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

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Copyright (C) 2020 Philippe Reynes <philippe.reynes@softathome.com>
   4 *
   5 * Based on led-uclass.c
   6 */
   7
   8#define LOG_CATEGORY UCLASS_BUTTON
   9
  10#include <common.h>
  11#include <button.h>
  12#include <dm.h>
  13#include <dm/uclass-internal.h>
  14
  15int button_get_by_label(const char *label, struct udevice **devp)
  16{
  17        struct udevice *dev;
  18        struct uclass *uc;
  19
  20        uclass_id_foreach_dev(UCLASS_BUTTON, dev, uc) {
  21                struct button_uc_plat *uc_plat = dev_get_uclass_plat(dev);
  22
  23                /* Ignore the top-level button node */
  24                if (uc_plat->label && !strcmp(label, uc_plat->label))
  25                        return uclass_get_device_tail(dev, 0, devp);
  26        }
  27
  28        return -ENODEV;
  29}
  30
  31enum button_state_t button_get_state(struct udevice *dev)
  32{
  33        struct button_ops *ops = button_get_ops(dev);
  34
  35        if (!ops->get_state)
  36                return -ENOSYS;
  37
  38        return ops->get_state(dev);
  39}
  40
  41UCLASS_DRIVER(button) = {
  42        .id             = UCLASS_BUTTON,
  43        .name           = "button",
  44        .per_device_plat_auto   = sizeof(struct button_uc_plat),
  45};
  46