From 9048f1f18a70a01eaa3c8e7166fdb2538929d780 Mon Sep 17 00:00:00 2001 From: Akinobu Mita Date: Tue, 26 Jun 2018 00:22:41 +0900 Subject: iio: accel: adxl345: convert address field usage in iio_chan_spec Currently the address field in iio_chan_spec is filled with an accel data register address for the corresponding axis. In preparation for adding calibration offset support, this sets the address field to the index of accel data registers instead of the actual register address. This change makes it easier to access both accel registers and calibration offset registers with fewer lines of code as these are located in X-axis, Y-axis, Z-axis order. Cc: Eva Rachel Retuya Cc: Andy Shevchenko Cc: Jonathan Cameron Signed-off-by: Akinobu Mita Signed-off-by: Jonathan Cameron --- drivers/iio/accel/adxl345_core.c | 21 ++++++++++++--------- 1 file changed, 12 insertions(+), 9 deletions(-) (limited to 'drivers/iio') diff --git a/drivers/iio/accel/adxl345_core.c b/drivers/iio/accel/adxl345_core.c index 8e0d56b89201..7a25840d806f 100644 --- a/drivers/iio/accel/adxl345_core.c +++ b/drivers/iio/accel/adxl345_core.c @@ -23,6 +23,8 @@ #define ADXL345_REG_DATAX0 0x32 #define ADXL345_REG_DATAY0 0x34 #define ADXL345_REG_DATAZ0 0x36 +#define ADXL345_REG_DATA_AXIS(index) \ + (ADXL345_REG_DATAX0 + (index) * sizeof(__le16)) #define ADXL345_POWER_CTL_MEASURE BIT(3) #define ADXL345_POWER_CTL_STANDBY 0x00 @@ -49,19 +51,19 @@ struct adxl345_data { u8 data_range; }; -#define ADXL345_CHANNEL(reg, axis) { \ +#define ADXL345_CHANNEL(index, axis) { \ .type = IIO_ACCEL, \ .modified = 1, \ .channel2 = IIO_MOD_##axis, \ - .address = reg, \ + .address = index, \ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ } static const struct iio_chan_spec adxl345_channels[] = { - ADXL345_CHANNEL(ADXL345_REG_DATAX0, X), - ADXL345_CHANNEL(ADXL345_REG_DATAY0, Y), - ADXL345_CHANNEL(ADXL345_REG_DATAZ0, Z), + ADXL345_CHANNEL(0, X), + ADXL345_CHANNEL(1, Y), + ADXL345_CHANNEL(2, Z), }; static int adxl345_read_raw(struct iio_dev *indio_dev, @@ -69,7 +71,7 @@ static int adxl345_read_raw(struct iio_dev *indio_dev, int *val, int *val2, long mask) { struct adxl345_data *data = iio_priv(indio_dev); - __le16 regval; + __le16 accel; int ret; switch (mask) { @@ -79,12 +81,13 @@ static int adxl345_read_raw(struct iio_dev *indio_dev, * ADXL345_REG_DATA(X0/Y0/Z0) contain the least significant byte * and ADXL345_REG_DATA(X0/Y0/Z0) + 1 the most significant byte */ - ret = regmap_bulk_read(data->regmap, chan->address, ®val, - sizeof(regval)); + ret = regmap_bulk_read(data->regmap, + ADXL345_REG_DATA_AXIS(chan->address), + &accel, sizeof(accel)); if (ret < 0) return ret; - *val = sign_extend32(le16_to_cpu(regval), 12); + *val = sign_extend32(le16_to_cpu(accel), 12); return IIO_VAL_INT; case IIO_CHAN_INFO_SCALE: *val = 0; -- cgit v1.2.3