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authorNikita Yushchenko <nikita.yoush@cogentembedded.com>2017-05-19 17:47:59 +0300
committerJonathan Cameron <jic23@kernel.org>2017-05-20 17:31:33 +0100
commitfa7662e1bddbded1820415907740837baa897721 (patch)
treef6983774fa844be7e419821b68e5c3f55ee20fe7 /drivers/iio/adc/hi8435.c
parent14b39dce373191f8fd7a703a643dccf0f97f0323 (diff)
downloadlinux-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/hi8435.c')
-rw-r--r--drivers/iio/adc/hi8435.c22
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,