1 /* 2 * Copyright (c) 2015 Google, Inc 3 * Written by Simon Glass <sjg@chromium.org> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #ifndef __LED_H 9 #define __LED_H 10 11 /** 12 * struct led_uclass_plat - Platform data the uclass stores about each device 13 * 14 * @label: LED label 15 */ 16 struct led_uclass_plat { 17 const char *label; 18 }; 19 20 struct led_ops { 21 /** 22 * set_on() - set the state of an LED 23 * 24 * @dev: LED device to change 25 * @on: 1 to turn the LED on, 0 to turn it off 26 * @return 0 if OK, -ve on error 27 */ 28 int (*set_on)(struct udevice *dev, int on); 29 }; 30 31 #define led_get_ops(dev) ((struct led_ops *)(dev)->driver->ops) 32 33 /** 34 * led_get_by_label() - Find an LED device by label 35 * 36 * @label: LED label to look up 37 * @devp: Returns the associated device, if found 38 * @return 0 if found, -ENODEV if not found, other -ve on error 39 */ 40 int led_get_by_label(const char *label, struct udevice **devp); 41 42 /** 43 * led_set_on() - set the state of an LED 44 * 45 * @dev: LED device to change 46 * @on: 1 to turn the LED on, 0 to turn it off 47 * @return 0 if OK, -ve on error 48 */ 49 int led_set_on(struct udevice *dev, int on); 50 51 #endif 52