LXR uboot/drivers/led/led-uclass.c

   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#include <common.h>
   9#include <dm.h>
  10#include <errno.h>
  11#include <led.h>
  12#include <dm/root.h>
  13#include <dm/uclass-internal.h>
  14
  15int led_get_by_label(const char *label, struct udevice **devp)
  16{
  17        struct udevice *dev;
  18        struct uclass *uc;
  19        int ret;
  20
  21        ret = uclass_get(UCLASS_LED, &uc);
  22        if (ret)
  23                return ret;
  24        uclass_foreach_dev(dev, uc) {
  25                struct led_uclass_plat *uc_plat = dev_get_uclass_platdata(dev);
  26
  27                /* Ignore the top-level LED node */
  28                if (uc_plat->label && !strcmp(label, uc_plat->label))
  29                        return uclass_get_device_tail(dev, 0, devp);
  30        }
  31
  32        return -ENODEV;
  33}
  34
  35int led_set_on(struct udevice *dev, int on)
  36{
  37        struct led_ops *ops = led_get_ops(dev);
  38
  39        if (!ops->set_on)
  40                return -ENOSYS;
  41
  42        return ops->set_on(dev, on);
  43}
  44
  45UCLASS_DRIVER(led) = {
  46        .id             = UCLASS_LED,
  47        .name           = "led",
  48        .per_device_platdata_auto_alloc_size = sizeof(struct led_uclass_plat),
  49};
  50