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leds: core: Introduce led_get_color_name() function

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This is similar to the existing led_colors[] array but is safer to use and
usable by everyone.

Getting string representations of color ids is useful for drivers
which are handling color IDs anyways, for example for the multicolor API.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://lore.kernel.org/r/20240613-cros_ec-led-v3-1-500b50f41e0f@weissschuh.net
Signed-off-by: Lee Jones <lee@kernel.org>
This commit is contained in:
Thomas Weißschuh 2024-06-13 16:48:36 +02:00 committed by Lee Jones
parent 1613e604df
commit 5f2e950755
2 changed files with 19 additions and 0 deletions
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9
drivers/leds/led-core.c
View File

@ -534,6 +534,15 @@ int led_compose_name(struct device *dev, struct led_init_data *init_data,
}
EXPORT_SYMBOL_GPL(led_compose_name);
const char *led_get_color_name(u8 color_id)
{
if (color_id >= ARRAY_SIZE(led_colors))
return NULL;
return led_colors[color_id];
}
EXPORT_SYMBOL_GPL(led_get_color_name);
enum led_default_state led_init_default_state_get(struct fwnode_handle *fwnode)
{
const char *state = NULL;

10
include/linux/leds.h
View File

@ -427,6 +427,16 @@ void led_sysfs_enable(struct led_classdev *led_cdev);
int led_compose_name(struct device *dev, struct led_init_data *init_data,
char *led_classdev_name);
/**
* led_get_color_name - get string representation of color ID
* @color_id: The LED_COLOR_ID_* constant
*
* Get the string name of a LED_COLOR_ID_* constant.
*
* Returns: A string constant or NULL on an invalid ID.
*/
const char *led_get_color_name(u8 color_id);
/**
* led_sysfs_is_disabled - check if LED sysfs interface is disabled
* @led_cdev: the LED to query