Commit 1d8690fe authored by Mircea Caprioru's avatar Mircea Caprioru Committed by Jonathan Cameron
Browse files

iio: adc: ad7124: Add direct reg access 



This patch adds the posibility do read and write registers from userspace
using the kernel debug direct register access option.

Signed-off-by: default avatarMircea Caprioru <mircea.caprioru@analog.com>
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent 62504d1b

drivers/iio/adc/ad7124.c

+30 −0
Original line number Diff line number Diff line
@@ -98,6 +98,14 @@ 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,
@@ -427,6 +435,27 @@ 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 (reg >= ARRAY_SIZE(ad7124_reg_size))

		return -EINVAL;



	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");
@@ -442,6 +471,7 @@ 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,

};