[PATCH 2/3] iio: hid-sensor-als: Add relative hysteresis support

[Ye Xiang]

Hid sensor als uses relative hysteresis, this patch adds the support.

Signed-off-by: Ye Xiang <xiang...@intel.com>
---
 drivers/iio/light/hid-sensor-als.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/iio/light/hid-sensor-als.c 
b/drivers/iio/light/hid-sensor-als.c
index afcdb424bfb8..85c8a05b73cb 100644
--- a/drivers/iio/light/hid-sensor-als.c
+++ b/drivers/iio/light/hid-sensor-als.c
@@ -54,7 +54,8 @@ static const struct iio_chan_spec als_channels[] = {
                .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
                BIT(IIO_CHAN_INFO_SCALE) |
                BIT(IIO_CHAN_INFO_SAMP_FREQ) |
-               BIT(IIO_CHAN_INFO_HYSTERESIS),
+               BIT(IIO_CHAN_INFO_HYSTERESIS) |
+               BIT(IIO_CHAN_INFO_HYSTERESIS_RELATIVE),
                .scan_index = CHANNEL_SCAN_INDEX_INTENSITY,
        },
        {
@@ -63,7 +64,8 @@ static const struct iio_chan_spec als_channels[] = {
                .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
                BIT(IIO_CHAN_INFO_SCALE) |
                BIT(IIO_CHAN_INFO_SAMP_FREQ) |
-               BIT(IIO_CHAN_INFO_HYSTERESIS),
+               BIT(IIO_CHAN_INFO_HYSTERESIS) |
+               BIT(IIO_CHAN_INFO_HYSTERESIS_RELATIVE),
                .scan_index = CHANNEL_SCAN_INDEX_ILLUM,
        },
        IIO_CHAN_SOFT_TIMESTAMP(CHANNEL_SCAN_INDEX_TIMESTAMP)
@@ -141,6 +143,10 @@ static int als_read_raw(struct iio_dev *indio_dev,
                ret_type = hid_sensor_read_raw_hyst_value(
                                &als_state->common_attributes, val, val2);
                break;
+       case IIO_CHAN_INFO_HYSTERESIS_RELATIVE:
+               ret_type = hid_sensor_read_raw_hyst_rel_value(
+                               &als_state->common_attributes, val, val2);
+               break;
        default:
                ret_type = -EINVAL;
                break;
@@ -168,6 +174,10 @@ static int als_write_raw(struct iio_dev *indio_dev,
                ret = hid_sensor_write_raw_hyst_value(
                                &als_state->common_attributes, val, val2);
                break;
+       case IIO_CHAN_INFO_HYSTERESIS_RELATIVE:
+               ret = hid_sensor_write_raw_hyst_rel_value(
+                               &als_state->common_attributes, val, val2);
+               break;
        default:
                ret = -EINVAL;
        }
-- 
2.17.1