From: Basavaraj Natikar <Basavaraj.Natikar@xxxxxxx>
On some platforms, ambient color sensors also support the x and y light
colors, which represent the coordinates on the CIE 1931 chromaticity
diagram. Add light chromaticity x and y.
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@xxxxxxx>
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@xxxxxxxxxxxxxxx>
---
I don't have a system to test this patch.
Hi Basavraj,
Please test.
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 | 48 ++++++++++++++++++++++++++++++
include/linux/hid-sensor-ids.h | 3 ++
2 files changed, 51 insertions(+)
diff --git a/drivers/iio/light/hid-sensor-als.c b/drivers/iio/light/hid-sensor-als.c
index 0d54eb59e47d..9c31febc84b8 100644
--- a/drivers/iio/light/hid-sensor-als.c
+++ b/drivers/iio/light/hid-sensor-als.c
@@ -17,6 +17,8 @@ enum {
CHANNEL_SCAN_INDEX_INTENSITY,
CHANNEL_SCAN_INDEX_ILLUM,
CHANNEL_SCAN_INDEX_COLOR_TEMP,
+ CHANNEL_SCAN_INDEX_CHROMATICITY_X,
+ CHANNEL_SCAN_INDEX_CHROMATICITY_Y,
CHANNEL_SCAN_INDEX_MAX
};
@@ -45,6 +47,8 @@ static const u32 als_usage_ids[] = {
HID_USAGE_SENSOR_LIGHT_ILLUM,
HID_USAGE_SENSOR_LIGHT_ILLUM,
HID_USAGE_SENSOR_LIGHT_COLOR_TEMPERATURE,
+ HID_USAGE_SENSOR_LIGHT_CHROMATICITY_X,
+ HID_USAGE_SENSOR_LIGHT_CHROMATICITY_Y,
};
static const u32 als_sensitivity_addresses[] = {
@@ -86,6 +90,30 @@ static const struct iio_chan_spec als_channels[] = {
BIT(IIO_CHAN_INFO_HYSTERESIS_RELATIVE),
.scan_index = CHANNEL_SCAN_INDEX_COLOR_TEMP,
},
+ {
+ .type = IIO_CHROMATICITY,
+ .modified = 1,
+ .channel2 = IIO_MOD_X,
+ .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_CHROMATICITY_X,
+ },
+ {
+ .type = IIO_CHROMATICITY,
+ .modified = 1,
+ .channel2 = IIO_MOD_Y,
+ .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_CHROMATICITY_Y,
+ },
IIO_CHAN_SOFT_TIMESTAMP(CHANNEL_SCAN_INDEX_TIMESTAMP)
};
@@ -129,6 +157,16 @@ static int als_read_raw(struct iio_dev *indio_dev,
min = als_state->als[chan->scan_index].logical_minimum;
address = HID_USAGE_SENSOR_LIGHT_COLOR_TEMPERATURE;
break;
+ case CHANNEL_SCAN_INDEX_CHROMATICITY_X:
+ report_id = als_state->als[chan->scan_index].report_id;
+ min = als_state->als[chan->scan_index].logical_minimum;
+ address = HID_USAGE_SENSOR_LIGHT_CHROMATICITY_X;
+ break;
+ case CHANNEL_SCAN_INDEX_CHROMATICITY_Y:
+ report_id = als_state->als[chan->scan_index].report_id;
+ min = als_state->als[chan->scan_index].logical_minimum;
+ address = HID_USAGE_SENSOR_LIGHT_CHROMATICITY_Y;
+ break;
default:
report_id = -1;
break;
@@ -257,6 +295,16 @@ static int als_capture_sample(struct hid_sensor_hub_device *hsdev,
als_state->scan.illum[scan_index] = sample_data;
ret = 0;
break;
+ case HID_USAGE_SENSOR_LIGHT_CHROMATICITY_X:
+ scan_index = als_state->scan.scan_index[CHANNEL_SCAN_INDEX_CHROMATICITY_X];
+ als_state->scan.illum[scan_index] = sample_data;
+ ret = 0;
+ break;
+ case HID_USAGE_SENSOR_LIGHT_CHROMATICITY_Y:
+ scan_index = als_state->scan.scan_index[CHANNEL_SCAN_INDEX_CHROMATICITY_Y];
+ als_state->scan.illum[scan_index] = 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 8af4fb3e0254..6730ee900ee1 100644
--- a/include/linux/hid-sensor-ids.h
+++ b/include/linux/hid-sensor-ids.h
@@ -22,6 +22,9 @@
#define HID_USAGE_SENSOR_DATA_LIGHT 0x2004d0
#define HID_USAGE_SENSOR_LIGHT_ILLUM 0x2004d1
#define HID_USAGE_SENSOR_LIGHT_COLOR_TEMPERATURE 0x2004d2
+#define HID_USAGE_SENSOR_LIGHT_CHROMATICITY 0x2004d3
+#define HID_USAGE_SENSOR_LIGHT_CHROMATICITY_X 0x2004d4
+#define HID_USAGE_SENSOR_LIGHT_CHROMATICITY_Y 0x2004d5
/* PROX (200011) */
#define HID_USAGE_SENSOR_PROX 0x200011
--
2.43.0
