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iio: hi8435: add raw access

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With current event-only driver, it is not possible for user space
application to know current senses if they don't change since
application starts.

Address that by adding raw access to channels.

Signed-off-by: Nikita Yushchenko <nikita.yoush@cogentembedded.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Nikita Yushchenko 2017-05-19 17:47:59 +03:00 committed by Jonathan Cameron
parent 14b39dce37
commit fa7662e1bd
1 changed files with 22 additions and 0 deletions
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22
drivers/iio/adc/hi8435.c
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@ -105,6 +105,26 @@ static int hi8435_writew(struct hi8435_priv *priv, u8 reg, u16 val)
return spi_write(priv->spi, priv->reg_buffer, 3);
}
static int hi8435_read_raw(struct iio_dev *idev,
const struct iio_chan_spec *chan,
int *val, int *val2, long mask)
{
struct hi8435_priv *priv = iio_priv(idev);
u32 tmp;
int ret;
switch (mask) {
case IIO_CHAN_INFO_RAW:
ret = hi8435_readl(priv, HI8435_SO31_0_REG, &tmp);
if (ret < 0)
return ret;
*val = !!(tmp & BIT(chan->channel));
return IIO_VAL_INT;
default:
return -EINVAL;
}
}
static int hi8435_read_event_config(struct iio_dev *idev,
const struct iio_chan_spec *chan,
enum iio_event_type type,
@ -333,6 +353,7 @@ static const struct iio_chan_spec_ext_info hi8435_ext_info[] = {
.type = IIO_VOLTAGE, \
.indexed = 1, \
.channel = num, \
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
.event_spec = hi8435_events, \
.num_event_specs = ARRAY_SIZE(hi8435_events), \
.ext_info = hi8435_ext_info, \
@ -376,6 +397,7 @@ static const struct iio_chan_spec hi8435_channels[] = {
static const struct iio_info hi8435_info = {
.driver_module = THIS_MODULE,
.read_raw = hi8435_read_raw,
.read_event_config = &hi8435_read_event_config,
.write_event_config = hi8435_write_event_config,
.read_event_value = &hi8435_read_event_value,