From: Mircea <mircea.caprioru@xxxxxxxxxx> This patch adds the posibility do read and write registers from userspace using the kernel debug direct register access option. Signed-off-by: Mircea <mircea.caprioru@xxxxxxxxxx> --- drivers/iio/adc/ad7124.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/drivers/iio/adc/ad7124.c b/drivers/iio/adc/ad7124.c index 52f45b13da4a..38e67e08a79a 100644 --- a/drivers/iio/adc/ad7124.c +++ b/drivers/iio/adc/ad7124.c @@ -93,6 +93,14 @@ static const unsigned int ad7124_gain[8] = { 1, 2, 4, 8, 16, 32, 64, 128 }; +static const unsigned int ad7124_reg_size[] = { + 1, 2, 3, 3, 2, 1, 3, 3, 1, 2, 2, 2, 2, + 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, + 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, + 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, + 3, 3, 3, 3, 3 +}; + static const int ad7124_master_clk_freq_hz[3] = { [AD7124_LOW_POWER] = 76800, [AD7124_MID_POWER] = 153600, @@ -360,6 +368,25 @@ static int ad7124_write_raw(struct iio_dev *indio_dev, } } +static int ad7124_reg_access(struct iio_dev *indio_dev, + unsigned int reg, + unsigned int writeval, + unsigned int *readval) +{ + struct ad7124_state *st = iio_priv(indio_dev); + int ret; + + + if (readval) + ret = ad_sd_read_reg(&st->sd, reg, ad7124_reg_size[reg], + readval); + else + ret = ad_sd_write_reg(&st->sd, reg, ad7124_reg_size[reg], + writeval); + + return ret; +} + static IIO_CONST_ATTR(in_voltage_scale_available, "0.000001164 0.000002328 0.000004656 0.000009313 0.000018626 0.000037252 0.000074505 0.000149011 0.000298023"); @@ -375,6 +402,7 @@ static const struct attribute_group ad7124_attrs_group = { static const struct iio_info ad7124_info = { .read_raw = ad7124_read_raw, .write_raw = ad7124_write_raw, + .debugfs_reg_access = &ad7124_reg_access, .validate_trigger = ad_sd_validate_trigger, .attrs = &ad7124_attrs_group, }; -- 2.17.1