mfd: twl4030-madc: Cleanup driver
Some style fixes in twl4030-madc driver. Reported-by: Jonathan Cameron <jic23@kernel.org> Reported-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Sebastian Reichel <sre@debian.org> Acked-by: Jonathan Cameron <jic23@kernel.org> Tested-by: Marek Belisko <marek@goldelico.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Sebastian Reichel
Lee Jones
Родитель
2f39b70fef
Коммит
99be0245c8
|
|
@ -49,22 +49,22 @@
|
|||
|
||||
#include <linux/iio/iio.h>
|
||||
|
||||
/*
|
||||
/**
|
||||
* struct twl4030_madc_data - a container for madc info
|
||||
* @dev - pointer to device structure for madc
|
||||
* @lock - mutex protecting this data structure
|
||||
* @requests - Array of request struct corresponding to SW1, SW2 and RT
|
||||
* @use_second_irq - IRQ selection (main or co-processor)
|
||||
* @imr - Interrupt mask register of MADC
|
||||
* @isr - Interrupt status register of MADC
|
||||
* @dev: Pointer to device structure for madc
|
||||
* @lock: Mutex protecting this data structure
|
||||
* @requests: Array of request struct corresponding to SW1, SW2 and RT
|
||||
* @use_second_irq: IRQ selection (main or co-processor)
|
||||
* @imr: Interrupt mask register of MADC
|
||||
* @isr: Interrupt status register of MADC
|
||||
*/
|
||||
struct twl4030_madc_data {
|
||||
struct device *dev;
|
||||
struct mutex lock; /* mutex protecting this data structure */
|
||||
struct twl4030_madc_request requests[TWL4030_MADC_NUM_METHODS];
|
||||
bool use_second_irq;
|
||||
int imr;
|
||||
int isr;
|
||||
u8 imr;
|
||||
u8 isr;
|
||||
};
|
||||
|
||||
static int twl4030_madc_read(struct iio_dev *iio_dev,
|
||||
|
|
@ -155,17 +155,16 @@ twl4030_divider_ratios[16] = {
|
|||
};
|
||||
|
||||
|
||||
/*
|
||||
* Conversion table from -3 to 55 degree Celcius
|
||||
*/
|
||||
static int therm_tbl[] = {
|
||||
30800, 29500, 28300, 27100,
|
||||
26000, 24900, 23900, 22900, 22000, 21100, 20300, 19400, 18700, 17900,
|
||||
17200, 16500, 15900, 15300, 14700, 14100, 13600, 13100, 12600, 12100,
|
||||
11600, 11200, 10800, 10400, 10000, 9630, 9280, 8950, 8620, 8310,
|
||||
8020, 7730, 7460, 7200, 6950, 6710, 6470, 6250, 6040, 5830,
|
||||
5640, 5450, 5260, 5090, 4920, 4760, 4600, 4450, 4310, 4170,
|
||||
4040, 3910, 3790, 3670, 3550
|
||||
/* Conversion table from -3 to 55 degrees Celcius */
|
||||
static int twl4030_therm_tbl[] = {
|
||||
30800, 29500, 28300, 27100,
|
||||
26000, 24900, 23900, 22900, 22000, 21100, 20300, 19400, 18700,
|
||||
17900, 17200, 16500, 15900, 15300, 14700, 14100, 13600, 13100,
|
||||
12600, 12100, 11600, 11200, 10800, 10400, 10000, 9630, 9280,
|
||||
8950, 8620, 8310, 8020, 7730, 7460, 7200, 6950, 6710,
|
||||
6470, 6250, 6040, 5830, 5640, 5450, 5260, 5090, 4920,
|
||||
4760, 4600, 4450, 4310, 4170, 4040, 3910, 3790, 3670,
|
||||
3550
|
||||
};
|
||||
|
||||
/*
|
||||
|
|
@ -197,11 +196,12 @@ const struct twl4030_madc_conversion_method twl4030_conversion_methods[] = {
|
|||
},
|
||||
};
|
||||
|
||||
/*
|
||||
* Function to read a particular channel value.
|
||||
* @madc - pointer to struct twl4030_madc_data
|
||||
* @reg - lsb of ADC Channel
|
||||
* If the i2c read fails it returns an error else returns 0.
|
||||
/**
|
||||
* twl4030_madc_channel_raw_read() - Function to read a particular channel value
|
||||
* @madc: pointer to struct twl4030_madc_data
|
||||
* @reg: lsb of ADC Channel
|
||||
*
|
||||
* Return: 0 on success, an error code otherwise.
|
||||
*/
|
||||
static int twl4030_madc_channel_raw_read(struct twl4030_madc_data *madc, u8 reg)
|
||||
{
|
||||
|
|
@ -227,7 +227,7 @@ static int twl4030_madc_channel_raw_read(struct twl4030_madc_data *madc, u8 reg)
|
|||
}
|
||||
|
||||
/*
|
||||
* Return battery temperature
|
||||
* Return battery temperature in degrees Celsius
|
||||
* Or < 0 on failure.
|
||||
*/
|
||||
static int twl4030battery_temperature(int raw_volt)
|
||||
|
|
@ -236,18 +236,18 @@ static int twl4030battery_temperature(int raw_volt)
|
|||
int temp, curr, volt, res, ret;
|
||||
|
||||
volt = (raw_volt * TEMP_STEP_SIZE) / TEMP_PSR_R;
|
||||
/* Getting and calculating the supply current in micro ampers */
|
||||
/* Getting and calculating the supply current in micro amperes */
|
||||
ret = twl_i2c_read_u8(TWL_MODULE_MAIN_CHARGE, &val,
|
||||
REG_BCICTL2);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
curr = ((val & TWL4030_BCI_ITHEN) + 1) * 10;
|
||||
/* Getting and calculating the thermistor resistance in ohms */
|
||||
res = volt * 1000 / curr;
|
||||
/* calculating temperature */
|
||||
for (temp = 58; temp >= 0; temp--) {
|
||||
int actual = therm_tbl[temp];
|
||||
|
||||
int actual = twl4030_therm_tbl[temp];
|
||||
if ((actual - res) >= 0)
|
||||
break;
|
||||
}
|
||||
|
|
@ -269,11 +269,12 @@ static int twl4030battery_current(int raw_volt)
|
|||
else /* slope of 0.88 mV/mA */
|
||||
return (raw_volt * CURR_STEP_SIZE) / CURR_PSR_R2;
|
||||
}
|
||||
|
||||
/*
|
||||
* Function to read channel values
|
||||
* @madc - pointer to twl4030_madc_data struct
|
||||
* @reg_base - Base address of the first channel
|
||||
* @Channels - 16 bit bitmap. If the bit is set, channel value is read
|
||||
* @Channels - 16 bit bitmap. If the bit is set, channel's value is read
|
||||
* @buf - The channel values are stored here. if read fails error
|
||||
* @raw - Return raw values without conversion
|
||||
* value is stored
|
||||
|
|
@ -284,17 +285,17 @@ static int twl4030_madc_read_channels(struct twl4030_madc_data *madc,
|
|||
long channels, int *buf,
|
||||
bool raw)
|
||||
{
|
||||
int count = 0, count_req = 0, i;
|
||||
int count = 0;
|
||||
int i;
|
||||
u8 reg;
|
||||
|
||||
for_each_set_bit(i, &channels, TWL4030_MADC_MAX_CHANNELS) {
|
||||
reg = reg_base + 2 * i;
|
||||
reg = reg_base + (2 * i);
|
||||
buf[i] = twl4030_madc_channel_raw_read(madc, reg);
|
||||
if (buf[i] < 0) {
|
||||
dev_err(madc->dev,
|
||||
"Unable to read register 0x%X\n", reg);
|
||||
count_req++;
|
||||
continue;
|
||||
dev_err(madc->dev, "Unable to read register 0x%X\n",
|
||||
reg);
|
||||
return buf[i];
|
||||
}
|
||||
if (raw) {
|
||||
count++;
|
||||
|
|
@ -305,7 +306,7 @@ static int twl4030_madc_read_channels(struct twl4030_madc_data *madc,
|
|||
buf[i] = twl4030battery_current(buf[i]);
|
||||
if (buf[i] < 0) {
|
||||
dev_err(madc->dev, "err reading current\n");
|
||||
count_req++;
|
||||
return buf[i];
|
||||
} else {
|
||||
count++;
|
||||
buf[i] = buf[i] - 750;
|
||||
|
|
@ -315,7 +316,7 @@ static int twl4030_madc_read_channels(struct twl4030_madc_data *madc,
|
|||
buf[i] = twl4030battery_temperature(buf[i]);
|
||||
if (buf[i] < 0) {
|
||||
dev_err(madc->dev, "err reading temperature\n");
|
||||
count_req++;
|
||||
return buf[i];
|
||||
} else {
|
||||
buf[i] -= 3;
|
||||
count++;
|
||||
|
|
@ -336,8 +337,6 @@ static int twl4030_madc_read_channels(struct twl4030_madc_data *madc,
|
|||
twl4030_divider_ratios[i].numerator);
|
||||
}
|
||||
}
|
||||
if (count_req)
|
||||
dev_err(madc->dev, "%d channel conversion failed\n", count_req);
|
||||
|
||||
return count;
|
||||
}
|
||||
|
|
@ -361,13 +360,13 @@ static int twl4030_madc_enable_irq(struct twl4030_madc_data *madc, u8 id)
|
|||
madc->imr);
|
||||
return ret;
|
||||
}
|
||||
|
||||
val &= ~(1 << id);
|
||||
ret = twl_i2c_write_u8(TWL4030_MODULE_MADC, val, madc->imr);
|
||||
if (ret) {
|
||||
dev_err(madc->dev,
|
||||
"unable to write imr register 0x%X\n", madc->imr);
|
||||
return ret;
|
||||
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
|
@ -430,7 +429,7 @@ static irqreturn_t twl4030_madc_threaded_irq_handler(int irq, void *_madc)
|
|||
continue;
|
||||
ret = twl4030_madc_disable_irq(madc, i);
|
||||
if (ret < 0)
|
||||
dev_dbg(madc->dev, "Disable interrupt failed%d\n", i);
|
||||
dev_dbg(madc->dev, "Disable interrupt failed %d\n", i);
|
||||
madc->requests[i].result_pending = 1;
|
||||
}
|
||||
for (i = 0; i < TWL4030_MADC_NUM_METHODS; i++) {
|
||||
|
|
@ -512,21 +511,17 @@ static int twl4030_madc_start_conversion(struct twl4030_madc_data *madc,
|
|||
{
|
||||
const struct twl4030_madc_conversion_method *method;
|
||||
int ret = 0;
|
||||
|
||||
if (conv_method != TWL4030_MADC_SW1 && conv_method != TWL4030_MADC_SW2)
|
||||
return -ENOTSUPP;
|
||||
|
||||
method = &twl4030_conversion_methods[conv_method];
|
||||
switch (conv_method) {
|
||||
case TWL4030_MADC_SW1:
|
||||
case TWL4030_MADC_SW2:
|
||||
ret = twl_i2c_write_u8(TWL4030_MODULE_MADC,
|
||||
TWL4030_MADC_SW_START, method->ctrl);
|
||||
if (ret) {
|
||||
dev_err(madc->dev,
|
||||
"unable to write ctrl register 0x%X\n",
|
||||
method->ctrl);
|
||||
return ret;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
ret = twl_i2c_write_u8(TWL4030_MODULE_MADC, TWL4030_MADC_SW_START,
|
||||
method->ctrl);
|
||||
if (ret) {
|
||||
dev_err(madc->dev, "unable to write ctrl register 0x%X\n",
|
||||
method->ctrl);
|
||||
return ret;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
|
@ -623,8 +618,8 @@ int twl4030_madc_conversion(struct twl4030_madc_request *req)
|
|||
ch_lsb, method->avg);
|
||||
if (ret) {
|
||||
dev_err(twl4030_madc->dev,
|
||||
"unable to write sel reg 0x%X\n",
|
||||
method->sel + 1);
|
||||
"unable to write avg reg 0x%X\n",
|
||||
method->avg);
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
|
|
@ -665,10 +660,6 @@ out:
|
|||
}
|
||||
EXPORT_SYMBOL_GPL(twl4030_madc_conversion);
|
||||
|
||||
/*
|
||||
* Return channel value
|
||||
* Or < 0 on failure.
|
||||
*/
|
||||
int twl4030_get_madc_conversion(int channel_no)
|
||||
{
|
||||
struct twl4030_madc_request req;
|
||||
|
|
@ -689,20 +680,25 @@ int twl4030_get_madc_conversion(int channel_no)
|
|||
}
|
||||
EXPORT_SYMBOL_GPL(twl4030_get_madc_conversion);
|
||||
|
||||
/*
|
||||
/**
|
||||
* twl4030_madc_set_current_generator() - setup bias current
|
||||
*
|
||||
* @madc: pointer to twl4030_madc_data struct
|
||||
* @chan: can be one of the two values:
|
||||
* TWL4030_BCI_ITHEN
|
||||
* Enables bias current for main battery type reading
|
||||
* TWL4030_BCI_TYPEN
|
||||
* Enables bias current for main battery temperature sensing
|
||||
* @on: enable or disable chan.
|
||||
*
|
||||
* Function to enable or disable bias current for
|
||||
* main battery type reading or temperature sensing
|
||||
* @madc - pointer to twl4030_madc_data struct
|
||||
* @chan - can be one of the two values
|
||||
* TWL4030_BCI_ITHEN - Enables bias current for main battery type reading
|
||||
* TWL4030_BCI_TYPEN - Enables bias current for main battery temperature
|
||||
* sensing
|
||||
* @on - enable or disable chan.
|
||||
*/
|
||||
static int twl4030_madc_set_current_generator(struct twl4030_madc_data *madc,
|
||||
int chan, int on)
|
||||
{
|
||||
int ret;
|
||||
int regmask;
|
||||
u8 regval;
|
||||
|
||||
ret = twl_i2c_read_u8(TWL_MODULE_MAIN_CHARGE,
|
||||
|
|
@ -712,10 +708,13 @@ static int twl4030_madc_set_current_generator(struct twl4030_madc_data *madc,
|
|||
TWL4030_BCI_BCICTL1);
|
||||
return ret;
|
||||
}
|
||||
|
||||
regmask = chan ? TWL4030_BCI_ITHEN : TWL4030_BCI_TYPEN;
|
||||
if (on)
|
||||
regval |= chan ? TWL4030_BCI_ITHEN : TWL4030_BCI_TYPEN;
|
||||
regval |= regmask;
|
||||
else
|
||||
regval &= chan ? ~TWL4030_BCI_ITHEN : ~TWL4030_BCI_TYPEN;
|
||||
regval &= ~regmask;
|
||||
|
||||
ret = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE,
|
||||
regval, TWL4030_BCI_BCICTL1);
|
||||
if (ret) {
|
||||
|
|
@ -730,7 +729,7 @@ static int twl4030_madc_set_current_generator(struct twl4030_madc_data *madc,
|
|||
/*
|
||||
* Function that sets MADC software power on bit to enable MADC
|
||||
* @madc - pointer to twl4030_madc_data struct
|
||||
* @on - Enable or disable MADC software powen on bit.
|
||||
* @on - Enable or disable MADC software power on bit.
|
||||
* returns error if i2c read/write fails else 0
|
||||
*/
|
||||
static int twl4030_madc_set_power(struct twl4030_madc_data *madc, int on)
|
||||
|
|
@ -909,7 +908,7 @@ static struct platform_driver twl4030_madc_driver = {
|
|||
.name = "twl4030_madc",
|
||||
.owner = THIS_MODULE,
|
||||
.of_match_table = of_match_ptr(twl_madc_of_match),
|
||||
},
|
||||
},
|
||||
};
|
||||
|
||||
module_platform_driver(twl4030_madc_driver);
|
||||
|
|
|
|||
|
|
@ -44,7 +44,7 @@ struct twl4030_madc_conversion_method {
|
|||
|
||||
struct twl4030_madc_request {
|
||||
unsigned long channels;
|
||||
u16 do_avg;
|
||||
bool do_avg;
|
||||
u16 method;
|
||||
u16 type;
|
||||
bool active;
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче