u-boot/drivers/led/led-uclass.c
Simon Glass fb8a5ffc77 led: Return -ENODEV if the LED device cannot be found
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>
2015-07-21 17:39:32 -06:00

50 lines
989 B
C

/*
* Copyright (c) 2015 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <led.h>
#include <dm/root.h>
#include <dm/uclass-internal.h>
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);
/* Ignore the top-level LED node */
if (uc_plat->label && !strcmp(label, uc_plat->label))
return uclass_get_device_tail(dev, 0, devp);
}
return -ENODEV;
}
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),
};