Commit ac856912 authored by Guillaume Stols's avatar Guillaume Stols Committed by Jonathan Cameron
Browse files

iio: adc: ad7606: add support for writing registers when using backend 



Add the logic for effectively enabling the software mode for the
iio-backend, i.e. enabling the software mode channel configuration and
implementing the register writing functions.

Signed-off-by: default avatarGuillaume Stols <gstols@baylibre.com>
Co-developed-by: default avatarAngelo Dureghello <adureghello@baylibre.com>
Signed-off-by: default avatarAngelo Dureghello <adureghello@baylibre.com>
Link: https://patch.msgid.link/20250210-wip-bl-ad7606_add_backend_sw_mode-v4-9-160df18b1da7@baylibre.com


Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent 5efb0a3c

drivers/iio/adc/ad7606.h

+15 −0
Original line number Diff line number Diff line
@@ -96,6 +96,21 @@ 
		BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO),  \

		0, 0, 16)



#define AD7606_BI_SW_CHANNEL(num)			\

	AD760X_CHANNEL(num,				\

		/* mask separate */			\

		BIT(IIO_CHAN_INFO_SCALE),		\

		/* mask type */				\

		0,					\

		/* mask all */				\

		BIT(IIO_CHAN_INFO_SAMP_FREQ) |		\

		BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO),	\

		/* mask separate available */		\

		BIT(IIO_CHAN_INFO_SCALE),		\

		/* mask all available */		\

		BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO),	\

		16)



struct ad7606_state;



typedef int (*ad7606_scale_setup_cb_t)(struct iio_dev *indio_dev,

drivers/iio/adc/ad7606_par.c

+48 −4
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ 
#include <linux/iio/iio.h>



#include "ad7606.h"

#include "ad7606_bus_iface.h"



static const struct iio_chan_spec ad7606b_bi_channels[] = {

	AD7606_BI_CHANNEL(0),
@@ -31,7 +32,19 @@ static const struct iio_chan_spec ad7606b_bi_channels[] = { 
	AD7606_BI_CHANNEL(7),

};



static int ad7606_bi_update_scan_mode(struct iio_dev *indio_dev, const unsigned long *scan_mask)

static const struct iio_chan_spec ad7606b_bi_sw_channels[] = {

	AD7606_BI_SW_CHANNEL(0),

	AD7606_BI_SW_CHANNEL(1),

	AD7606_BI_SW_CHANNEL(2),

	AD7606_BI_SW_CHANNEL(3),

	AD7606_BI_SW_CHANNEL(4),

	AD7606_BI_SW_CHANNEL(5),

	AD7606_BI_SW_CHANNEL(6),

	AD7606_BI_SW_CHANNEL(7),

};



static int ad7606_par_bus_update_scan_mode(struct iio_dev *indio_dev,

					   const unsigned long *scan_mask)

{

	struct ad7606_state *st = iio_priv(indio_dev);

	unsigned int c, ret;
@@ -48,7 +61,8 @@ static int ad7606_bi_update_scan_mode(struct iio_dev *indio_dev, const unsigned 
	return 0;

}



static int ad7606_bi_setup_iio_backend(struct device *dev, struct iio_dev *indio_dev)

static int ad7606_par_bus_setup_iio_backend(struct device *dev,

					    struct iio_dev *indio_dev)

{

	struct ad7606_state *st = iio_priv(indio_dev);

	unsigned int ret, c;
@@ -86,9 +100,39 @@ static int ad7606_bi_setup_iio_backend(struct device *dev, struct iio_dev *indio 
	return 0;

}



static int ad7606_par_bus_reg_read(struct ad7606_state *st, unsigned int addr)

{

	struct ad7606_platform_data *pdata = st->dev->platform_data;

	int val, ret;



	ret = pdata->bus_reg_read(st->back, addr, &val);

	if (ret)

		return ret;



	return val;

}



static int ad7606_par_bus_reg_write(struct ad7606_state *st, unsigned int addr,

				    unsigned int val)

{

	struct ad7606_platform_data *pdata = st->dev->platform_data;



	return pdata->bus_reg_write(st->back, addr, val);

}



static int ad7606_par_bus_sw_mode_config(struct iio_dev *indio_dev)

{

	indio_dev->channels = ad7606b_bi_sw_channels;



	return 0;

}



static const struct ad7606_bus_ops ad7606_bi_bops = {

	.iio_backend_config = ad7606_bi_setup_iio_backend,

	.update_scan_mode = ad7606_bi_update_scan_mode,

	.iio_backend_config = ad7606_par_bus_setup_iio_backend,

	.update_scan_mode = ad7606_par_bus_update_scan_mode,

	.reg_read = ad7606_par_bus_reg_read,

	.reg_write = ad7606_par_bus_reg_write,

	.sw_mode_config = ad7606_par_bus_sw_mode_config,

};



static int ad7606_par16_read_block(struct device *dev,