN_CFG 0x37 #define INV_MPU6050_ACTIVE_HIGH 0x00 @@ -283,6 +330,11 @@ enum inv_mpu6050_scan { INV_MPU6050_SCAN_GYRO_Y, INV_MPU6050_SCAN_GYRO_Z, INV_MPU6050_SCAN_TIMESTAMP, + + INV_MPU9X50_SCAN_MAGN_X = INV_MPU6050_SCAN_GYRO_Z + 1, + INV_MPU9X50_SCAN_MAGN_Y, + INV_MPU9X50_SCAN_MAGN_Z, + INV_MPU9X50_SCAN_TIMESTAMP, }; /* scan element definition for ICM20602, which includes temperature */ From 9d8261dbc496da7cdc1f060894ab8052fd511895 Mon Sep 17 00:00:00 2001 From: Jean-Baptiste Maneyrol Date: Mon, 16 Sep 2019 09:42:04 +0000 Subject: [PATCH 19/41] iio: imu: inv_mpu6050: fix objects syntax in Makefile Use the correct syntax *-y for declaring object files. Signed-off-by: Jean-Baptiste Maneyrol Signed-off-by: Jonathan Cameron --- drivers/iio/imu/inv_mpu6050/Makefile | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/iio/imu/inv_mpu6050/Makefile b/drivers/iio/imu/inv_mpu6050/Makefile index 70ffe0d13d8c..33bec09fee9b 100644 --- a/drivers/iio/imu/inv_mpu6050/Makefile +++ b/drivers/iio/imu/inv_mpu6050/Makefile @@ -4,10 +4,10 @@ # obj-$(CONFIG_INV_MPU6050_IIO) += inv-mpu6050.o -inv-mpu6050-objs := inv_mpu_core.o inv_mpu_ring.o inv_mpu_trigger.o +inv-mpu6050-y := inv_mpu_core.o inv_mpu_ring.o inv_mpu_trigger.o obj-$(CONFIG_INV_MPU6050_I2C) += inv-mpu6050-i2c.o -inv-mpu6050-i2c-objs := inv_mpu_i2c.o inv_mpu_acpi.o +inv-mpu6050-i2c-y := inv_mpu_i2c.o inv_mpu_acpi.o obj-$(CONFIG_INV_MPU6050_SPI) += inv-mpu6050-spi.o -inv-mpu6050-spi-objs := inv_mpu_spi.o +inv-mpu6050-spi-y := inv_mpu_spi.o From 16ef4337694898c4514b1c967d26d6eb35eb12d5 Mon Sep 17 00:00:00 2001 From: Jean-Baptiste Maneyrol Date: Mon, 16 Sep 2019 09:42:05 +0000 Subject: [PATCH 20/41] iio: imu: inv_mpu6050: helpers for using i2c master on auxiliary bus Add helper functions to use the i2c auxiliary bus with the MPU i2c master block. Support only register based chip, reading and 1 byte writing. These will be useful for initializing magnetometers inside MPU9x50 chips. Signed-off-by: Jean-Baptiste Maneyrol Signed-off-by: Jonathan Cameron --- drivers/iio/imu/inv_mpu6050/Makefile | 3 +- drivers/iio/imu/inv_mpu6050/inv_mpu_aux.c | 204 ++++++++++++++++++++++ drivers/iio/imu/inv_mpu6050/inv_mpu_aux.h | 19 ++ 3 files changed, 225 insertions(+), 1 deletion(-) create mode 100644 drivers/iio/imu/inv_mpu6050/inv_mpu_aux.c create mode 100644 drivers/iio/imu/inv_mpu6050/inv_mpu_aux.h diff --git a/drivers/iio/imu/inv_mpu6050/Makefile b/drivers/iio/imu/inv_mpu6050/Makefile index 33bec09fee9b..2cfbd926522f 100644 --- a/drivers/iio/imu/inv_mpu6050/Makefile +++ b/drivers/iio/imu/inv_mpu6050/Makefile @@ -4,7 +4,8 @@ # obj-$(CONFIG_INV_MPU6050_IIO) += inv-mpu6050.o -inv-mpu6050-y := inv_mpu_core.o inv_mpu_ring.o inv_mpu_trigger.o +inv-mpu6050-y := inv_mpu_core.o inv_mpu_ring.o inv_mpu_trigger.o \ + inv_mpu_aux.o obj-$(CONFIG_INV_MPU6050_I2C) += inv-mpu6050-i2c.o inv-mpu6050-i2c-y := inv_mpu_i2c.o inv_mpu_acpi.o diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_aux.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_aux.c new file mode 100644 index 000000000000..7327e5723f96 --- /dev/null +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_aux.c @@ -0,0 +1,204 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 TDK-InvenSense, Inc. + */ + +#include +#include +#include +#include + +#include "inv_mpu_aux.h" +#include "inv_mpu_iio.h" + +/* + * i2c master auxiliary bus transfer function. + * Requires the i2c operations to be correctly setup before. + */ +static int inv_mpu_i2c_master_xfer(const struct inv_mpu6050_state *st) +{ + /* use 50hz frequency for xfer */ + const unsigned int freq = 50; + const unsigned int period_ms = 1000 / freq; + uint8_t d; + unsigned int user_ctrl; + int ret; + + /* set sample rate */ + d = INV_MPU6050_FIFO_RATE_TO_DIVIDER(freq); + ret = regmap_write(st->map, st->reg->sample_rate_div, d); + if (ret) + return ret; + + /* start i2c master */ + user_ctrl = st->chip_config.user_ctrl | INV_MPU6050_BIT_I2C_MST_EN; + ret = regmap_write(st->map, st->reg->user_ctrl, user_ctrl); + if (ret) + goto error_restore_rate; + + /* wait for xfer: 1 period + half-period margin */ + msleep(period_ms + period_ms / 2); + + /* stop i2c master */ + user_ctrl = st->chip_config.user_ctrl; + ret = regmap_write(st->map, st->reg->user_ctrl, user_ctrl); + if (ret) + goto error_stop_i2c; + + /* restore sample rate */ + d = st->chip_config.divider; + ret = regmap_write(st->map, st->reg->sample_rate_div, d); + if (ret) + goto error_restore_rate; + + return 0; + +error_stop_i2c: + regmap_write(st->map, st->reg->user_ctrl, st->chip_config.user_ctrl); +error_restore_rate: + regmap_write(st->map, st->reg->sample_rate_div, st->chip_config.divider); + return ret; +} + +/** + * inv_mpu_aux_init() - init i2c auxiliary bus + * @st: driver internal state + * + * Returns 0 on success, a negative error code otherwise. + */ +int inv_mpu_aux_init(const struct inv_mpu6050_state *st) +{ + unsigned int val; + int ret; + + /* configure i2c master */ + val = INV_MPU6050_BITS_I2C_MST_CLK_400KHZ | + INV_MPU6050_BIT_WAIT_FOR_ES; + ret = regmap_write(st->map, INV_MPU6050_REG_I2C_MST_CTRL, val); + if (ret) + return ret; + + /* configure i2c master delay */ + ret = regmap_write(st->map, INV_MPU6050_REG_I2C_SLV4_CTRL, 0); + if (ret) + return ret; + + val = INV_MPU6050_BIT_I2C_SLV0_DLY_EN | + INV_MPU6050_BIT_I2C_SLV1_DLY_EN | + INV_MPU6050_BIT_I2C_SLV2_DLY_EN | + INV_MPU6050_BIT_I2C_SLV3_DLY_EN | + INV_MPU6050_BIT_DELAY_ES_SHADOW; + return regmap_write(st->map, INV_MPU6050_REG_I2C_MST_DELAY_CTRL, val); +} + +/** + * inv_mpu_aux_read() - read register function for i2c auxiliary bus + * @st: driver internal state. + * @addr: chip i2c Address + * @reg: chip register address + * @val: buffer for storing read bytes + * @size: number of bytes to read + * + * Returns 0 on success, a negative error code otherwise. + */ +int inv_mpu_aux_read(const struct inv_mpu6050_state *st, uint8_t addr, + uint8_t reg, uint8_t *val, size_t size) +{ + unsigned int status; + int ret; + + if (size > 0x0F) + return -EINVAL; + + /* setup i2c SLV0 control: i2c addr, register, enable + size */ + ret = regmap_write(st->map, INV_MPU6050_REG_I2C_SLV_ADDR(0), + INV_MPU6050_BIT_I2C_SLV_RNW | addr); + if (ret) + return ret; + ret = regmap_write(st->map, INV_MPU6050_REG_I2C_SLV_REG(0), reg); + if (ret) + return ret; + ret = regmap_write(st->map, INV_MPU6050_REG_I2C_SLV_CTRL(0), + INV_MPU6050_BIT_SLV_EN | size); + if (ret) + return ret; + + /* do i2c xfer */ + ret = inv_mpu_i2c_master_xfer(st); + if (ret) + goto error_disable_i2c; + + /* disable i2c slave */ + ret = regmap_write(st->map, INV_MPU6050_REG_I2C_SLV_CTRL(0), 0); + if (ret) + goto error_disable_i2c; + + /* check i2c status */ + ret = regmap_read(st->map, INV_MPU6050_REG_I2C_MST_STATUS, &status); + if (ret) + return ret; + if (status & INV_MPU6050_BIT_I2C_SLV0_NACK) + return -EIO; + + /* read data in registers */ + return regmap_bulk_read(st->map, INV_MPU6050_REG_EXT_SENS_DATA, + val, size); + +error_disable_i2c: + regmap_write(st->map, INV_MPU6050_REG_I2C_SLV_CTRL(0), 0); + return ret; +} + +/** + * inv_mpu_aux_write() - write register function for i2c auxiliary bus + * @st: driver internal state. + * @addr: chip i2c Address + * @reg: chip register address + * @val: 1 byte value to write + * + * Returns 0 on success, a negative error code otherwise. + */ +int inv_mpu_aux_write(const struct inv_mpu6050_state *st, uint8_t addr, + uint8_t reg, uint8_t val) +{ + unsigned int status; + int ret; + + /* setup i2c SLV0 control: i2c addr, register, value, enable + size */ + ret = regmap_write(st->map, INV_MPU6050_REG_I2C_SLV_ADDR(0), addr); + if (ret) + return ret; + ret = regmap_write(st->map, INV_MPU6050_REG_I2C_SLV_REG(0), reg); + if (ret) + return ret; + ret = regmap_write(st->map, INV_MPU6050_REG_I2C_SLV_DO(0), val); + if (ret) + return ret; + ret = regmap_write(st->map, INV_MPU6050_REG_I2C_SLV_CTRL(0), + INV_MPU6050_BIT_SLV_EN | 1); + if (ret) + return ret; + + /* do i2c xfer */ + ret = inv_mpu_i2c_master_xfer(st); + if (ret) + goto error_disable_i2c; + + /* disable i2c slave */ + ret = regmap_write(st->map, INV_MPU6050_REG_I2C_SLV_CTRL(0), 0); + if (ret) + goto error_disable_i2c; + + /* check i2c status */ + ret = regmap_read(st->map, INV_MPU6050_REG_I2C_MST_STATUS, &status); + if (ret) + return ret; + if (status & INV_MPU6050_BIT_I2C_SLV0_NACK) + return -EIO; + + return 0; + +error_disable_i2c: + regmap_write(st->map, INV_MPU6050_REG_I2C_SLV_CTRL(0), 0); + return ret; +} diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_aux.h b/drivers/iio/imu/inv_mpu6050/inv_mpu_aux.h new file mode 100644 index 000000000000..b66997545762 --- /dev/null +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_aux.h @@ -0,0 +1,19 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2019 TDK-InvenSense, Inc. + */ + +#ifndef INV_MPU_AUX_H_ +#define INV_MPU_AUX_H_ + +#include "inv_mpu_iio.h" + +int inv_mpu_aux_init(const struct inv_mpu6050_state *st); + +int inv_mpu_aux_read(const struct inv_mpu6050_state *st, uint8_t addr, + uint8_t reg, uint8_t *val, size_t size); + +int inv_mpu_aux_write(const struct inv_mpu6050_state *st, uint8_t addr, + uint8_t reg, uint8_t val); + +#endif /* INV_MPU_AUX_H_ */ From b1392de061840b49478f7b8ad29d81973d3ce171 Mon Sep 17 00:00:00 2001 From: Jean-Baptiste Maneyrol Date: Mon, 16 Sep 2019 09:42:07 +0000 Subject: [PATCH 21/41] iio: imu: inv_mpu6050: add MPU925x magnetometer support Add support of driving MPU9250 magnetometer connected on i2c auxiliary bus using the MPU i2c master. Signed-off-by: Jean-Baptiste Maneyrol Signed-off-by: Jonathan Cameron --- drivers/iio/imu/inv_mpu6050/Makefile | 2 +- drivers/iio/imu/inv_mpu6050/inv_mpu_core.c | 144 ++++++++- drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h | 4 + drivers/iio/imu/inv_mpu6050/inv_mpu_magn.c | 356 +++++++++++++++++++++ drivers/iio/imu/inv_mpu6050/inv_mpu_magn.h | 36 +++ 5 files changed, 538 insertions(+), 4 deletions(-) create mode 100644 drivers/iio/imu/inv_mpu6050/inv_mpu_magn.c create mode 100644 drivers/iio/imu/inv_mpu6050/inv_mpu_magn.h diff --git a/drivers/iio/imu/inv_mpu6050/Makefile b/drivers/iio/imu/inv_mpu6050/Makefile index 2cfbd926522f..c103441a906b 100644 --- a/drivers/iio/imu/inv_mpu6050/Makefile +++ b/drivers/iio/imu/inv_mpu6050/Makefile @@ -5,7 +5,7 @@ obj-$(CONFIG_INV_MPU6050_IIO) += inv-mpu6050.o inv-mpu6050-y := inv_mpu_core.o inv_mpu_ring.o inv_mpu_trigger.o \ - inv_mpu_aux.o + inv_mpu_aux.o inv_mpu_magn.o obj-$(CONFIG_INV_MPU6050_I2C) += inv-mpu6050-i2c.o inv-mpu6050-i2c-y := inv_mpu_i2c.o inv_mpu_acpi.o diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c index 7b2e4d81bbba..f1c65e0dd1a5 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c @@ -17,6 +17,7 @@ #include #include #include "inv_mpu_iio.h" +#include "inv_mpu_magn.h" /* * this is the gyro scale translated from dynamic range plus/minus @@ -332,6 +333,11 @@ static int inv_mpu6050_init_config(struct iio_dev *indio_dev) */ st->chip_period = NSEC_PER_MSEC; + /* magn chip init, noop if not present in the chip */ + result = inv_mpu_magn_probe(st); + if (result) + goto error_power_off; + return inv_mpu6050_set_power_itg(st, false); error_power_off: @@ -411,6 +417,9 @@ static int inv_mpu6050_read_channel_data(struct iio_dev *indio_dev, ret = inv_mpu6050_sensor_show(st, st->reg->temperature, IIO_MOD_X, val); break; + case IIO_MAGN: + ret = inv_mpu_magn_read(st, chan->channel2, val); + break; default: ret = -EINVAL; break; @@ -469,6 +478,8 @@ inv_mpu6050_read_raw(struct iio_dev *indio_dev, *val2 = INV_MPU6050_TEMP_SCALE; return IIO_VAL_INT_PLUS_MICRO; + case IIO_MAGN: + return inv_mpu_magn_get_scale(st, chan, val, val2); default: return -EINVAL; } @@ -710,6 +721,11 @@ inv_mpu6050_fifo_rate_store(struct device *dev, struct device_attribute *attr, if (result) goto fifo_rate_fail_power_off; + /* update rate for magn, noop if not present in chip */ + result = inv_mpu_magn_set_rate(st, fifo_rate); + if (result) + goto fifo_rate_fail_power_off; + fifo_rate_fail_power_off: result |= inv_mpu6050_set_power_itg(st, false); fifo_rate_fail_unlock: @@ -795,8 +811,14 @@ inv_get_mount_matrix(const struct iio_dev *indio_dev, const struct iio_chan_spec *chan) { struct inv_mpu6050_state *data = iio_priv(indio_dev); + const struct iio_mount_matrix *matrix; - return &data->orientation; + if (chan->type == IIO_MAGN) + matrix = &data->magn_orient; + else + matrix = &data->orientation; + + return matrix; } static const struct iio_chan_spec_ext_info inv_ext_info[] = { @@ -864,6 +886,98 @@ static const unsigned long inv_mpu_scan_masks[] = { 0, }; +#define INV_MPU9X50_MAGN_CHAN(_chan2, _bits, _index) \ + { \ + .type = IIO_MAGN, \ + .modified = 1, \ + .channel2 = _chan2, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_SCALE) | \ + BIT(IIO_CHAN_INFO_RAW), \ + .scan_index = _index, \ + .scan_type = { \ + .sign = 's', \ + .realbits = _bits, \ + .storagebits = 16, \ + .shift = 0, \ + .endianness = IIO_BE, \ + }, \ + .ext_info = inv_ext_info, \ + } + +static const struct iio_chan_spec inv_mpu9250_channels[] = { + IIO_CHAN_SOFT_TIMESTAMP(INV_MPU9X50_SCAN_TIMESTAMP), + /* + * Note that temperature should only be via polled reading only, + * not the final scan elements output. + */ + { + .type = IIO_TEMP, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) + | BIT(IIO_CHAN_INFO_OFFSET) + | BIT(IIO_CHAN_INFO_SCALE), + .scan_index = -1, + }, + INV_MPU6050_CHAN(IIO_ANGL_VEL, IIO_MOD_X, INV_MPU6050_SCAN_GYRO_X), + INV_MPU6050_CHAN(IIO_ANGL_VEL, IIO_MOD_Y, INV_MPU6050_SCAN_GYRO_Y), + INV_MPU6050_CHAN(IIO_ANGL_VEL, IIO_MOD_Z, INV_MPU6050_SCAN_GYRO_Z), + + INV_MPU6050_CHAN(IIO_ACCEL, IIO_MOD_X, INV_MPU6050_SCAN_ACCL_X), + INV_MPU6050_CHAN(IIO_ACCEL, IIO_MOD_Y, INV_MPU6050_SCAN_ACCL_Y), + INV_MPU6050_CHAN(IIO_ACCEL, IIO_MOD_Z, INV_MPU6050_SCAN_ACCL_Z), + + /* Magnetometer resolution is 16 bits */ + INV_MPU9X50_MAGN_CHAN(IIO_MOD_X, 16, INV_MPU9X50_SCAN_MAGN_X), + INV_MPU9X50_MAGN_CHAN(IIO_MOD_Y, 16, INV_MPU9X50_SCAN_MAGN_Y), + INV_MPU9X50_MAGN_CHAN(IIO_MOD_Z, 16, INV_MPU9X50_SCAN_MAGN_Z), +}; + +static const unsigned long inv_mpu9x50_scan_masks[] = { + /* 3-axis accel */ + BIT(INV_MPU6050_SCAN_ACCL_X) + | BIT(INV_MPU6050_SCAN_ACCL_Y) + | BIT(INV_MPU6050_SCAN_ACCL_Z), + /* 3-axis gyro */ + BIT(INV_MPU6050_SCAN_GYRO_X) + | BIT(INV_MPU6050_SCAN_GYRO_Y) + | BIT(INV_MPU6050_SCAN_GYRO_Z), + /* 3-axis magn */ + BIT(INV_MPU9X50_SCAN_MAGN_X) + | BIT(INV_MPU9X50_SCAN_MAGN_Y) + | BIT(INV_MPU9X50_SCAN_MAGN_Z), + /* 6-axis accel + gyro */ + BIT(INV_MPU6050_SCAN_ACCL_X) + | BIT(INV_MPU6050_SCAN_ACCL_Y) + | BIT(INV_MPU6050_SCAN_ACCL_Z) + | BIT(INV_MPU6050_SCAN_GYRO_X) + | BIT(INV_MPU6050_SCAN_GYRO_Y) + | BIT(INV_MPU6050_SCAN_GYRO_Z), + /* 6-axis accel + magn */ + BIT(INV_MPU6050_SCAN_ACCL_X) + | BIT(INV_MPU6050_SCAN_ACCL_Y) + | BIT(INV_MPU6050_SCAN_ACCL_Z) + | BIT(INV_MPU9X50_SCAN_MAGN_X) + | BIT(INV_MPU9X50_SCAN_MAGN_Y) + | BIT(INV_MPU9X50_SCAN_MAGN_Z), + /* 6-axis gyro + magn */ + BIT(INV_MPU6050_SCAN_GYRO_X) + | BIT(INV_MPU6050_SCAN_GYRO_Y) + | BIT(INV_MPU6050_SCAN_GYRO_Z) + | BIT(INV_MPU9X50_SCAN_MAGN_X) + | BIT(INV_MPU9X50_SCAN_MAGN_Y) + | BIT(INV_MPU9X50_SCAN_MAGN_Z), + /* 9-axis accel + gyro + magn */ + BIT(INV_MPU6050_SCAN_ACCL_X) + | BIT(INV_MPU6050_SCAN_ACCL_Y) + | BIT(INV_MPU6050_SCAN_ACCL_Z) + | BIT(INV_MPU6050_SCAN_GYRO_X) + | BIT(INV_MPU6050_SCAN_GYRO_Y) + | BIT(INV_MPU6050_SCAN_GYRO_Z) + | BIT(INV_MPU9X50_SCAN_MAGN_X) + | BIT(INV_MPU9X50_SCAN_MAGN_Y) + | BIT(INV_MPU9X50_SCAN_MAGN_Z), + 0, +}; + static const struct iio_chan_spec inv_icm20602_channels[] = { IIO_CHAN_SOFT_TIMESTAMP(INV_ICM20602_SCAN_TIMESTAMP), { @@ -1145,6 +1259,11 @@ int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name, return result; } + /* fill magnetometer orientation */ + result = inv_mpu_magn_set_orient(st); + if (result) + return result; + /* power is turned on inside check chip type*/ result = inv_check_and_setup_chip(st); if (result) @@ -1168,14 +1287,33 @@ int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name, if (inv_mpu_bus_setup) inv_mpu_bus_setup(indio_dev); - if (chip_type == INV_ICM20602) { + switch (chip_type) { + case INV_MPU9250: + case INV_MPU9255: + /* + * Use magnetometer inside the chip only if there is no i2c + * auxiliary device in use. + */ + if (!st->magn_disabled) { + indio_dev->channels = inv_mpu9250_channels; + indio_dev->num_channels = ARRAY_SIZE(inv_mpu9250_channels); + indio_dev->available_scan_masks = inv_mpu9x50_scan_masks; + } else { + indio_dev->channels = inv_mpu_channels; + indio_dev->num_channels = ARRAY_SIZE(inv_mpu_channels); + indio_dev->available_scan_masks = inv_mpu_scan_masks; + } + break; + case INV_ICM20602: indio_dev->channels = inv_icm20602_channels; indio_dev->num_channels = ARRAY_SIZE(inv_icm20602_channels); indio_dev->available_scan_masks = inv_icm20602_scan_masks; - } else { + break; + default: indio_dev->channels = inv_mpu_channels; indio_dev->num_channels = ARRAY_SIZE(inv_mpu_channels); indio_dev->available_scan_masks = inv_mpu_scan_masks; + break; } indio_dev->info = &mpu_info; diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h index 04215bc6e8ab..953f85618199 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h @@ -130,6 +130,8 @@ struct inv_mpu6050_hw { * @data_timestamp: timestamp for next data sample. * @vddio_supply voltage regulator for the chip. * @magn_disabled: magnetometer disabled for backward compatibility reason. + * @magn_raw_to_gauss: coefficient to convert mag raw value to Gauss. + * @magn_orient: magnetometer sensor chip orientation if available. */ struct inv_mpu6050_state { struct mutex lock; @@ -152,6 +154,8 @@ struct inv_mpu6050_state { s64 data_timestamp; struct regulator *vddio_supply; bool magn_disabled; + s32 magn_raw_to_gauss[3]; + struct iio_mount_matrix magn_orient; }; /*register and associated bit definition*/ diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_magn.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_magn.c new file mode 100644 index 000000000000..02735af152c8 --- /dev/null +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_magn.c @@ -0,0 +1,356 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 TDK-InvenSense, Inc. + */ + +#include +#include +#include + +#include "inv_mpu_aux.h" +#include "inv_mpu_iio.h" +#include "inv_mpu_magn.h" + +/* + * MPU9250 magnetometer is an AKM AK8963 chip on I2C aux bus + */ +#define INV_MPU_MAGN_I2C_ADDR 0x0C + +#define INV_MPU_MAGN_REG_WIA 0x00 +#define INV_MPU_MAGN_BITS_WIA 0x48 + +#define INV_MPU_MAGN_REG_ST1 0x02 +#define INV_MPU_MAGN_BIT_DRDY 0x01 +#define INV_MPU_MAGN_BIT_DOR 0x02 + +#define INV_MPU_MAGN_REG_DATA 0x03 + +#define INV_MPU_MAGN_REG_ST2 0x09 +#define INV_MPU_MAGN_BIT_HOFL 0x08 +#define INV_MPU_MAGN_BIT_BITM 0x10 + +#define INV_MPU_MAGN_REG_CNTL1 0x0A +#define INV_MPU_MAGN_BITS_MODE_PWDN 0x00 +#define INV_MPU_MAGN_BITS_MODE_SINGLE 0x01 +#define INV_MPU_MAGN_BITS_MODE_FUSE 0x0F +#define INV_MPU_MAGN_BIT_OUTPUT_BIT 0x10 + +#define INV_MPU_MAGN_REG_CNTL2 0x0B +#define INV_MPU_MAGN_BIT_SRST 0x01 + +#define INV_MPU_MAGN_REG_ASAX 0x10 +#define INV_MPU_MAGN_REG_ASAY 0x11 +#define INV_MPU_MAGN_REG_ASAZ 0x12 + +/* Magnetometer maximum frequency */ +#define INV_MPU_MAGN_FREQ_HZ_MAX 50 + +static bool inv_magn_supported(const struct inv_mpu6050_state *st) +{ + switch (st->chip_type) { + case INV_MPU9250: + case INV_MPU9255: + return true; + default: + return false; + } +} + +/* init magnetometer chip */ +static int inv_magn_init(struct inv_mpu6050_state *st) +{ + uint8_t val; + uint8_t asa[3]; + int ret; + + /* check whoami */ + ret = inv_mpu_aux_read(st, INV_MPU_MAGN_I2C_ADDR, INV_MPU_MAGN_REG_WIA, + &val, sizeof(val)); + if (ret) + return ret; + if (val != INV_MPU_MAGN_BITS_WIA) + return -ENODEV; + + /* reset chip */ + ret = inv_mpu_aux_write(st, INV_MPU_MAGN_I2C_ADDR, + INV_MPU_MAGN_REG_CNTL2, + INV_MPU_MAGN_BIT_SRST); + if (ret) + return ret; + + /* read fuse ROM data */ + ret = inv_mpu_aux_write(st, INV_MPU_MAGN_I2C_ADDR, + INV_MPU_MAGN_REG_CNTL1, + INV_MPU_MAGN_BITS_MODE_FUSE); + if (ret) + return ret; + + ret = inv_mpu_aux_read(st, INV_MPU_MAGN_I2C_ADDR, INV_MPU_MAGN_REG_ASAX, + asa, sizeof(asa)); + if (ret) + return ret; + + /* switch back to power-down */ + ret = inv_mpu_aux_write(st, INV_MPU_MAGN_I2C_ADDR, + INV_MPU_MAGN_REG_CNTL1, + INV_MPU_MAGN_BITS_MODE_PWDN); + if (ret) + return ret; + + /* + * Sensitivity adjustement and scale to Gauss + * + * Hadj = H * (((ASA - 128) * 0.5 / 128) + 1) + * Factor simplification: + * Hadj = H * ((ASA + 128) / 256) + * + * Sensor sentivity + * 0.15 uT in 16 bits mode + * 1 uT = 0.01 G and value is in micron (1e6) + * sensitvity = 0.15 uT * 0.01 * 1e6 + * + * raw_to_gauss = Hadj * 1500 + */ + st->magn_raw_to_gauss[0] = (((int32_t)asa[0] + 128) * 1500) / 256; + st->magn_raw_to_gauss[1] = (((int32_t)asa[1] + 128) * 1500) / 256; + st->magn_raw_to_gauss[2] = (((int32_t)asa[2] + 128) * 1500) / 256; + + return 0; +} + +/** + * inv_mpu_magn_probe() - probe and setup magnetometer chip + * @st: driver internal state + * + * Returns 0 on success, a negative error code otherwise + * + * It is probing the chip and setting up all needed i2c transfers. + * Noop if there is no magnetometer in the chip. + */ +int inv_mpu_magn_probe(struct inv_mpu6050_state *st) +{ + int ret; + + /* quit if chip is not supported */ + if (!inv_magn_supported(st)) + return 0; + + /* configure i2c master aux port */ + ret = inv_mpu_aux_init(st); + if (ret) + return ret; + + /* check and init mag chip */ + ret = inv_magn_init(st); + if (ret) + return ret; + + /* + * configure mpu i2c master accesses + * i2c SLV0: read sensor data, 7 bytes data(6)-ST2 + * Byte swap data to store them in big-endian in impair address groups + */ + ret = regmap_write(st->map, INV_MPU6050_REG_I2C_SLV_ADDR(0), + INV_MPU6050_BIT_I2C_SLV_RNW | INV_MPU_MAGN_I2C_ADDR); + if (ret) + return ret; + + ret = regmap_write(st->map, INV_MPU6050_REG_I2C_SLV_REG(0), + INV_MPU_MAGN_REG_DATA); + if (ret) + return ret; + + ret = regmap_write(st->map, INV_MPU6050_REG_I2C_SLV_CTRL(0), + INV_MPU6050_BIT_SLV_EN | + INV_MPU6050_BIT_SLV_BYTE_SW | + INV_MPU6050_BIT_SLV_GRP | + INV_MPU9X50_BYTES_MAGN); + if (ret) + return ret; + + /* i2c SLV1: launch single measurement */ + ret = regmap_write(st->map, INV_MPU6050_REG_I2C_SLV_ADDR(1), + INV_MPU_MAGN_I2C_ADDR); + if (ret) + return ret; + + ret = regmap_write(st->map, INV_MPU6050_REG_I2C_SLV_REG(1), + INV_MPU_MAGN_REG_CNTL1); + if (ret) + return ret; + + /* add 16 bits mode */ + ret = regmap_write(st->map, INV_MPU6050_REG_I2C_SLV_DO(1), + INV_MPU_MAGN_BITS_MODE_SINGLE | + INV_MPU_MAGN_BIT_OUTPUT_BIT); + if (ret) + return ret; + + return regmap_write(st->map, INV_MPU6050_REG_I2C_SLV_CTRL(1), + INV_MPU6050_BIT_SLV_EN | 1); +} + +/** + * inv_mpu_magn_set_rate() - set magnetometer sampling rate + * @st: driver internal state + * @fifo_rate: mpu set fifo rate + * + * Returns 0 on success, a negative error code otherwise + * + * Limit sampling frequency to the maximum value supported by the + * magnetometer chip. Resulting in duplicated data for higher frequencies. + * Noop if there is no magnetometer in the chip. + */ +int inv_mpu_magn_set_rate(const struct inv_mpu6050_state *st, int fifo_rate) +{ + uint8_t d; + + /* quit if chip is not supported */ + if (!inv_magn_supported(st)) + return 0; + + /* + * update i2c master delay to limit mag sampling to max frequency + * compute fifo_rate divider d: rate = fifo_rate / (d + 1) + */ + if (fifo_rate > INV_MPU_MAGN_FREQ_HZ_MAX) + d = fifo_rate / INV_MPU_MAGN_FREQ_HZ_MAX - 1; + else + d = 0; + + return regmap_write(st->map, INV_MPU6050_REG_I2C_SLV4_CTRL, d); +} + +/** + * inv_mpu_magn_set_orient() - fill magnetometer mounting matrix + * @st: driver internal state + * + * Returns 0 on success, a negative error code otherwise + * + * Fill magnetometer mounting matrix using the provided chip matrix. + */ +int inv_mpu_magn_set_orient(struct inv_mpu6050_state *st) +{ + const char *orient; + char *str; + int i; + + /* fill magnetometer orientation */ + switch (st->chip_type) { + case INV_MPU9250: + case INV_MPU9255: + /* x <- y */ + st->magn_orient.rotation[0] = st->orientation.rotation[3]; + st->magn_orient.rotation[1] = st->orientation.rotation[4]; + st->magn_orient.rotation[2] = st->orientation.rotation[5]; + /* y <- x */ + st->magn_orient.rotation[3] = st->orientation.rotation[0]; + st->magn_orient.rotation[4] = st->orientation.rotation[1]; + st->magn_orient.rotation[5] = st->orientation.rotation[2]; + /* z <- -z */ + for (i = 0; i < 3; ++i) { + orient = st->orientation.rotation[6 + i]; + /* use length + 2 for adding minus sign if needed */ + str = devm_kzalloc(regmap_get_device(st->map), + strlen(orient) + 2, GFP_KERNEL); + if (str == NULL) + return -ENOMEM; + if (strcmp(orient, "0") == 0) { + strcpy(str, orient); + } else if (orient[0] == '-') { + strcpy(str, &orient[1]); + } else { + str[0] = '-'; + strcpy(&str[1], orient); + } + st->magn_orient.rotation[6 + i] = str; + } + break; + default: + st->magn_orient = st->orientation; + break; + } + + return 0; +} + +/** + * inv_mpu_magn_read() - read magnetometer data + * @st: driver internal state + * @axis: IIO modifier axis value + * @val: store corresponding axis value + * + * Returns 0 on success, a negative error code otherwise + */ +int inv_mpu_magn_read(const struct inv_mpu6050_state *st, int axis, int *val) +{ + unsigned int user_ctrl, status; + __be16 data[3]; + uint8_t addr; + uint8_t d; + unsigned int period_ms; + int ret; + + /* quit if chip is not supported */ + if (!inv_magn_supported(st)) + return -ENODEV; + + /* Mag data: X - Y - Z */ + switch (axis) { + case IIO_MOD_X: + addr = 0; + break; + case IIO_MOD_Y: + addr = 1; + break; + case IIO_MOD_Z: + addr = 2; + break; + default: + return -EINVAL; + } + + /* set sample rate to max mag freq */ + d = INV_MPU6050_FIFO_RATE_TO_DIVIDER(INV_MPU_MAGN_FREQ_HZ_MAX); + ret = regmap_write(st->map, st->reg->sample_rate_div, d); + if (ret) + return ret; + + /* start i2c master, wait for xfer, stop */ + user_ctrl = st->chip_config.user_ctrl | INV_MPU6050_BIT_I2C_MST_EN; + ret = regmap_write(st->map, st->reg->user_ctrl, user_ctrl); + if (ret) + return ret; + + /* need to wait 2 periods + half-period margin */ + period_ms = 1000 / INV_MPU_MAGN_FREQ_HZ_MAX; + msleep(period_ms * 2 + period_ms / 2); + user_ctrl = st->chip_config.user_ctrl; + ret = regmap_write(st->map, st->reg->user_ctrl, user_ctrl); + if (ret) + return ret; + + /* restore sample rate */ + d = st->chip_config.divider; + ret = regmap_write(st->map, st->reg->sample_rate_div, d); + if (ret) + return ret; + + /* check i2c status and read raw data */ + ret = regmap_read(st->map, INV_MPU6050_REG_I2C_MST_STATUS, &status); + if (ret) + return ret; + + if (status & INV_MPU6050_BIT_I2C_SLV0_NACK || + status & INV_MPU6050_BIT_I2C_SLV1_NACK) + return -EIO; + + ret = regmap_bulk_read(st->map, INV_MPU6050_REG_EXT_SENS_DATA, + data, sizeof(data)); + if (ret) + return ret; + + *val = (int16_t)be16_to_cpu(data[addr]); + + return IIO_VAL_INT; +} diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_magn.h b/drivers/iio/imu/inv_mpu6050/inv_mpu_magn.h new file mode 100644 index 000000000000..b41bd0578478 --- /dev/null +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_magn.h @@ -0,0 +1,36 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2019 TDK-InvenSense, Inc. + */ + +#ifndef INV_MPU_MAGN_H_ +#define INV_MPU_MAGN_H_ + +#include + +#include "inv_mpu_iio.h" + +int inv_mpu_magn_probe(struct inv_mpu6050_state *st); + +/** + * inv_mpu_magn_get_scale() - get magnetometer scale value + * @st: driver internal state + * + * Returns IIO data format. + */ +static inline int inv_mpu_magn_get_scale(const struct inv_mpu6050_state *st, + const struct iio_chan_spec *chan, + int *val, int *val2) +{ + *val = 0; + *val2 = st->magn_raw_to_gauss[chan->address]; + return IIO_VAL_INT_PLUS_MICRO; +} + +int inv_mpu_magn_set_rate(const struct inv_mpu6050_state *st, int fifo_rate); + +int inv_mpu_magn_set_orient(struct inv_mpu6050_state *st); + +int inv_mpu_magn_read(const struct inv_mpu6050_state *st, int axis, int *val); + +#endif /* INV_MPU_MAGN_H_ */ From e764fb4e20f9387d6a852cabf227f853f8e51bbe Mon Sep 17 00:00:00 2001 From: Jean-Baptiste Maneyrol Date: Mon, 16 Sep 2019 09:42:09 +0000 Subject: [PATCH 22/41] iio: imu: inv_mpu6050: add fifo support for magnetometer data Put read magnetometer data by mpu inside the fifo. Signed-off-by: Jean-Baptiste Maneyrol Signed-off-by: Jonathan Cameron --- drivers/iio/imu/inv_mpu6050/inv_mpu_core.c | 1 + drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h | 2 + drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c | 11 ++- drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c | 86 ++++++++++++++++--- 4 files changed, 88 insertions(+), 12 deletions(-) diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c index f1c65e0dd1a5..354030e9bed5 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c @@ -104,6 +104,7 @@ static const struct inv_mpu6050_chip_config chip_config_6050 = { .divider = INV_MPU6050_FIFO_RATE_TO_DIVIDER(INV_MPU6050_INIT_FIFO_RATE), .gyro_fifo_enable = false, .accl_fifo_enable = false, + .magn_fifo_enable = false, .accl_fs = INV_MPU6050_FS_02G, .user_ctrl = 0, }; diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h index 953f85618199..52fcf45050a5 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h @@ -86,6 +86,7 @@ enum inv_devices { * @accl_fs: accel full scale range. * @accl_fifo_enable: enable accel data output * @gyro_fifo_enable: enable gyro data output + * @magn_fifo_enable: enable magn data output * @divider: chip sample rate divider (sample rate divider - 1) */ struct inv_mpu6050_chip_config { @@ -94,6 +95,7 @@ struct inv_mpu6050_chip_config { unsigned int accl_fs:2; unsigned int accl_fifo_enable:1; unsigned int gyro_fifo_enable:1; + unsigned int magn_fifo_enable:1; u8 divider; u8 user_ctrl; }; diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c index 5f9a5de0bab4..bbf68b474556 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c @@ -124,7 +124,8 @@ int inv_reset_fifo(struct iio_dev *indio_dev) /* enable interrupt */ if (st->chip_config.accl_fifo_enable || - st->chip_config.gyro_fifo_enable) { + st->chip_config.gyro_fifo_enable || + st->chip_config.magn_fifo_enable) { result = regmap_write(st->map, st->reg->int_enable, INV_MPU6050_BIT_DATA_RDY_EN); if (result) @@ -141,6 +142,8 @@ int inv_reset_fifo(struct iio_dev *indio_dev) d |= INV_MPU6050_BITS_GYRO_OUT; if (st->chip_config.accl_fifo_enable) d |= INV_MPU6050_BIT_ACCEL_OUT; + if (st->chip_config.magn_fifo_enable) + d |= INV_MPU6050_BIT_SLAVE_0; result = regmap_write(st->map, st->reg->fifo_en, d); if (result) goto reset_fifo_fail; @@ -190,7 +193,8 @@ irqreturn_t inv_mpu6050_read_fifo(int irq, void *p) } if (!(st->chip_config.accl_fifo_enable | - st->chip_config.gyro_fifo_enable)) + st->chip_config.gyro_fifo_enable | + st->chip_config.magn_fifo_enable)) goto end_session; bytes_per_datum = 0; if (st->chip_config.accl_fifo_enable) @@ -202,6 +206,9 @@ irqreturn_t inv_mpu6050_read_fifo(int irq, void *p) if (st->chip_type == INV_ICM20602) bytes_per_datum += INV_ICM20602_BYTES_PER_TEMP_SENSOR; + if (st->chip_config.magn_fifo_enable) + bytes_per_datum += INV_MPU9X50_BYTES_MAGN; + /* * read fifo_count register to know how many bytes are inside the FIFO * right now diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c index dd55e70b6f77..d7d951927a44 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c @@ -5,7 +5,7 @@ #include "inv_mpu_iio.h" -static void inv_scan_query(struct iio_dev *indio_dev) +static void inv_scan_query_mpu6050(struct iio_dev *indio_dev) { struct inv_mpu6050_state *st = iio_priv(indio_dev); @@ -26,6 +26,60 @@ static void inv_scan_query(struct iio_dev *indio_dev) indio_dev->active_scan_mask); } +static void inv_scan_query_mpu9x50(struct iio_dev *indio_dev) +{ + struct inv_mpu6050_state *st = iio_priv(indio_dev); + + inv_scan_query_mpu6050(indio_dev); + + /* no magnetometer if i2c auxiliary bus is used */ + if (st->magn_disabled) + return; + + st->chip_config.magn_fifo_enable = + test_bit(INV_MPU9X50_SCAN_MAGN_X, + indio_dev->active_scan_mask) || + test_bit(INV_MPU9X50_SCAN_MAGN_Y, + indio_dev->active_scan_mask) || + test_bit(INV_MPU9X50_SCAN_MAGN_Z, + indio_dev->active_scan_mask); +} + +static void inv_scan_query(struct iio_dev *indio_dev) +{ + struct inv_mpu6050_state *st = iio_priv(indio_dev); + + switch (st->chip_type) { + case INV_MPU9250: + case INV_MPU9255: + return inv_scan_query_mpu9x50(indio_dev); + default: + return inv_scan_query_mpu6050(indio_dev); + } +} + +static unsigned int inv_compute_skip_samples(const struct inv_mpu6050_state *st) +{ + unsigned int gyro_skip = 0; + unsigned int magn_skip = 0; + unsigned int skip_samples; + + /* gyro first sample is out of specs, skip it */ + if (st->chip_config.gyro_fifo_enable) + gyro_skip = 1; + + /* mag first sample is always not ready, skip it */ + if (st->chip_config.magn_fifo_enable) + magn_skip = 1; + + /* compute first samples to skip */ + skip_samples = gyro_skip; + if (magn_skip > skip_samples) + skip_samples = magn_skip; + + return skip_samples; +} + /** * inv_mpu6050_set_enable() - enable chip functions. * @indio_dev: Device driver instance. @@ -34,6 +88,7 @@ static void inv_scan_query(struct iio_dev *indio_dev) static int inv_mpu6050_set_enable(struct iio_dev *indio_dev, bool enable) { struct inv_mpu6050_state *st = iio_priv(indio_dev); + uint8_t d; int result; if (enable) { @@ -41,14 +96,11 @@ static int inv_mpu6050_set_enable(struct iio_dev *indio_dev, bool enable) if (result) return result; inv_scan_query(indio_dev); - st->skip_samples = 0; if (st->chip_config.gyro_fifo_enable) { result = inv_mpu6050_switch_engine(st, true, INV_MPU6050_BIT_PWR_GYRO_STBY); if (result) goto error_power_off; - /* gyro first sample is out of specs, skip it */ - st->skip_samples = 1; } if (st->chip_config.accl_fifo_enable) { result = inv_mpu6050_switch_engine(st, true, @@ -56,22 +108,32 @@ static int inv_mpu6050_set_enable(struct iio_dev *indio_dev, bool enable) if (result) goto error_gyro_off; } + if (st->chip_config.magn_fifo_enable) { + d = st->chip_config.user_ctrl | + INV_MPU6050_BIT_I2C_MST_EN; + result = regmap_write(st->map, st->reg->user_ctrl, d); + if (result) + goto error_accl_off; + st->chip_config.user_ctrl = d; + } + st->skip_samples = inv_compute_skip_samples(st); result = inv_reset_fifo(indio_dev); if (result) - goto error_accl_off; + goto error_magn_off; } else { result = regmap_write(st->map, st->reg->fifo_en, 0); if (result) - goto error_accl_off; + goto error_magn_off; result = regmap_write(st->map, st->reg->int_enable, 0); if (result) - goto error_accl_off; + goto error_magn_off; - result = regmap_write(st->map, st->reg->user_ctrl, - st->chip_config.user_ctrl); + d = st->chip_config.user_ctrl & ~INV_MPU6050_BIT_I2C_MST_EN; + result = regmap_write(st->map, st->reg->user_ctrl, d); if (result) - goto error_accl_off; + goto error_magn_off; + st->chip_config.user_ctrl = d; result = inv_mpu6050_switch_engine(st, false, INV_MPU6050_BIT_PWR_ACCL_STBY); @@ -90,6 +152,10 @@ static int inv_mpu6050_set_enable(struct iio_dev *indio_dev, bool enable) return 0; +error_magn_off: + /* always restore user_ctrl to disable fifo properly */ + st->chip_config.user_ctrl &= ~INV_MPU6050_BIT_I2C_MST_EN; + regmap_write(st->map, st->reg->user_ctrl, st->chip_config.user_ctrl); error_accl_off: if (st->chip_config.accl_fifo_enable) inv_mpu6050_switch_engine(st, false, From 6ee6a368ac0ad48dd5c5eca0e02739ac932a5b21 Mon Sep 17 00:00:00 2001 From: Sean Nyekjaer Date: Mon, 16 Sep 2019 15:56:26 +0200 Subject: [PATCH 23/41] iio: imu: st_lsm6dsx: move interrupt thread to core This prepares the interrupt to be used for other stuff than fifo reading + event readings. Signed-off-by: Sean Nyekjaer Acked-by: Lorenzo Bianconi Reviewed-by: Lorenzo Bianconi Signed-off-by: Jonathan Cameron --- .../iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c | 78 +--------------- drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c | 88 +++++++++++++++++++ 2 files changed, 89 insertions(+), 77 deletions(-) diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c index b0f3da1976e4..ef579650fd52 100644 --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c @@ -30,8 +30,6 @@ * Denis Ciocca */ #include -#include -#include #include #include #include @@ -42,10 +40,6 @@ #include "st_lsm6dsx.h" -#define ST_LSM6DSX_REG_HLACTIVE_ADDR 0x12 -#define ST_LSM6DSX_REG_HLACTIVE_MASK BIT(5) -#define ST_LSM6DSX_REG_PP_OD_ADDR 0x12 -#define ST_LSM6DSX_REG_PP_OD_MASK BIT(4) #define ST_LSM6DSX_REG_FIFO_MODE_ADDR 0x0a #define ST_LSM6DSX_FIFO_MODE_MASK GENMASK(2, 0) #define ST_LSM6DSX_FIFO_ODR_MASK GENMASK(6, 3) @@ -654,25 +648,6 @@ out: return err; } -static irqreturn_t st_lsm6dsx_handler_irq(int irq, void *private) -{ - struct st_lsm6dsx_hw *hw = private; - - return hw->sip > 0 ? IRQ_WAKE_THREAD : IRQ_NONE; -} - -static irqreturn_t st_lsm6dsx_handler_thread(int irq, void *private) -{ - struct st_lsm6dsx_hw *hw = private; - int count; - - mutex_lock(&hw->fifo_lock); - count = hw->settings->fifo_ops.read_fifo(hw); - mutex_unlock(&hw->fifo_lock); - - return count ? IRQ_HANDLED : IRQ_NONE; -} - static int st_lsm6dsx_buffer_preenable(struct iio_dev *iio_dev) { struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev); @@ -702,59 +677,8 @@ static const struct iio_buffer_setup_ops st_lsm6dsx_buffer_ops = { int st_lsm6dsx_fifo_setup(struct st_lsm6dsx_hw *hw) { - struct device_node *np = hw->dev->of_node; - struct st_sensors_platform_data *pdata; struct iio_buffer *buffer; - unsigned long irq_type; - bool irq_active_low; - int i, err; - - irq_type = irqd_get_trigger_type(irq_get_irq_data(hw->irq)); - - switch (irq_type) { - case IRQF_TRIGGER_HIGH: - case IRQF_TRIGGER_RISING: - irq_active_low = false; - break; - case IRQF_TRIGGER_LOW: - case IRQF_TRIGGER_FALLING: - irq_active_low = true; - break; - default: - dev_info(hw->dev, "mode %lx unsupported\n", irq_type); - return -EINVAL; - } - - err = regmap_update_bits(hw->regmap, ST_LSM6DSX_REG_HLACTIVE_ADDR, - ST_LSM6DSX_REG_HLACTIVE_MASK, - FIELD_PREP(ST_LSM6DSX_REG_HLACTIVE_MASK, - irq_active_low)); - if (err < 0) - return err; - - pdata = (struct st_sensors_platform_data *)hw->dev->platform_data; - if ((np && of_property_read_bool(np, "drive-open-drain")) || - (pdata && pdata->open_drain)) { - err = regmap_update_bits(hw->regmap, ST_LSM6DSX_REG_PP_OD_ADDR, - ST_LSM6DSX_REG_PP_OD_MASK, - FIELD_PREP(ST_LSM6DSX_REG_PP_OD_MASK, - 1)); - if (err < 0) - return err; - - irq_type |= IRQF_SHARED; - } - - err = devm_request_threaded_irq(hw->dev, hw->irq, - st_lsm6dsx_handler_irq, - st_lsm6dsx_handler_thread, - irq_type | IRQF_ONESHOT, - "lsm6dsx", hw); - if (err) { - dev_err(hw->dev, "failed to request trigger irq %d\n", - hw->irq); - return err; - } + int i; for (i = 0; i < ST_LSM6DSX_ID_MAX; i++) { if (!hw->iio_devs[i]) diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c index b65a6ca775e0..ef838206b30f 100644 --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c @@ -50,6 +50,8 @@ #include #include #include +#include +#include #include #include #include @@ -65,6 +67,11 @@ #define ST_LSM6DSX_REG_BDU_ADDR 0x12 #define ST_LSM6DSX_REG_BDU_MASK BIT(6) +#define ST_LSM6DSX_REG_HLACTIVE_ADDR 0x12 +#define ST_LSM6DSX_REG_HLACTIVE_MASK BIT(5) +#define ST_LSM6DSX_REG_PP_OD_ADDR 0x12 +#define ST_LSM6DSX_REG_PP_OD_MASK BIT(4) + static const struct iio_chan_spec st_lsm6dsx_acc_channels[] = { ST_LSM6DSX_CHANNEL(IIO_ACCEL, 0x28, IIO_MOD_X, 0), ST_LSM6DSX_CHANNEL(IIO_ACCEL, 0x2a, IIO_MOD_Y, 1), @@ -1525,6 +1532,83 @@ static struct iio_dev *st_lsm6dsx_alloc_iiodev(struct st_lsm6dsx_hw *hw, return iio_dev; } +static irqreturn_t st_lsm6dsx_handler_irq(int irq, void *private) +{ + struct st_lsm6dsx_hw *hw = private; + + return hw->sip > 0 ? IRQ_WAKE_THREAD : IRQ_NONE; +} + +static irqreturn_t st_lsm6dsx_handler_thread(int irq, void *private) +{ + struct st_lsm6dsx_hw *hw = private; + int count; + + mutex_lock(&hw->fifo_lock); + count = hw->settings->fifo_ops.read_fifo(hw); + mutex_unlock(&hw->fifo_lock); + + return count ? IRQ_HANDLED : IRQ_NONE; +} + +static int st_lsm6dsx_irq_setup(struct st_lsm6dsx_hw *hw) +{ + struct st_sensors_platform_data *pdata; + struct device_node *np = hw->dev->of_node; + unsigned long irq_type; + bool irq_active_low; + int err; + + irq_type = irqd_get_trigger_type(irq_get_irq_data(hw->irq)); + + switch (irq_type) { + case IRQF_TRIGGER_HIGH: + case IRQF_TRIGGER_RISING: + irq_active_low = false; + break; + case IRQF_TRIGGER_LOW: + case IRQF_TRIGGER_FALLING: + irq_active_low = true; + break; + default: + dev_info(hw->dev, "mode %lx unsupported\n", irq_type); + return -EINVAL; + } + + err = regmap_update_bits(hw->regmap, ST_LSM6DSX_REG_HLACTIVE_ADDR, + ST_LSM6DSX_REG_HLACTIVE_MASK, + FIELD_PREP(ST_LSM6DSX_REG_HLACTIVE_MASK, + irq_active_low)); + if (err < 0) + return err; + + pdata = (struct st_sensors_platform_data *)hw->dev->platform_data; + if ((np && of_property_read_bool(np, "drive-open-drain")) || + (pdata && pdata->open_drain)) { + err = regmap_update_bits(hw->regmap, ST_LSM6DSX_REG_PP_OD_ADDR, + ST_LSM6DSX_REG_PP_OD_MASK, + FIELD_PREP(ST_LSM6DSX_REG_PP_OD_MASK, + 1)); + if (err < 0) + return err; + + irq_type |= IRQF_SHARED; + } + + err = devm_request_threaded_irq(hw->dev, hw->irq, + st_lsm6dsx_handler_irq, + st_lsm6dsx_handler_thread, + irq_type | IRQF_ONESHOT, + "lsm6dsx", hw); + if (err) { + dev_err(hw->dev, "failed to request trigger irq %d\n", + hw->irq); + return err; + } + + return 0; +} + int st_lsm6dsx_probe(struct device *dev, int irq, int hw_id, struct regmap *regmap) { @@ -1573,6 +1657,10 @@ int st_lsm6dsx_probe(struct device *dev, int irq, int hw_id, } if (hw->irq > 0) { + err = st_lsm6dsx_irq_setup(hw); + if (err < 0) + return err; + err = st_lsm6dsx_fifo_setup(hw); if (err < 0) return err; From b5969abfa8b8ed43ebd93479d394f664bd4a5a87 Mon Sep 17 00:00:00 2001 From: Sean Nyekjaer Date: Mon, 16 Sep 2019 15:56:27 +0200 Subject: [PATCH 24/41] iio: imu: st_lsm6dsx: add motion events Add event channels that controls the creation of motion events. Tested on ISM330DLC Signed-off-by: Sean Nyekjaer Reviewed-by: Lorenzo Bianconi Signed-off-by: Jonathan Cameron --- drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h | 41 ++++ drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c | 191 ++++++++++++++++++- 2 files changed, 228 insertions(+), 4 deletions(-) diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h index 21d14072d1c6..6b0ba48394eb 100644 --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h @@ -12,6 +12,7 @@ #define ST_LSM6DSX_H #include +#include #define ST_LSM6DS3_DEV_NAME "lsm6ds3" #define ST_LSM6DS3H_DEV_NAME "lsm6ds3h" @@ -54,6 +55,26 @@ enum st_lsm6dsx_hw_id { * ST_LSM6DSX_TAGGED_SAMPLE_SIZE) #define ST_LSM6DSX_SHIFT_VAL(val, mask) (((val) << __ffs(mask)) & (mask)) +#define ST_LSM6DSX_CHANNEL_ACC(chan_type, addr, mod, scan_idx) \ +{ \ + .type = chan_type, \ + .address = addr, \ + .modified = 1, \ + .channel2 = mod, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ + .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \ + .scan_index = scan_idx, \ + .scan_type = { \ + .sign = 's', \ + .realbits = 16, \ + .storagebits = 16, \ + .endianness = IIO_LE, \ + }, \ + .event_spec = &st_lsm6dsx_event, \ + .num_event_specs = 1, \ +} + #define ST_LSM6DSX_CHANNEL(chan_type, addr, mod, scan_idx) \ { \ .type = chan_type, \ @@ -162,6 +183,11 @@ struct st_lsm6dsx_shub_settings { u8 batch_en; }; +struct st_lsm6dsx_event_settings { + struct st_lsm6dsx_reg enable_reg; + struct st_lsm6dsx_reg wakeup_reg; +}; + enum st_lsm6dsx_ext_sensor_id { ST_LSM6DSX_ID_MAGN, }; @@ -225,6 +251,9 @@ struct st_lsm6dsx_settings { u8 wai; u8 int1_addr; u8 int2_addr; + u8 int1_func_addr; + u8 int2_func_addr; + u8 int_func_mask; u8 reset_addr; u16 max_fifo_size; struct { @@ -244,6 +273,7 @@ struct st_lsm6dsx_settings { struct st_lsm6dsx_fifo_ops fifo_ops; struct st_lsm6dsx_hw_ts_settings ts_settings; struct st_lsm6dsx_shub_settings shub_settings; + struct st_lsm6dsx_event_settings event_settings; }; enum st_lsm6dsx_sensor_id { @@ -324,6 +354,10 @@ struct st_lsm6dsx_hw { u8 ts_sip; u8 sip; + u8 event_threshold; + u8 enable_event; + struct st_lsm6dsx_reg irq_routing; + u8 *buff; struct iio_dev *iio_devs[ST_LSM6DSX_ID_MAX]; @@ -331,6 +365,13 @@ struct st_lsm6dsx_hw { const struct st_lsm6dsx_settings *settings; }; +static const struct iio_event_spec st_lsm6dsx_event = { + .type = IIO_EV_TYPE_THRESH, + .dir = IIO_EV_DIR_EITHER, + .mask_separate = BIT(IIO_EV_INFO_VALUE) | + BIT(IIO_EV_INFO_ENABLE) +}; + static const unsigned long st_lsm6dsx_available_scan_masks[] = {0x7, 0x0}; extern const struct dev_pm_ops st_lsm6dsx_pm_ops; diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c index ef838206b30f..806935c8f033 100644 --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c @@ -73,9 +73,9 @@ #define ST_LSM6DSX_REG_PP_OD_MASK BIT(4) static const struct iio_chan_spec st_lsm6dsx_acc_channels[] = { - ST_LSM6DSX_CHANNEL(IIO_ACCEL, 0x28, IIO_MOD_X, 0), - ST_LSM6DSX_CHANNEL(IIO_ACCEL, 0x2a, IIO_MOD_Y, 1), - ST_LSM6DSX_CHANNEL(IIO_ACCEL, 0x2c, IIO_MOD_Z, 2), + ST_LSM6DSX_CHANNEL_ACC(IIO_ACCEL, 0x28, IIO_MOD_X, 0), + ST_LSM6DSX_CHANNEL_ACC(IIO_ACCEL, 0x2a, IIO_MOD_Y, 1), + ST_LSM6DSX_CHANNEL_ACC(IIO_ACCEL, 0x2c, IIO_MOD_Z, 2), IIO_CHAN_SOFT_TIMESTAMP(3), }; @@ -168,6 +168,9 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = { .wai = 0x69, .int1_addr = 0x0d, .int2_addr = 0x0e, + .int1_func_addr = 0x5e, + .int2_func_addr = 0x5f, + .int_func_mask = BIT(5), .reset_addr = 0x12, .max_fifo_size = 1365, .id = { @@ -279,11 +282,20 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = { .mask = GENMASK(5, 3), }, }, + .event_settings = { + .wakeup_reg = { + .addr = 0x5B, + .mask = GENMASK(5, 0), + }, + }, }, { .wai = 0x69, .int1_addr = 0x0d, .int2_addr = 0x0e, + .int1_func_addr = 0x5e, + .int2_func_addr = 0x5f, + .int_func_mask = BIT(5), .reset_addr = 0x12, .max_fifo_size = 682, .id = { @@ -395,11 +407,20 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = { .mask = GENMASK(5, 3), }, }, + .event_settings = { + .wakeup_reg = { + .addr = 0x5B, + .mask = GENMASK(5, 0), + }, + }, }, { .wai = 0x6a, .int1_addr = 0x0d, .int2_addr = 0x0e, + .int1_func_addr = 0x5e, + .int2_func_addr = 0x5f, + .int_func_mask = BIT(5), .reset_addr = 0x12, .max_fifo_size = 682, .id = { @@ -520,6 +541,16 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = { .mask = GENMASK(5, 3), }, }, + .event_settings = { + .enable_reg = { + .addr = 0x58, + .mask = BIT(7), + }, + .wakeup_reg = { + .addr = 0x5B, + .mask = GENMASK(5, 0), + }, + }, }, { .wai = 0x6c, @@ -666,6 +697,9 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = { .wai = 0x6b, .int1_addr = 0x0d, .int2_addr = 0x0e, + .int1_func_addr = 0x5e, + .int2_func_addr = 0x5f, + .int_func_mask = BIT(5), .reset_addr = 0x12, .max_fifo_size = 512, .id = { @@ -773,11 +807,24 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = { .mask = GENMASK(7, 6), }, }, + .event_settings = { + .enable_reg = { + .addr = 0x58, + .mask = BIT(7), + }, + .wakeup_reg = { + .addr = 0x5B, + .mask = GENMASK(5, 0), + }, + }, }, { .wai = 0x6b, .int1_addr = 0x0d, .int2_addr = 0x0e, + .int1_func_addr = 0x5e, + .int2_func_addr = 0x5f, + .int_func_mask = BIT(5), .reset_addr = 0x12, .max_fifo_size = 512, .id = { @@ -913,6 +960,16 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = { .slv0_addr = 0x15, .dw_slv0_addr = 0x21, .batch_en = BIT(3), + }, + .event_settings = { + .enable_reg = { + .addr = 0x58, + .mask = BIT(7), + }, + .wakeup_reg = { + .addr = 0x5B, + .mask = GENMASK(5, 0), + }, } }, }; @@ -1119,7 +1176,8 @@ static int st_lsm6dsx_read_oneshot(struct st_lsm6dsx_sensor *sensor, if (err < 0) return err; - st_lsm6dsx_sensor_set_enable(sensor, false); + if (!hw->enable_event) + st_lsm6dsx_sensor_set_enable(sensor, false); *val = (s16)le16_to_cpu(data); @@ -1192,6 +1250,123 @@ static int st_lsm6dsx_write_raw(struct iio_dev *iio_dev, return err; } +static int st_lsm6dsx_event_setup(struct st_lsm6dsx_hw *hw, int state) +{ + int err; + u8 enable = 0; + + if (!hw->settings->int1_func_addr) + return -ENOTSUPP; + + enable = state ? hw->settings->event_settings.enable_reg.mask : 0; + + err = regmap_update_bits(hw->regmap, + hw->settings->event_settings.enable_reg.addr, + hw->settings->event_settings.enable_reg.mask, + enable); + if (err < 0) + return err; + + enable = state ? hw->irq_routing.mask : 0; + + /* Enable wakeup interrupt */ + return regmap_update_bits(hw->regmap, hw->irq_routing.addr, + hw->irq_routing.mask, + enable); +} + +static int st_lsm6dsx_read_event(struct iio_dev *iio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + enum iio_event_info info, + int *val, int *val2) +{ + struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev); + struct st_lsm6dsx_hw *hw = sensor->hw; + + if (type != IIO_EV_TYPE_THRESH) + return -EINVAL; + + *val2 = 0; + *val = hw->event_threshold; + + return IIO_VAL_INT; +} + +static int st_lsm6dsx_write_event(struct iio_dev *iio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + enum iio_event_info info, + int val, int val2) +{ + struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev); + struct st_lsm6dsx_hw *hw = sensor->hw; + int err; + + if (type != IIO_EV_TYPE_THRESH) + return -EINVAL; + + if (val < 0 || val > 31) + return -EINVAL; + + err = regmap_update_bits(hw->regmap, + hw->settings->event_settings.wakeup_reg.addr, + hw->settings->event_settings.wakeup_reg.mask, + val); + if (err) + return -EINVAL; + + hw->event_threshold = val; + + return 0; +} + +static int st_lsm6dsx_read_event_config(struct iio_dev *iio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir) +{ + struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev); + struct st_lsm6dsx_hw *hw = sensor->hw; + + if (type != IIO_EV_TYPE_THRESH) + return -EINVAL; + + return hw->enable_event; +} + +static int st_lsm6dsx_write_event_config(struct iio_dev *iio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + int state) +{ + struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev); + struct st_lsm6dsx_hw *hw = sensor->hw; + int err = 0; + + if (type != IIO_EV_TYPE_THRESH) + return -EINVAL; + + /* do not enable events if they are already enabled */ + if (state && hw->enable_event) + return 0; + + err = st_lsm6dsx_event_setup(hw, state); + if (err < 0) + return err; + + err = st_lsm6dsx_sensor_set_enable(sensor, state); + if (err < 0) + return err; + + hw->enable_event = state; + + return 0; +} + int st_lsm6dsx_set_watermark(struct iio_dev *iio_dev, unsigned int val) { struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev); @@ -1276,6 +1451,10 @@ static const struct iio_info st_lsm6dsx_acc_info = { .attrs = &st_lsm6dsx_acc_attribute_group, .read_raw = st_lsm6dsx_read_raw, .write_raw = st_lsm6dsx_write_raw, + .read_event_value = st_lsm6dsx_read_event, + .write_event_value = st_lsm6dsx_write_event, + .read_event_config = st_lsm6dsx_read_event_config, + .write_event_config = st_lsm6dsx_write_event_config, .hwfifo_set_watermark = st_lsm6dsx_set_watermark, }; @@ -1321,9 +1500,13 @@ static int st_lsm6dsx_get_drdy_reg(struct st_lsm6dsx_hw *hw, u8 *drdy_reg) switch (drdy_pin) { case 1: *drdy_reg = hw->settings->int1_addr; + hw->irq_routing.addr = hw->settings->int1_func_addr; + hw->irq_routing.mask = hw->settings->int_func_mask; break; case 2: *drdy_reg = hw->settings->int2_addr; + hw->irq_routing.addr = hw->settings->int2_func_addr; + hw->irq_routing.mask = hw->settings->int_func_mask; break; default: dev_err(hw->dev, "unsupported data ready pin\n"); From 4c997dfa692d8bdc9f2906057d17f1c61d5dcda2 Mon Sep 17 00:00:00 2001 From: Sean Nyekjaer Date: Mon, 16 Sep 2019 15:56:28 +0200 Subject: [PATCH 25/41] iio: imu: st_lsm6dsx: add wakeup-source option This add ways for the SoC to wake from accelerometer wake events. In the suspend function we skip disabling the sensor if wakeup-source and events are activated. Signed-off-by: Sean Nyekjaer Reviewed-by: Lorenzo Bianconi Signed-off-by: Jonathan Cameron --- drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c index 806935c8f033..dcac1314e769 100644 --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c @@ -1858,6 +1858,9 @@ int st_lsm6dsx_probe(struct device *dev, int irq, int hw_id, return err; } + if (dev->of_node && of_property_read_bool(dev->of_node, "wakeup-source")) + device_init_wakeup(dev, true); + return 0; } EXPORT_SYMBOL(st_lsm6dsx_probe); @@ -1876,6 +1879,13 @@ static int __maybe_unused st_lsm6dsx_suspend(struct device *dev) if (!(hw->enable_mask & BIT(sensor->id))) continue; + if (device_may_wakeup(dev) && + sensor->id == ST_LSM6DSX_ID_ACC && hw->enable_event) { + /* Enable wake from IRQ */ + enable_irq_wake(hw->irq); + continue; + } + if (sensor->id == ST_LSM6DSX_ID_EXT0 || sensor->id == ST_LSM6DSX_ID_EXT1 || sensor->id == ST_LSM6DSX_ID_EXT2) @@ -1905,6 +1915,10 @@ static int __maybe_unused st_lsm6dsx_resume(struct device *dev) continue; sensor = iio_priv(hw->iio_devs[i]); + if (device_may_wakeup(dev) && + sensor->id == ST_LSM6DSX_ID_ACC && hw->enable_event) + disable_irq_wake(hw->irq); + if (!(hw->suspend_mask & BIT(sensor->id))) continue; From a3aa17d4badf17c9cbe785f3c842c1b62f5b527d Mon Sep 17 00:00:00 2001 From: Sean Nyekjaer Date: Mon, 16 Sep 2019 15:56:29 +0200 Subject: [PATCH 26/41] iio: imu: st_lsm6dsx: always enter interrupt thread The interrupt source can come from multiple sources, fifo and wake interrupts. Enter interrupt thread to check which interrupt that has fired. Signed-off-by: Sean Nyekjaer Reviewed-by: Lorenzo Bianconi Signed-off-by: Jonathan Cameron --- drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c | 9 +-------- 1 file changed, 1 insertion(+), 8 deletions(-) diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c index dcac1314e769..26acc852982d 100644 --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c @@ -1715,13 +1715,6 @@ static struct iio_dev *st_lsm6dsx_alloc_iiodev(struct st_lsm6dsx_hw *hw, return iio_dev; } -static irqreturn_t st_lsm6dsx_handler_irq(int irq, void *private) -{ - struct st_lsm6dsx_hw *hw = private; - - return hw->sip > 0 ? IRQ_WAKE_THREAD : IRQ_NONE; -} - static irqreturn_t st_lsm6dsx_handler_thread(int irq, void *private) { struct st_lsm6dsx_hw *hw = private; @@ -1779,7 +1772,7 @@ static int st_lsm6dsx_irq_setup(struct st_lsm6dsx_hw *hw) } err = devm_request_threaded_irq(hw->dev, hw->irq, - st_lsm6dsx_handler_irq, + NULL, st_lsm6dsx_handler_thread, irq_type | IRQF_ONESHOT, "lsm6dsx", hw); From 1aabad1fb5e98aa5a7449e0d288b4886aca3ebda Mon Sep 17 00:00:00 2001 From: Sean Nyekjaer Date: Mon, 16 Sep 2019 15:56:30 +0200 Subject: [PATCH 27/41] iio: imu: st_lsm6dsx: add motion report function and call from interrupt Report iio motion events to iio subsystem and filter motion events. Wakeup will still be on all channels as it's not possible to do the filtering in hw. Signed-off-by: Sean Nyekjaer Reviewed-by: Lorenzo Bianconi Signed-off-by: Jonathan Cameron --- drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h | 5 + drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c | 97 +++++++++++++++++++- 2 files changed, 98 insertions(+), 4 deletions(-) diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h index 6b0ba48394eb..fd02d0e184f3 100644 --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h @@ -186,6 +186,11 @@ struct st_lsm6dsx_shub_settings { struct st_lsm6dsx_event_settings { struct st_lsm6dsx_reg enable_reg; struct st_lsm6dsx_reg wakeup_reg; + u8 wakeup_src_reg; + u8 wakeup_src_status_mask; + u8 wakeup_src_z_mask; + u8 wakeup_src_y_mask; + u8 wakeup_src_x_mask; }; enum st_lsm6dsx_ext_sensor_id { diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c index 26acc852982d..8a813ddba19c 100644 --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c @@ -48,6 +48,7 @@ #include #include #include +#include #include #include #include @@ -287,6 +288,11 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = { .addr = 0x5B, .mask = GENMASK(5, 0), }, + .wakeup_src_reg = 0x1b, + .wakeup_src_status_mask = BIT(3), + .wakeup_src_z_mask = BIT(0), + .wakeup_src_y_mask = BIT(1), + .wakeup_src_x_mask = BIT(2), }, }, { @@ -412,6 +418,11 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = { .addr = 0x5B, .mask = GENMASK(5, 0), }, + .wakeup_src_reg = 0x1b, + .wakeup_src_status_mask = BIT(3), + .wakeup_src_z_mask = BIT(0), + .wakeup_src_y_mask = BIT(1), + .wakeup_src_x_mask = BIT(2), }, }, { @@ -550,6 +561,11 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = { .addr = 0x5B, .mask = GENMASK(5, 0), }, + .wakeup_src_reg = 0x1b, + .wakeup_src_status_mask = BIT(3), + .wakeup_src_z_mask = BIT(0), + .wakeup_src_y_mask = BIT(1), + .wakeup_src_x_mask = BIT(2), }, }, { @@ -816,6 +832,11 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = { .addr = 0x5B, .mask = GENMASK(5, 0), }, + .wakeup_src_reg = 0x1b, + .wakeup_src_status_mask = BIT(3), + .wakeup_src_z_mask = BIT(0), + .wakeup_src_y_mask = BIT(1), + .wakeup_src_x_mask = BIT(2), }, }, { @@ -970,6 +991,11 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = { .addr = 0x5B, .mask = GENMASK(5, 0), }, + .wakeup_src_reg = 0x1b, + .wakeup_src_status_mask = BIT(3), + .wakeup_src_z_mask = BIT(0), + .wakeup_src_y_mask = BIT(1), + .wakeup_src_x_mask = BIT(2), } }, }; @@ -1334,7 +1360,7 @@ static int st_lsm6dsx_read_event_config(struct iio_dev *iio_dev, if (type != IIO_EV_TYPE_THRESH) return -EINVAL; - return hw->enable_event; + return !!(hw->enable_event & BIT(chan->channel2)); } static int st_lsm6dsx_write_event_config(struct iio_dev *iio_dev, @@ -1345,13 +1371,28 @@ static int st_lsm6dsx_write_event_config(struct iio_dev *iio_dev, { struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev); struct st_lsm6dsx_hw *hw = sensor->hw; + u8 enable_event; int err = 0; if (type != IIO_EV_TYPE_THRESH) return -EINVAL; - /* do not enable events if they are already enabled */ - if (state && hw->enable_event) + if (state) { + enable_event = hw->enable_event | BIT(chan->channel2); + + /* do not enable events if they are already enabled */ + if (hw->enable_event) + goto out; + } else { + enable_event = hw->enable_event & ~BIT(chan->channel2); + + /* only turn off sensor if no events is enabled */ + if (enable_event) + goto out; + } + + /* stop here if no changes have been made */ + if (hw->enable_event == enable_event) return 0; err = st_lsm6dsx_event_setup(hw, state); @@ -1362,7 +1403,8 @@ static int st_lsm6dsx_write_event_config(struct iio_dev *iio_dev, if (err < 0) return err; - hw->enable_event = state; +out: + hw->enable_event = enable_event; return 0; } @@ -1715,10 +1757,57 @@ static struct iio_dev *st_lsm6dsx_alloc_iiodev(struct st_lsm6dsx_hw *hw, return iio_dev; } +static void st_lsm6dsx_report_motion_event(struct st_lsm6dsx_hw *hw, int data) +{ + s64 timestamp = iio_get_time_ns(hw->iio_devs[ST_LSM6DSX_ID_ACC]); + + if ((data & hw->settings->event_settings.wakeup_src_z_mask) && + (hw->enable_event & BIT(IIO_MOD_Z))) + iio_push_event(hw->iio_devs[ST_LSM6DSX_ID_ACC], + IIO_MOD_EVENT_CODE(IIO_ACCEL, + 0, + IIO_MOD_Z, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_EITHER), + timestamp); + + if ((data & hw->settings->event_settings.wakeup_src_y_mask) && + (hw->enable_event & BIT(IIO_MOD_Y))) + iio_push_event(hw->iio_devs[ST_LSM6DSX_ID_ACC], + IIO_MOD_EVENT_CODE(IIO_ACCEL, + 0, + IIO_MOD_Y, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_EITHER), + timestamp); + + if ((data & hw->settings->event_settings.wakeup_src_x_mask) && + (hw->enable_event & BIT(IIO_MOD_X))) + iio_push_event(hw->iio_devs[ST_LSM6DSX_ID_ACC], + IIO_MOD_EVENT_CODE(IIO_ACCEL, + 0, + IIO_MOD_X, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_EITHER), + timestamp); +} + static irqreturn_t st_lsm6dsx_handler_thread(int irq, void *private) { struct st_lsm6dsx_hw *hw = private; int count; + int data, err; + + if (hw->enable_event) { + err = regmap_read(hw->regmap, + hw->settings->event_settings.wakeup_src_reg, + &data); + if (err < 0) + return IRQ_NONE; + + if (data & hw->settings->event_settings.wakeup_src_status_mask) + st_lsm6dsx_report_motion_event(hw, data); + } mutex_lock(&hw->fifo_lock); count = hw->settings->fifo_ops.read_fifo(hw); From 2231f0f0d1e999b68b8bb6df0407b306ebbcb542 Mon Sep 17 00:00:00 2001 From: Tomasz Duszynski Date: Mon, 16 Sep 2019 21:00:23 +0200 Subject: [PATCH 28/41] dt-bindings: iio: light: bh1750: convert bindings to yaml Convert existing device tree bindings to yaml. Signed-off-by: Tomasz Duszynski Reviewed-by: Rob Herring Signed-off-by: Jonathan Cameron --- .../devicetree/bindings/iio/light/bh1750.txt | 18 -------- .../devicetree/bindings/iio/light/bh1750.yaml | 43 +++++++++++++++++++ 2 files changed, 43 insertions(+), 18 deletions(-) delete mode 100644 Documentation/devicetree/bindings/iio/light/bh1750.txt create mode 100644 Documentation/devicetree/bindings/iio/light/bh1750.yaml diff --git a/Documentation/devicetree/bindings/iio/light/bh1750.txt b/Documentation/devicetree/bindings/iio/light/bh1750.txt deleted file mode 100644 index 1e7685797d7a..000000000000 --- a/Documentation/devicetree/bindings/iio/light/bh1750.txt +++ /dev/null @@ -1,18 +0,0 @@ -ROHM BH1750 - ALS, Ambient light sensor - -Required properties: - -- compatible: Must be one of: - "rohm,bh1710" - "rohm,bh1715" - "rohm,bh1721" - "rohm,bh1750" - "rohm,bh1751" -- reg: the I2C address of the sensor - -Example: - -light-sensor@23 { - compatible = "rohm,bh1750"; - reg = <0x23>; -}; diff --git a/Documentation/devicetree/bindings/iio/light/bh1750.yaml b/Documentation/devicetree/bindings/iio/light/bh1750.yaml new file mode 100644 index 000000000000..1cc60d7ecfa0 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/light/bh1750.yaml @@ -0,0 +1,43 @@ +# SPDX-License-Identifier: GPL-2.0 +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/light/bh1750.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: ROHM BH1750 ambient light sensor + +maintainers: + - Tomasz Duszynski + +description: | + Ambient light sensor with an i2c interface. + +properties: + compatible: + enum: + - rohm,bh1710 + - rohm,bh1715 + - rohm,bh1721 + - rohm,bh1750 + - rohm,bh1751 + + reg: + maxItems: 1 + +required: + - compatible + - reg + +examples: + - | + i2c { + #address-cells = <1>; + #size-cells = <0>; + + light-sensor@23 { + compatible = "rohm,bh1750"; + reg = <0x23>; + }; + }; + +... From 8033997a8dafbad1aae437bd25f0d7307fb084be Mon Sep 17 00:00:00 2001 From: Tomasz Duszynski Date: Mon, 16 Sep 2019 21:00:24 +0200 Subject: [PATCH 29/41] MAINTAINERS: add entry for ROHM BH1750 driver Add myself as a ROHM BH1750 ambient light sensor driver maintainer. Signed-off-by: Tomasz Duszynski Signed-off-by: Jonathan Cameron --- MAINTAINERS | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 8c71957ca9d8..4408fbd10e5d 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -13821,6 +13821,12 @@ L: linux-serial@vger.kernel.org S: Odd Fixes F: drivers/tty/serial/rp2.* +ROHM BH1750 AMBIENT LIGHT SENSOR DRIVER +M: Tomasz Duszynski +S: Maintained +F: drivers/iio/light/bh1750.c +F: Documentation/devicetree/bindings/iio/light/bh1750.yaml + ROHM MULTIFUNCTION BD9571MWV-M PMIC DEVICE DRIVERS M: Marek Vasut L: linux-kernel@vger.kernel.org From ea14163d29130649e43bfcad12ef6ef9a956fbe3 Mon Sep 17 00:00:00 2001 From: Alexandru Ardelean Date: Tue, 17 Sep 2019 19:10:23 +0300 Subject: [PATCH 30/41] iio: gyro: adis16130: remove mlock usage The use of indio_dev's mlock is discouraged. The driver already defines it's own `bus_lock` in `adis16130_spi_read()`, so using the mlock is redundant. The parts supported by this chip are obsoleted anyway, so for now we just remove mlock as part of a general cleanup, until the driver gets removed. Signed-off-by: Alexandru Ardelean Signed-off-by: Jonathan Cameron --- drivers/iio/gyro/adis16130.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/iio/gyro/adis16130.c b/drivers/iio/gyro/adis16130.c index de3f66f89496..79e63c8a2ea8 100644 --- a/drivers/iio/gyro/adis16130.c +++ b/drivers/iio/gyro/adis16130.c @@ -76,9 +76,7 @@ static int adis16130_read_raw(struct iio_dev *indio_dev, switch (mask) { case IIO_CHAN_INFO_RAW: /* Take the iio_dev status lock */ - mutex_lock(&indio_dev->mlock); ret = adis16130_spi_read(indio_dev, chan->address, &temp); - mutex_unlock(&indio_dev->mlock); if (ret) return ret; *val = temp; From 0f536e91099bea115b091377a3923ef233fab3e4 Mon Sep 17 00:00:00 2001 From: Fabrice Gasnier Date: Wed, 18 Sep 2019 14:22:03 +0200 Subject: [PATCH 31/41] counter: stm32-timer-cnt: fix a kernel-doc warning Fix the following warning when documentation is built: drivers/counter/stm32-timer-cnt.c:37: warning: cannot understand function prototype: 'enum stm32_count_function' Signed-off-by: Fabrice Gasnier Fixes: ad29937e206f ("counter: Add STM32 Timer quadrature encoder") Signed-off-by: Jonathan Cameron --- drivers/counter/stm32-timer-cnt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/counter/stm32-timer-cnt.c b/drivers/counter/stm32-timer-cnt.c index 644ba18a72ad..e425dd1e41fe 100644 --- a/drivers/counter/stm32-timer-cnt.c +++ b/drivers/counter/stm32-timer-cnt.c @@ -28,7 +28,7 @@ struct stm32_timer_cnt { }; /** - * stm32_count_function - enumerates stm32 timer counter encoder modes + * enum stm32_count_function - enumerates stm32 timer counter encoder modes * @STM32_COUNT_SLAVE_MODE_DISABLED: counts on internal clock when CEN=1 * @STM32_COUNT_ENCODER_MODE_1: counts TI1FP1 edges, depending on TI2FP2 level * @STM32_COUNT_ENCODER_MODE_2: counts TI2FP2 edges, depending on TI1FP1 level From 81ba7e85d7f3af053b06e8538f7c847587d53935 Mon Sep 17 00:00:00 2001 From: Fabrice Gasnier Date: Wed, 18 Sep 2019 14:22:41 +0200 Subject: [PATCH 32/41] counter: stm32-lptimer-cnt: fix a kernel-doc warning Fix the following warnings when documentation is built: drivers/counter/stm32-lptimer-cnt.c:354: warning: cannot understand function prototype: 'enum stm32_lptim_cnt_function' Signed-off-by: Fabrice Gasnier Fixes: 597f55e3f36c ("counter: stm32-lptimer: add counter device") Signed-off-by: Jonathan Cameron --- drivers/counter/stm32-lptimer-cnt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/counter/stm32-lptimer-cnt.c b/drivers/counter/stm32-lptimer-cnt.c index bbc930a5962c..28b63645c411 100644 --- a/drivers/counter/stm32-lptimer-cnt.c +++ b/drivers/counter/stm32-lptimer-cnt.c @@ -347,7 +347,7 @@ static const struct iio_chan_spec stm32_lptim_cnt_channels = { }; /** - * stm32_lptim_cnt_function - enumerates stm32 LPTimer counter & encoder modes + * enum stm32_lptim_cnt_function - enumerates LPTimer counter & encoder modes * @STM32_LPTIM_COUNTER_INCREASE: up count on IN1 rising, falling or both edges * @STM32_LPTIM_ENCODER_BOTH_EDGE: count on both edges (IN1 & IN2 quadrature) */ From 9318a9e547438078104b0e8557f76f0cb524c12e Mon Sep 17 00:00:00 2001 From: Alexandru Ardelean Date: Thu, 19 Sep 2019 16:23:03 +0300 Subject: [PATCH 33/41] iio: gyro: adis16080: replace mlock with own lock The lock is used to protect the buffer during reads. Though the spi routines have their own locks, it may be the case that the buffer needs to be protected before it's stored and passed to the IIO read hooks. indio_dev's mlock was used before. This change replaces it with the driver's own lock. Signed-off-by: Alexandru Ardelean Signed-off-by: Jonathan Cameron --- drivers/iio/gyro/adis16080.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/iio/gyro/adis16080.c b/drivers/iio/gyro/adis16080.c index 236220d6de02..1b84b8e112fe 100644 --- a/drivers/iio/gyro/adis16080.c +++ b/drivers/iio/gyro/adis16080.c @@ -38,10 +38,12 @@ struct adis16080_chip_info { * @us: actual spi_device to write data * @info: chip specific parameters * @buf: transmit or receive buffer + * @lock lock to protect buffer during reads **/ struct adis16080_state { struct spi_device *us; const struct adis16080_chip_info *info; + struct mutex lock; __be16 buf ____cacheline_aligned; }; @@ -82,9 +84,9 @@ static int adis16080_read_raw(struct iio_dev *indio_dev, switch (mask) { case IIO_CHAN_INFO_RAW: - mutex_lock(&indio_dev->mlock); + mutex_lock(&st->lock); ret = adis16080_read_sample(indio_dev, chan->address, val); - mutex_unlock(&indio_dev->mlock); + mutex_unlock(&st->lock); return ret ? ret : IIO_VAL_INT; case IIO_CHAN_INFO_SCALE: switch (chan->type) { @@ -196,6 +198,8 @@ static int adis16080_probe(struct spi_device *spi) /* this is only used for removal purposes */ spi_set_drvdata(spi, indio_dev); + mutex_init(&st->lock); + /* Allocate the comms buffers */ st->us = spi; st->info = &adis16080_chip_info[id->driver_data]; From dc7fe512d9667bce878797cd2fd39acec08232bb Mon Sep 17 00:00:00 2001 From: Phil Reid Date: Thu, 19 Sep 2019 22:36:07 +0800 Subject: [PATCH 34/41] dt-binding: iio: Add optional label property This optional property defines a symbolic name for the device. This helps to distinguish between more than one iio device of the same type. Suggested-by: Michal Simek Signed-off-by: Phil Reid Reviewed-by: Rob Herring Signed-off-by: Jonathan Cameron --- Documentation/devicetree/bindings/iio/iio-bindings.txt | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/Documentation/devicetree/bindings/iio/iio-bindings.txt b/Documentation/devicetree/bindings/iio/iio-bindings.txt index 68d6f8ce063b..af33267727f4 100644 --- a/Documentation/devicetree/bindings/iio/iio-bindings.txt +++ b/Documentation/devicetree/bindings/iio/iio-bindings.txt @@ -18,12 +18,17 @@ Required properties: with a single IIO output and 1 for nodes with multiple IIO outputs. +Optional properties: +label: A symbolic name for the device. + + Example for a simple configuration with no trigger: adc: voltage-sensor@35 { compatible = "maxim,max1139"; reg = <0x35>; #io-channel-cells = <1>; + label = "voltage_feedback_group1"; }; Example for a configuration with trigger: From 2c3d0c9ffd24d9b4c62c5dfb2104695a614be28c Mon Sep 17 00:00:00 2001 From: Phil Reid Date: Thu, 19 Sep 2019 22:36:08 +0800 Subject: [PATCH 35/41] iio: core: Add optional symbolic label to device attributes If a label is defined in the device tree for this device add that to the device specific attributes. This is useful for userspace to be able to identify an individual device when multiple identical chips are present in the system. Tested-by: Michal Simek Signed-off-by: Phil Reid Signed-off-by: Jonathan Cameron --- drivers/iio/industrialio-core.c | 17 +++++++++++++++++ include/linux/iio/iio.h | 2 ++ 2 files changed, 19 insertions(+) diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c index 524a686077ca..f72c2dc5f703 100644 --- a/drivers/iio/industrialio-core.c +++ b/drivers/iio/industrialio-core.c @@ -1238,6 +1238,16 @@ static ssize_t iio_show_dev_name(struct device *dev, static DEVICE_ATTR(name, S_IRUGO, iio_show_dev_name, NULL); +static ssize_t iio_show_dev_label(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + return snprintf(buf, PAGE_SIZE, "%s\n", indio_dev->label); +} + +static DEVICE_ATTR(label, S_IRUGO, iio_show_dev_label, NULL); + static ssize_t iio_show_timestamp_clock(struct device *dev, struct device_attribute *attr, char *buf) @@ -1354,6 +1364,8 @@ static int iio_device_register_sysfs(struct iio_dev *indio_dev) if (indio_dev->name) attrcount++; + if (indio_dev->label) + attrcount++; if (clk) attrcount++; @@ -1376,6 +1388,8 @@ static int iio_device_register_sysfs(struct iio_dev *indio_dev) indio_dev->chan_attr_group.attrs[attrn++] = &p->dev_attr.attr; if (indio_dev->name) indio_dev->chan_attr_group.attrs[attrn++] = &dev_attr_name.attr; + if (indio_dev->label) + indio_dev->chan_attr_group.attrs[attrn++] = &dev_attr_label.attr; if (clk) indio_dev->chan_attr_group.attrs[attrn++] = clk; @@ -1647,6 +1661,9 @@ int __iio_device_register(struct iio_dev *indio_dev, struct module *this_mod) if (!indio_dev->dev.of_node && indio_dev->dev.parent) indio_dev->dev.of_node = indio_dev->dev.parent->of_node; + indio_dev->label = of_get_property(indio_dev->dev.of_node, "label", + NULL); + ret = iio_check_unique_scan_index(indio_dev); if (ret < 0) return ret; diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h index 8e132cf819e4..862ce0019eba 100644 --- a/include/linux/iio/iio.h +++ b/include/linux/iio/iio.h @@ -510,6 +510,7 @@ struct iio_buffer_setup_ops { * attributes * @chan_attr_group: [INTERN] group for all attrs in base directory * @name: [DRIVER] name of the device. + * @label: [DRIVER] unique name to identify which device this is * @info: [DRIVER] callbacks and constant info from driver * @clock_id: [INTERN] timestamping clock posix identifier * @info_exist_lock: [INTERN] lock to prevent use during removal @@ -553,6 +554,7 @@ struct iio_dev { struct list_head channel_attr_list; struct attribute_group chan_attr_group; const char *name; + const char *label; const struct iio_info *info; clockid_t clock_id; struct mutex info_exist_lock; From 3cfd6464fe23deb45bb688df66184b3f32fefc16 Mon Sep 17 00:00:00 2001 From: Alexandru Ardelean Date: Fri, 20 Sep 2019 11:35:13 +0300 Subject: [PATCH 36/41] iio: proximity: sx9500: fix iio_triggered_buffer_{predisable,postenable} positions The iio_triggered_buffer_predisable() should be called last, to detach the poll func after the devices has been suspended. This change re-organizes things a bit so that the postenable & predisable are symmetrical. It also converts the preenable() to a postenable(). Not stable material as there is no known problem with the current code, it's just not consistent with the form we would like all the IIO drivers to adopt so as to allow subsystem wide changes. Signed-off-by: Alexandru Ardelean Signed-off-by: Jonathan Cameron --- drivers/iio/proximity/sx9500.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-) diff --git a/drivers/iio/proximity/sx9500.c b/drivers/iio/proximity/sx9500.c index 612f79c53cfc..287d288e40c2 100644 --- a/drivers/iio/proximity/sx9500.c +++ b/drivers/iio/proximity/sx9500.c @@ -675,11 +675,15 @@ out: return IRQ_HANDLED; } -static int sx9500_buffer_preenable(struct iio_dev *indio_dev) +static int sx9500_buffer_postenable(struct iio_dev *indio_dev) { struct sx9500_data *data = iio_priv(indio_dev); int ret = 0, i; + ret = iio_triggered_buffer_postenable(indio_dev); + if (ret) + return ret; + mutex_lock(&data->mutex); for (i = 0; i < SX9500_NUM_CHANNELS; i++) @@ -696,6 +700,9 @@ static int sx9500_buffer_preenable(struct iio_dev *indio_dev) mutex_unlock(&data->mutex); + if (ret) + iio_triggered_buffer_predisable(indio_dev); + return ret; } @@ -704,8 +711,6 @@ static int sx9500_buffer_predisable(struct iio_dev *indio_dev) struct sx9500_data *data = iio_priv(indio_dev); int ret = 0, i; - iio_triggered_buffer_predisable(indio_dev); - mutex_lock(&data->mutex); for (i = 0; i < SX9500_NUM_CHANNELS; i++) @@ -722,12 +727,13 @@ static int sx9500_buffer_predisable(struct iio_dev *indio_dev) mutex_unlock(&data->mutex); + iio_triggered_buffer_predisable(indio_dev); + return ret; } static const struct iio_buffer_setup_ops sx9500_buffer_setup_ops = { - .preenable = sx9500_buffer_preenable, - .postenable = iio_triggered_buffer_postenable, + .postenable = sx9500_buffer_postenable, .predisable = sx9500_buffer_predisable, }; From 76510ec692c88ee865ebb32bb77b1ee294fee89e Mon Sep 17 00:00:00 2001 From: Colin Ian King Date: Wed, 25 Sep 2019 10:51:26 +0100 Subject: [PATCH 37/41] counter: stm32: clean up indentation issue There is an if statement that is indented one level too deeply, remove the extraneous tabs. Signed-off-by: Colin Ian King Acked-by: William Breathitt Gray Signed-off-by: Jonathan Cameron --- drivers/counter/stm32-timer-cnt.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/counter/stm32-timer-cnt.c b/drivers/counter/stm32-timer-cnt.c index e425dd1e41fe..b61135b63ee8 100644 --- a/drivers/counter/stm32-timer-cnt.c +++ b/drivers/counter/stm32-timer-cnt.c @@ -219,8 +219,8 @@ static ssize_t stm32_count_enable_write(struct counter_device *counter, if (enable) { regmap_read(priv->regmap, TIM_CR1, &cr1); - if (!(cr1 & TIM_CR1_CEN)) - clk_enable(priv->clk); + if (!(cr1 & TIM_CR1_CEN)) + clk_enable(priv->clk); regmap_update_bits(priv->regmap, TIM_CR1, TIM_CR1_CEN, TIM_CR1_CEN); From 4dbc54c55923ff0934a2d6e7facdbed21ed423c0 Mon Sep 17 00:00:00 2001 From: Colin Ian King Date: Wed, 25 Sep 2019 13:32:53 +0100 Subject: [PATCH 38/41] iio: gyro: clean up indentation issue There is a return statement that is indented incorrectly, add in the missing tab. Signed-off-by: Colin Ian King Signed-off-by: Jonathan Cameron --- drivers/iio/gyro/itg3200_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/gyro/itg3200_core.c b/drivers/iio/gyro/itg3200_core.c index 998fb8d66fe3..981ae2291505 100644 --- a/drivers/iio/gyro/itg3200_core.c +++ b/drivers/iio/gyro/itg3200_core.c @@ -154,7 +154,7 @@ static int itg3200_write_raw(struct iio_dev *indio_dev, t); mutex_unlock(&indio_dev->mlock); - return ret; + return ret; default: return -EINVAL; From 0c8a6e72f3c04bfe92a64e5e0791bfe006aabe08 Mon Sep 17 00:00:00 2001 From: Alexandru Ardelean Date: Fri, 20 Sep 2019 10:31:22 +0300 Subject: [PATCH 39/41] iio: chemical: atlas-ph-sensor: fix iio_triggered_buffer_predisable() position The iio_triggered_buffer_{predisable,postenable} functions attach/detach the poll functions. The iio_triggered_buffer_predisable() should be called last, to detach the poll func after the devices has been suspended. The position of iio_triggered_buffer_postenable() is correct. Note this is not stable material. It's a fix in the logical model rather fixing an actual bug. These are being tidied up throughout the subsystem to allow more substantial rework that was blocked by variations in how things were done. Signed-off-by: Alexandru Ardelean Acked-by: Matt Ranostay Signed-off-by: Jonathan Cameron --- drivers/iio/chemical/atlas-ph-sensor.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/iio/chemical/atlas-ph-sensor.c b/drivers/iio/chemical/atlas-ph-sensor.c index 3a20cb5d9bff..6c175eb1c7a7 100644 --- a/drivers/iio/chemical/atlas-ph-sensor.c +++ b/drivers/iio/chemical/atlas-ph-sensor.c @@ -323,16 +323,16 @@ static int atlas_buffer_predisable(struct iio_dev *indio_dev) struct atlas_data *data = iio_priv(indio_dev); int ret; - ret = iio_triggered_buffer_predisable(indio_dev); - if (ret) - return ret; - ret = atlas_set_interrupt(data, false); if (ret) return ret; pm_runtime_mark_last_busy(&data->client->dev); - return pm_runtime_put_autosuspend(&data->client->dev); + ret = pm_runtime_put_autosuspend(&data->client->dev); + if (ret) + return ret; + + return iio_triggered_buffer_predisable(indio_dev); } static const struct iio_trigger_ops atlas_interrupt_trigger_ops = { From 420119fcc5543bce406d8322ddcecf7081f3f249 Mon Sep 17 00:00:00 2001 From: Baolin Wang Date: Fri, 27 Sep 2019 10:41:19 +0800 Subject: [PATCH 40/41] iio: adc: sc27xx: Use devm_hwspin_lock_request_specific() to simplify code Change to use devm_hwspin_lock_request_specific() to help to simplify the cleanup code for drivers requesting one hwlock. Signed-off-by: Baolin Wang Signed-off-by: Jonathan Cameron --- drivers/iio/adc/sc27xx_adc.c | 16 +--------------- 1 file changed, 1 insertion(+), 15 deletions(-) diff --git a/drivers/iio/adc/sc27xx_adc.c b/drivers/iio/adc/sc27xx_adc.c index a6c046575ec3..66b387f9b36d 100644 --- a/drivers/iio/adc/sc27xx_adc.c +++ b/drivers/iio/adc/sc27xx_adc.c @@ -477,13 +477,6 @@ static void sc27xx_adc_disable(void *_data) SC27XX_MODULE_ADC_EN, 0); } -static void sc27xx_adc_free_hwlock(void *_data) -{ - struct hwspinlock *hwlock = _data; - - hwspin_lock_free(hwlock); -} - static int sc27xx_adc_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -520,19 +513,12 @@ static int sc27xx_adc_probe(struct platform_device *pdev) return ret; } - sc27xx_data->hwlock = hwspin_lock_request_specific(ret); + sc27xx_data->hwlock = devm_hwspin_lock_request_specific(dev, ret); if (!sc27xx_data->hwlock) { dev_err(dev, "failed to request hwspinlock\n"); return -ENXIO; } - ret = devm_add_action_or_reset(dev, sc27xx_adc_free_hwlock, - sc27xx_data->hwlock); - if (ret) { - dev_err(dev, "failed to add hwspinlock action\n"); - return ret; - } - sc27xx_data->dev = dev; ret = sc27xx_adc_enable(sc27xx_data); From a521d52d1eb20265e830d155ff684453ea229c86 Mon Sep 17 00:00:00 2001 From: Bartosz Golaszewski Date: Wed, 2 Oct 2019 10:57:58 +0200 Subject: [PATCH 41/41] iio: pressure: bmp280: remove stray newline Remove a stray newline from the probe callback. Signed-off-by: Bartosz Golaszewski Signed-off-by: Jonathan Cameron --- drivers/iio/pressure/bmp280-core.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/iio/pressure/bmp280-core.c b/drivers/iio/pressure/bmp280-core.c index 8d0f15f27dc5..c3b5c1f6614d 100644 --- a/drivers/iio/pressure/bmp280-core.c +++ b/drivers/iio/pressure/bmp280-core.c @@ -1130,7 +1130,6 @@ int bmp280_common_probe(struct device *dev, if (ret) goto out_runtime_pm_disable; - return 0; out_runtime_pm_disable: