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leds: class: Add flag to avoid automatic renaming of LED devices

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Add a mechanism for drivers to opt-out of the automatic device renaming
on conflicts.
Those drivers will provide their own conflict resolution.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://lore.kernel.org/r/20240526-cros_ec-kbd-led-framework-v3-2-ee577415a521@weissschuh.net
Signed-off-by: Lee Jones <lee@kernel.org>
This commit is contained in:
Thomas Weißschuh 2024-05-26 20:17:16 +02:00 committed by Lee Jones
parent bfefbecdea
commit 6b0d3355e5
2 changed files with 3 additions and 0 deletions
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2
drivers/leds/led-class.c
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@ -503,6 +503,8 @@ int led_classdev_register_ext(struct device *parent,
ret = led_classdev_next_name(proposed_name, final_name, sizeof(final_name));
if (ret < 0)
return ret;
else if (ret && led_cdev->flags & LED_REJECT_NAME_CONFLICT)
return -EEXIST;
else if (ret)
dev_warn(parent, "Led %s renamed to %s due to name collision\n",
proposed_name, final_name);

1
include/linux/leds.h
View File

@ -107,6 +107,7 @@ struct led_classdev {
#define LED_BRIGHT_HW_CHANGED BIT(21)
#define LED_RETAIN_AT_SHUTDOWN BIT(22)
#define LED_INIT_DEFAULT_TRIGGER BIT(23)
#define LED_REJECT_NAME_CONFLICT BIT(24)
/* set_brightness_work / blink_timer flags, atomic, private. */
unsigned long work_flags;