staging:iio: dummy driver additions to show shared_by_dir infomask usage

Note that as this driver has output as well as output channels an
example of info_mask_shared_by_all that makes any sense does not exist.

Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>

diff --git a/drivers/staging/iio/iio_simple_dummy.c b/drivers/staging/iio/iio_simple_dummy.c
index 0e8e02a..141ec61 100644 (file)
--- a/drivers/staging/iio/iio_simple_dummy.c
+++ b/drivers/staging/iio/iio_simple_dummy.c
@@ -90,6 +90,11 @@ static const struct iio_chan_spec iio_dummy_channels[] = {
                 * when converting to standard units (microvolts)
                 */
                BIT(IIO_CHAN_INFO_SCALE),
+               /*
+                * sampling_frequency
+                * The frequency in Hz at which the channels are sampled
+                */
+               .info_mask_shared_by_dir = BIT(IIO_CHAN_INFO_SAMP_FREQ),
                /* The ordering of elements in the buffer via an enum */
                .scan_index = voltage0,
                .scan_type = { /* Description of storage in buffer */
@@ -130,6 +135,10 @@ static const struct iio_chan_spec iio_dummy_channels[] = {
                 * input channels of type IIO_VOLTAGE.
                 */
                .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),
+               /*
+                * sampling_frequency
+                * The frequency in Hz at which the channels are sampled
+                */
                .scan_index = diffvoltage1m2,
                .scan_type = { /* Description of storage in buffer */
                        .sign = 's', /* signed */
@@ -147,6 +156,7 @@ static const struct iio_chan_spec iio_dummy_channels[] = {
                .channel2 = 4,
                .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
                .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),
+               .info_mask_shared_by_dir = BIT(IIO_CHAN_INFO_SAMP_FREQ),
                .scan_index = diffvoltage3m4,
                .scan_type = {
                        .sign = 's',
@@ -173,6 +183,7 @@ static const struct iio_chan_spec iio_dummy_channels[] = {
                 */
                BIT(IIO_CHAN_INFO_CALIBSCALE) |
                BIT(IIO_CHAN_INFO_CALIBBIAS),
+               .info_mask_shared_by_dir = BIT(IIO_CHAN_INFO_SAMP_FREQ),
                .scan_index = accelx,
                .scan_type = { /* Description of storage in buffer */
                        .sign = 's', /* signed */
@@ -272,6 +283,11 @@ static int iio_dummy_read_raw(struct iio_dev *indio_dev,
                *val2 = st->accel_calibscale->val2;
                ret = IIO_VAL_INT_PLUS_MICRO;
                break;
+       case IIO_CHAN_INFO_SAMP_FREQ:
+               *val = 3;
+               *val2 = 33;
+               ret = IIO_VAL_INT_PLUS_NANO;
+               break;
        default:
                break;
        }