diff options
| author | Nikita Yushchenko <nikita.yoush@cogentembedded.com> | 2017-05-19 17:47:59 +0300 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2017-05-20 17:31:33 +0100 |
| commit | fa7662e1bddbded1820415907740837baa897721 (patch) | |
| tree | f6983774fa844be7e419821b68e5c3f55ee20fe7 /drivers/iio/adc | |
| parent | 14b39dce373191f8fd7a703a643dccf0f97f0323 (diff) | |
| download | linux-fa7662e1bddbded1820415907740837baa897721.tar.bz2 | |
iio: hi8435: add raw access
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>
Diffstat (limited to 'drivers/iio/adc')
| -rw-r--r-- | drivers/iio/adc/hi8435.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/iio/adc/hi8435.c b/drivers/iio/adc/hi8435.c index 678e8c7ea763..cb8e6342eddf 100644 --- a/drivers/iio/adc/hi8435.c +++ b/drivers/iio/adc/hi8435.c @@ -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, |