iio: adc: axp20x_adc: add support for AXP813 ADC
The X-Powers AXP813 PMIC is really close to what is already done for AXP20X/AXP22X. There are two pairs of bits to set the rate (one for Voltage and Current measurements and one for TS/GPIO0 voltage measurements) instead of one. The register to set the ADC rates is different from the one for AXP20X/AXP22X. GPIO0 can be used as an ADC (measuring Volts) unlike for AXP22X. The scales to apply to the different inputs are unlike the ones from AXP20X and AXP22X. Signed-off-by: Quentin Schulz <quentin.schulz@free-electrons.com> Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Quentin Schulz
Jonathan Cameron
Родитель
359163d786
Коммит
1a3f675564
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@ -35,8 +35,13 @@
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#define AXP20X_GPIO10_IN_RANGE_GPIO1_VAL(x) (((x) & BIT(0)) << 1)
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#define AXP20X_ADC_RATE_MASK GENMASK(7, 6)
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#define AXP813_V_I_ADC_RATE_MASK GENMASK(5, 4)
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#define AXP813_ADC_RATE_MASK (AXP20X_ADC_RATE_MASK | AXP813_V_I_ADC_RATE_MASK)
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#define AXP20X_ADC_RATE_HZ(x) ((ilog2((x) / 25) << 6) & AXP20X_ADC_RATE_MASK)
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#define AXP22X_ADC_RATE_HZ(x) ((ilog2((x) / 100) << 6) & AXP20X_ADC_RATE_MASK)
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#define AXP813_TS_GPIO0_ADC_RATE_HZ(x) AXP20X_ADC_RATE_HZ(x)
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#define AXP813_V_I_ADC_RATE_HZ(x) ((ilog2((x) / 100) << 4) & AXP813_V_I_ADC_RATE_MASK)
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#define AXP813_ADC_RATE_HZ(x) (AXP20X_ADC_RATE_HZ(x) | AXP813_V_I_ADC_RATE_HZ(x))
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#define AXP20X_ADC_CHANNEL(_channel, _name, _type, _reg) \
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{ \
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@ -95,6 +100,12 @@ enum axp22x_adc_channel_i {
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AXP22X_BATT_DISCHRG_I,
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};
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enum axp813_adc_channel_v {
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AXP813_TS_IN = 0,
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AXP813_GPIO0_V,
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AXP813_BATT_V,
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};
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static struct iio_map axp20x_maps[] = {
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{
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.consumer_dev_name = "axp20x-usb-power-supply",
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@ -197,6 +208,25 @@ static const struct iio_chan_spec axp22x_adc_channels[] = {
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AXP20X_BATT_DISCHRG_I_H),
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};
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static const struct iio_chan_spec axp813_adc_channels[] = {
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{
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.type = IIO_TEMP,
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.address = AXP22X_PMIC_TEMP_H,
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.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
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BIT(IIO_CHAN_INFO_SCALE) |
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BIT(IIO_CHAN_INFO_OFFSET),
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.datasheet_name = "pmic_temp",
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},
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AXP20X_ADC_CHANNEL(AXP813_GPIO0_V, "gpio0_v", IIO_VOLTAGE,
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AXP288_GP_ADC_H),
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AXP20X_ADC_CHANNEL(AXP813_BATT_V, "batt_v", IIO_VOLTAGE,
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AXP20X_BATT_V_H),
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AXP20X_ADC_CHANNEL(AXP22X_BATT_CHRG_I, "batt_chrg_i", IIO_CURRENT,
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AXP20X_BATT_CHRG_I_H),
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AXP20X_ADC_CHANNEL(AXP22X_BATT_DISCHRG_I, "batt_dischrg_i", IIO_CURRENT,
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AXP20X_BATT_DISCHRG_I_H),
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};
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static int axp20x_adc_raw(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan, int *val)
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{
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@ -243,6 +273,18 @@ static int axp22x_adc_raw(struct iio_dev *indio_dev,
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return IIO_VAL_INT;
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}
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static int axp813_adc_raw(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan, int *val)
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{
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struct axp20x_adc_iio *info = iio_priv(indio_dev);
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*val = axp20x_read_variable_width(info->regmap, chan->address, 12);
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if (*val < 0)
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return *val;
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return IIO_VAL_INT;
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}
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static int axp20x_adc_scale_voltage(int channel, int *val, int *val2)
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{
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switch (channel) {
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@ -273,6 +315,24 @@ static int axp20x_adc_scale_voltage(int channel, int *val, int *val2)
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}
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}
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static int axp813_adc_scale_voltage(int channel, int *val, int *val2)
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{
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switch (channel) {
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case AXP813_GPIO0_V:
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*val = 0;
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*val2 = 800000;
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return IIO_VAL_INT_PLUS_MICRO;
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case AXP813_BATT_V:
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*val = 1;
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*val2 = 100000;
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return IIO_VAL_INT_PLUS_MICRO;
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default:
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return -EINVAL;
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}
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}
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static int axp20x_adc_scale_current(int channel, int *val, int *val2)
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{
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switch (channel) {
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@ -342,6 +402,26 @@ static int axp22x_adc_scale(struct iio_chan_spec const *chan, int *val,
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}
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}
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static int axp813_adc_scale(struct iio_chan_spec const *chan, int *val,
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int *val2)
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{
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switch (chan->type) {
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case IIO_VOLTAGE:
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return axp813_adc_scale_voltage(chan->channel, val, val2);
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case IIO_CURRENT:
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*val = 1;
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return IIO_VAL_INT;
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case IIO_TEMP:
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*val = 100;
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return IIO_VAL_INT;
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default:
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return -EINVAL;
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}
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}
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static int axp20x_adc_offset_voltage(struct iio_dev *indio_dev, int channel,
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int *val)
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{
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@ -425,6 +505,26 @@ static int axp22x_read_raw(struct iio_dev *indio_dev,
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}
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}
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static int axp813_read_raw(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan, int *val,
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int *val2, long mask)
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{
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switch (mask) {
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case IIO_CHAN_INFO_OFFSET:
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*val = -2667;
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return IIO_VAL_INT;
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case IIO_CHAN_INFO_SCALE:
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return axp813_adc_scale(chan, val, val2);
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case IIO_CHAN_INFO_RAW:
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return axp813_adc_raw(indio_dev, chan, val);
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default:
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return -EINVAL;
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}
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}
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static int axp20x_write_raw(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan, int val, int val2,
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long mask)
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@ -470,6 +570,10 @@ static const struct iio_info axp22x_adc_iio_info = {
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.read_raw = axp22x_read_raw,
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};
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static const struct iio_info axp813_adc_iio_info = {
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.read_raw = axp813_read_raw,
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};
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static int axp20x_adc_rate(struct axp20x_adc_iio *info, int rate)
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{
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return regmap_update_bits(info->regmap, AXP20X_ADC_RATE,
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@ -484,6 +588,13 @@ static int axp22x_adc_rate(struct axp20x_adc_iio *info, int rate)
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AXP22X_ADC_RATE_HZ(rate));
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}
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static int axp813_adc_rate(struct axp20x_adc_iio *info, int rate)
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{
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return regmap_update_bits(info->regmap, AXP813_ADC_RATE,
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AXP813_ADC_RATE_MASK,
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AXP813_ADC_RATE_HZ(rate));
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}
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struct axp_data {
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const struct iio_info *iio_info;
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int num_channels;
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@ -515,9 +626,20 @@ static const struct axp_data axp22x_data = {
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.maps = axp22x_maps,
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};
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static const struct axp_data axp813_data = {
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.iio_info = &axp813_adc_iio_info,
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.num_channels = ARRAY_SIZE(axp813_adc_channels),
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.channels = axp813_adc_channels,
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.adc_en1_mask = AXP22X_ADC_EN1_MASK,
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.adc_rate = axp813_adc_rate,
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.adc_en2 = false,
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.maps = axp22x_maps,
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};
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static const struct of_device_id axp20x_adc_of_match[] = {
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{ .compatible = "x-powers,axp209-adc", .data = (void *)&axp20x_data, },
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{ .compatible = "x-powers,axp221-adc", .data = (void *)&axp22x_data, },
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{ .compatible = "x-powers,axp813-adc", .data = (void *)&axp813_data, },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, axp20x_adc_of_match);
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@ -525,6 +647,7 @@ MODULE_DEVICE_TABLE(of, axp20x_adc_of_match);
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static const struct platform_device_id axp20x_adc_id_match[] = {
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{ .name = "axp20x-adc", .driver_data = (kernel_ulong_t)&axp20x_data, },
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{ .name = "axp22x-adc", .driver_data = (kernel_ulong_t)&axp22x_data, },
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{ .name = "axp813-adc", .driver_data = (kernel_ulong_t)&axp813_data, },
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{ /* sentinel */ },
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};
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MODULE_DEVICE_TABLE(platform, axp20x_adc_id_match);
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@ -266,6 +266,8 @@ enum axp20x_variants {
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#define AXP288_RT_BATT_V_H 0xa0
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#define AXP288_RT_BATT_V_L 0xa1
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#define AXP813_ADC_RATE 0x85
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/* Fuel Gauge */
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#define AXP288_FG_RDC1_REG 0xba
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#define AXP288_FG_RDC0_REG 0xbb
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