From 5917112c9e9f7a60062c604b3224bd5713c41f46 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Tue, 23 Jun 2015 15:38:45 -0600 Subject: dm: Add support for LEDs Add a simple uclass for LEDs, so that these can be controlled by the device tree and activated when needed. LEDs are referred to by their label. This implementation requires a driver for each type of LED (e.g GPIO, I2C). Signed-off-by: Simon Glass --- include/led.h | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 include/led.h (limited to 'include/led.h') diff --git a/include/led.h b/include/led.h new file mode 100644 index 0000000000..8925d75bcf --- /dev/null +++ b/include/led.h @@ -0,0 +1,51 @@ +/* + * Copyright (c) 2015 Google, Inc + * Written by Simon Glass + * + * 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, -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 -- cgit v1.2.1