From: Basavaraj Natikar <Basavaraj.Natikar@xxxxxxx>
On some platforms, ambient color sensors also support light color
temperature. Add support of light color temperature.
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@xxxxxxx>
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@xxxxxxxxxxxxxxx>
---
v5:
No change
v4:
- Index is fixed for each channel instead of packing for absent channels
v3:
Simplilified as no special processing is required in als_parse_report()
v2:
Original patch from Basavaraj Natikar <Basavaraj.Natikar@xxxxxxx> is
modified to prevent failure when the new usage id is not found in the
descriptor.
drivers/iio/light/hid-sensor-als.c | 21 +++++++++++++++++++++
include/linux/hid-sensor-ids.h | 1 +
2 files changed, 22 insertions(+)
diff --git a/drivers/iio/light/hid-sensor-als.c b/drivers/iio/light/hid-sensor-als.c
index 144c02fbbbc0..c17902823629 100644
--- a/drivers/iio/light/hid-sensor-als.c
+++ b/drivers/iio/light/hid-sensor-als.c
@@ -16,6 +16,7 @@
enum {
CHANNEL_SCAN_INDEX_INTENSITY,
CHANNEL_SCAN_INDEX_ILLUM,
+ CHANNEL_SCAN_INDEX_COLOR_TEMP,
CHANNEL_SCAN_INDEX_MAX
};
@@ -43,6 +44,7 @@ struct als_state {
static const u32 als_usage_ids[] = {
HID_USAGE_SENSOR_LIGHT_ILLUM,
HID_USAGE_SENSOR_LIGHT_ILLUM,
+ HID_USAGE_SENSOR_LIGHT_COLOR_TEMPERATURE,
};
static const u32 als_sensitivity_addresses[] = {
@@ -74,6 +76,16 @@ static const struct iio_chan_spec als_channels[] = {
BIT(IIO_CHAN_INFO_HYSTERESIS_RELATIVE),
.scan_index = CHANNEL_SCAN_INDEX_ILLUM,
},
+ {
+ .type = IIO_COLORTEMP,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .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_RELATIVE),
+ .scan_index = CHANNEL_SCAN_INDEX_COLOR_TEMP,
+ },
IIO_CHAN_SOFT_TIMESTAMP(CHANNEL_SCAN_INDEX_TIMESTAMP)
};
@@ -112,6 +124,11 @@ static int als_read_raw(struct iio_dev *indio_dev,
min = als_state->als[chan->scan_index].logical_minimum;
address = HID_USAGE_SENSOR_LIGHT_ILLUM;
break;
+ case CHANNEL_SCAN_INDEX_COLOR_TEMP:
+ report_id = als_state->als[chan->scan_index].report_id;
+ min = als_state->als[chan->scan_index].logical_minimum;
+ address = HID_USAGE_SENSOR_LIGHT_COLOR_TEMPERATURE;
+ break;
default:
report_id = -1;
break;
@@ -232,6 +249,10 @@ static int als_capture_sample(struct hid_sensor_hub_device *hsdev,
als_state->scan.illum[CHANNEL_SCAN_INDEX_ILLUM] = sample_data;
ret = 0;
break;
+ case HID_USAGE_SENSOR_LIGHT_COLOR_TEMPERATURE:
+ als_state->scan.illum[CHANNEL_SCAN_INDEX_COLOR_TEMP] = sample_data;
+ ret = 0;
+ break;
case HID_USAGE_SENSOR_TIME_TIMESTAMP:
als_state->timestamp = hid_sensor_convert_timestamp(&als_state->common_attributes,
*(s64 *)raw_data);
diff --git a/include/linux/hid-sensor-ids.h b/include/linux/hid-sensor-ids.h
index 13b1e65fbdcc..8af4fb3e0254 100644
--- a/include/linux/hid-sensor-ids.h
+++ b/include/linux/hid-sensor-ids.h
@@ -21,6 +21,7 @@
#define HID_USAGE_SENSOR_ALS 0x200041
#define HID_USAGE_SENSOR_DATA_LIGHT 0x2004d0
#define HID_USAGE_SENSOR_LIGHT_ILLUM 0x2004d1
+#define HID_USAGE_SENSOR_LIGHT_COLOR_TEMPERATURE 0x2004d2
/* PROX (200011) */
#define HID_USAGE_SENSOR_PROX 0x200011
--
2.43.0
