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iio: potentiometer: ds1803: Add device specific read_raw function 

Added function pointer in the device specific structure to
call the appropriate device read_raw function, so that the
other type of devices with different read method can be
handled.

Signed-off-by: Jagath Jog J <jagathjog1996@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20220223163525.13399-6-jagathjog1996@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Jagath Jog J 2022-02-23 22:05:23 +05:30 committed by Jonathan Cameron
parent 6450b62cb2
commit 9b68725e90
1 changed files with 22 additions and 5 deletions
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27
drivers/iio/potentiometer/ds1803.c
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@ -32,6 +32,8 @@ struct ds1803_cfg {
int kohms;
const struct iio_chan_spec *channels;
u8 num_channels;
int (*read)(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan, int *val);
};
struct ds1803_data {
@ -55,6 +57,22 @@ static const struct iio_chan_spec ds1803_channels[] = {
DS1803_CHANNEL(1, DS1803_WIPER_1),
};
static int ds1803_read(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
int *val)
{
struct ds1803_data *data = iio_priv(indio_dev);
int ret;
u8 result[ARRAY_SIZE(ds1803_channels)];
ret = i2c_master_recv(data->client, result, indio_dev->num_channels);
if (ret < 0)
return ret;
*val = result[chan->channel];
return ret;
}
static const struct ds1803_cfg ds1803_cfg[] = {
[DS1803_010] = {
.wipers = 2,
@ -62,6 +80,7 @@ static const struct ds1803_cfg ds1803_cfg[] = {
.kohms = 10,
.channels = ds1803_channels,
.num_channels = ARRAY_SIZE(ds1803_channels),
.read = ds1803_read,
},
[DS1803_050] = {
.wipers = 2,
@ -69,6 +88,7 @@ static const struct ds1803_cfg ds1803_cfg[] = {
.kohms = 50,
.channels = ds1803_channels,
.num_channels = ARRAY_SIZE(ds1803_channels),
.read = ds1803_read,
},
[DS1803_100] = {
.wipers = 2,
@ -76,6 +96,7 @@ static const struct ds1803_cfg ds1803_cfg[] = {
.kohms = 100,
.channels = ds1803_channels,
.num_channels = ARRAY_SIZE(ds1803_channels),
.read = ds1803_read,
},
};
@ -84,18 +105,14 @@ static int ds1803_read_raw(struct iio_dev *indio_dev,
int *val, int *val2, long mask)
{
struct ds1803_data *data = iio_priv(indio_dev);
int pot = chan->channel;
int ret;
u8 result[ARRAY_SIZE(ds1803_channels)];
switch (mask) {
case IIO_CHAN_INFO_RAW:
ret = i2c_master_recv(data->client, result,
indio_dev->num_channels);
ret = data->cfg->read(indio_dev, chan, val);
if (ret < 0)
return ret;
*val = result[pot];
return IIO_VAL_INT;
case IIO_CHAN_INFO_SCALE: