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

This reverts commit 5f05285df691b1e82108eead7165feae238c95ef.

This commit assumes that every HID descriptor for ALS sensor has
presence of usage id ID HID_USAGE_SENSOR_LIGHT_COLOR_TEMPERATURE.
When the above usage id is absent, driver probe fails. This breaks
ALS sensor functionality on many platforms.

Till we have a good solution, revert this commit.

Reported-by: Thomas Weißschuh <[e-mail]>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218223
Signed-off-by: Srinivas Pandruvada <[e-mail]>
Cc: <[e-mail]>
Acked-by: Jonathan Cameron <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

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

···
 #include "../common/hid-sensors/hid-sensor-trigger.h"
 
 enum {
-	CHANNEL_SCAN_INDEX_INTENSITY,
-	CHANNEL_SCAN_INDEX_ILLUM,
-	CHANNEL_SCAN_INDEX_COLOR_TEMP,
+	CHANNEL_SCAN_INDEX_INTENSITY = 0,
+	CHANNEL_SCAN_INDEX_ILLUM = 1,
 	CHANNEL_SCAN_INDEX_MAX
 };
 
···
 		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)
 };
 
···
 			report_id = als_state->als[chan->scan_index].report_id;
 			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;
···
 		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);
···
 		dev_dbg(&pdev->dev, "als %x:%x\n", st->als[i].index,
 			st->als[i].report_id);
 	}
-
-	ret = sensor_hub_input_get_attribute_info(hsdev, HID_INPUT_REPORT,
-				usage_id,
-				HID_USAGE_SENSOR_LIGHT_COLOR_TEMPERATURE,
-				&st->als[CHANNEL_SCAN_INDEX_COLOR_TEMP]);
-	if (ret < 0)
-		return ret;
-	als_adjust_channel_bit_mask(channels, CHANNEL_SCAN_INDEX_COLOR_TEMP,
-				st->als[CHANNEL_SCAN_INDEX_COLOR_TEMP].size);
-
-	dev_dbg(&pdev->dev, "als %x:%x\n",
-		st->als[CHANNEL_SCAN_INDEX_COLOR_TEMP].index,
-		st->als[CHANNEL_SCAN_INDEX_COLOR_TEMP].report_id);
 
 	st->scale_precision = hid_sensor_format_scale(usage_id,
 				&st->als[CHANNEL_SCAN_INDEX_INTENSITY],

include/linux/hid-sensor-ids.h

···
 #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