mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-05 20:54:31 +00:00
fb8a5ffc77
We normally use -ENODEV for a missing device, rather than -ENOENT. The latter is reserved for when we have a device but cannot find something within it. Also avoid looking at the root LED device since it is only a container. Signed-off-by: Simon Glass <sjg@chromium.org>
51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
/*
|
|
* Copyright (c) 2015 Google, Inc
|
|
* Written by Simon Glass <sjg@chromium.org>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#ifndef __LED_H
|
|
#define __LED_H
|
|
|
|
/**
|
|
* struct led_uclass_plat - Platform data the uclass stores about each device
|
|
*
|
|
* @label: LED label
|
|
*/
|
|
struct led_uclass_plat {
|
|
const char *label;
|
|
};
|
|
|
|
struct led_ops {
|
|
/**
|
|
* set_on() - set the state of an LED
|
|
*
|
|
* @dev: LED device to change
|
|
* @on: 1 to turn the LED on, 0 to turn it off
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int (*set_on)(struct udevice *dev, int on);
|
|
};
|
|
|
|
#define led_get_ops(dev) ((struct led_ops *)(dev)->driver->ops)
|
|
|
|
/**
|
|
* led_get_by_label() - Find an LED device by label
|
|
*
|
|
* @label: LED label to look up
|
|
* @devp: Returns the associated device, if found
|
|
* @return 0 if found, -ENODEV if not found, other -ve on error
|
|
*/
|
|
int led_get_by_label(const char *label, struct udevice **devp);
|
|
|
|
/**
|
|
* led_set_on() - set the state of an LED
|
|
*
|
|
* @dev: LED device to change
|
|
* @on: 1 to turn the LED on, 0 to turn it off
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int led_set_on(struct udevice *dev, int on);
|
|
|
|
#endif
|