iio: pressure: ms5611: Add IIO_CHAN_INFO_SCALE to mask

This allows data exported via buffer interface to be converted
to standard units in userspace.

Signed-off-by: Daniel Baluta <daniel.baluta@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

diff --git a/drivers/iio/pressure/ms5611_core.c b/drivers/iio/pressure/ms5611_core.c
index 2f3d9b4aca4ec695b99f75e53e93af6107bf1d01..6cf0e55380aa1910458dcd780e7b319ca8f78b8e 100644 (file)
--- a/drivers/iio/pressure/ms5611_core.c
+++ b/drivers/iio/pressure/ms5611_core.c
@@ -201,6 +201,18 @@ static int ms5611_read_raw(struct iio_dev *indio_dev,
                default:
                        return -EINVAL;
                }
+       case IIO_CHAN_INFO_SCALE:
+               switch (chan->type) {
+               case IIO_TEMP:
+                       *val = 10;
+                       return IIO_VAL_INT;
+               case IIO_PRESSURE:
+                       *val = 0;
+                       *val2 = 1000;
+                       return IIO_VAL_INT_PLUS_MICRO;
+               default:
+                       return -EINVAL;
+               }
        }
 
        return -EINVAL;
@@ -218,11 +230,13 @@ static struct ms5611_chip_info chip_info_tbl[] = {
 static const struct iio_chan_spec ms5611_channels[] = {
        {
                .type = IIO_PRESSURE,
-               .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
+               .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
+                       BIT(IIO_CHAN_INFO_SCALE),
        },
        {
                .type = IIO_TEMP,
-               .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
+               .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
+                       BIT(IIO_CHAN_INFO_SCALE),
        }
 };