diff options
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/potentiometer/ds1803.c | 27 |
1 files changed, 22 insertions, 5 deletions
diff --git a/drivers/iio/potentiometer/ds1803.c b/drivers/iio/potentiometer/ds1803.c index 0c274ec75721..017afa9fc83d 100644 --- a/drivers/iio/potentiometer/ds1803.c +++ b/drivers/iio/potentiometer/ds1803.c @@ -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: |