diff options
-rw-r--r-- | drivers/iio/accel/adxl345_core.c | 41 |
1 files changed, 40 insertions, 1 deletions
diff --git a/drivers/iio/accel/adxl345_core.c b/drivers/iio/accel/adxl345_core.c index 7a25840d806f..7b29ae8375e9 100644 --- a/drivers/iio/accel/adxl345_core.c +++ b/drivers/iio/accel/adxl345_core.c @@ -18,6 +18,10 @@ #include "adxl345.h" #define ADXL345_REG_DEVID 0x00 +#define ADXL345_REG_OFSX 0x1e +#define ADXL345_REG_OFSY 0x1f +#define ADXL345_REG_OFSZ 0x20 +#define ADXL345_REG_OFS_AXIS(index) (ADXL345_REG_OFSX + (index)) #define ADXL345_REG_POWER_CTL 0x2D #define ADXL345_REG_DATA_FORMAT 0x31 #define ADXL345_REG_DATAX0 0x32 @@ -56,7 +60,8 @@ struct adxl345_data { .modified = 1, \ .channel2 = IIO_MOD_##axis, \ .address = index, \ - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ + BIT(IIO_CHAN_INFO_CALIBBIAS), \ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ } @@ -72,6 +77,7 @@ static int adxl345_read_raw(struct iio_dev *indio_dev, { struct adxl345_data *data = iio_priv(indio_dev); __le16 accel; + unsigned int regval; int ret; switch (mask) { @@ -94,6 +100,38 @@ static int adxl345_read_raw(struct iio_dev *indio_dev, *val2 = adxl345_uscale; return IIO_VAL_INT_PLUS_MICRO; + case IIO_CHAN_INFO_CALIBBIAS: + ret = regmap_read(data->regmap, + ADXL345_REG_OFS_AXIS(chan->address), ®val); + if (ret < 0) + return ret; + /* + * 8-bit resolution at +/- 2g, that is 4x accel data scale + * factor + */ + *val = sign_extend32(regval, 7) * 4; + + return IIO_VAL_INT; + } + + return -EINVAL; +} + +static int adxl345_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, int val2, long mask) +{ + struct adxl345_data *data = iio_priv(indio_dev); + + switch (mask) { + case IIO_CHAN_INFO_CALIBBIAS: + /* + * 8-bit resolution at +/- 2g, that is 4x accel data scale + * factor + */ + return regmap_write(data->regmap, + ADXL345_REG_OFS_AXIS(chan->address), + val / 4); } return -EINVAL; @@ -101,6 +139,7 @@ static int adxl345_read_raw(struct iio_dev *indio_dev, static const struct iio_info adxl345_info = { .read_raw = adxl345_read_raw, + .write_raw = adxl345_write_raw, }; int adxl345_core_probe(struct device *dev, struct regmap *regmap, |