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 --- drivers/led/led-uclass.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 drivers/led/led-uclass.c (limited to 'drivers/led/led-uclass.c') diff --git a/drivers/led/led-uclass.c b/drivers/led/led-uclass.c new file mode 100644 index 0000000000..a80ae93d45 --- /dev/null +++ b/drivers/led/led-uclass.c @@ -0,0 +1,48 @@ +/* + * Copyright (c) 2015 Google, Inc + * Written by Simon Glass + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include +#include +#include +#include +#include + +int led_get_by_label(const char *label, struct udevice **devp) +{ + struct udevice *dev; + struct uclass *uc; + int ret; + + ret = uclass_get(UCLASS_LED, &uc); + if (ret) + return ret; + uclass_foreach_dev(dev, uc) { + struct led_uclass_plat *uc_plat = dev_get_uclass_platdata(dev); + + if (!strcmp(label, uc_plat->label)) + return uclass_get_device_tail(dev, 0, devp); + } + + return -ENOENT; +} + +int led_set_on(struct udevice *dev, int on) +{ + struct led_ops *ops = led_get_ops(dev); + + if (!ops->set_on) + return -ENOSYS; + + return ops->set_on(dev, on); +} + +UCLASS_DRIVER(led) = { + .id = UCLASS_LED, + .name = "led", + .per_device_platdata_auto_alloc_size = sizeof(struct led_uclass_plat), +}; -- cgit v1.2.1