Revert "Revert "leds: class: Store the color index in struct led_classdev""

This reverts commit 7893eca.

Author: jackpot51

drivers/leds/led-class.c

@@ -491,6 +491,10 @@ int led_classdev_register_ext(struct device *parent,
 			fwnode_property_read_u32(init_data->fwnode,
 				"max-brightness",
 				&led_cdev->max_brightness);
+
+			if (fwnode_property_present(init_data->fwnode, "color"))
+				fwnode_property_read_u32(init_data->fwnode, "color",
+							 &led_cdev->color);
 		}
 	} else {
 		proposed_name = led_cdev->name;
@@ -500,6 +504,9 @@ int led_classdev_register_ext(struct device *parent,
 	if (ret < 0)
 		return ret;
 
+	if (led_cdev->color >= LED_COLOR_ID_MAX)
+		dev_warn(parent, "LED %s color identifier out of range\n", final_name);
+
 	mutex_init(&led_cdev->led_access);
 	mutex_lock(&led_cdev->led_access);
 	led_cdev->dev = device_create_with_groups(&leds_class, parent, 0,

include/linux/leds.h

@@ -100,6 +100,7 @@ struct led_classdev {
 	const char		*name;
 	unsigned int brightness;
 	unsigned int max_brightness;
+	unsigned int color;
 	int			 flags;
 
 	/* Lower 16 bits reflect status */