Commit 3765d426 authored by Basavaraj Natikar's avatar Basavaraj Natikar Committed by Jonathan Cameron
Browse files

iio: hid-sensor-als: Add light color temperature support 



On some platforms, ambient color sensors also support light color
temperature. Add support of light color temperature.

Signed-off-by: default avatarBasavaraj Natikar <Basavaraj.Natikar@amd.com>
Signed-off-by: default avatarSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://lore.kernel.org/r/20240205185926.3030521-4-srinivas.pandruvada@linux.intel.com


Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent 00c45c9e

drivers/iio/light/hid-sensor-als.c

+21 −0
Original line number Diff line number Diff line
@@ -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);

include/linux/hid-sensor-ids.h

+1 −0
Original line number Diff line number Diff line
@@ -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