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 #include <common.h>
9 #include <button.h>
10 #include <dm.h>
11 #include <dm/uclass-internal.h>
12
button_get_by_label(const char * label,struct udevice ** devp)13 int button_get_by_label(const char *label, struct udevice **devp)
14 {
15 struct udevice *dev;
16 struct uclass *uc;
17
18 uclass_id_foreach_dev(UCLASS_BUTTON, dev, uc) {
19 struct button_uc_plat *uc_plat = dev_get_uclass_plat(dev);
20
21 /* Ignore the top-level button node */
22 if (uc_plat->label && !strcmp(label, uc_plat->label))
23 return uclass_get_device_tail(dev, 0, devp);
24 }
25
26 return -ENODEV;
27 }
28
button_get_state(struct udevice * dev)29 enum button_state_t button_get_state(struct udevice *dev)
30 {
31 struct button_ops *ops = button_get_ops(dev);
32
33 if (!ops->get_state)
34 return -ENOSYS;
35
36 return ops->get_state(dev);
37 }
38
39 UCLASS_DRIVER(button) = {
40 .id = UCLASS_BUTTON,
41 .name = "button",
42 .per_device_plat_auto = sizeof(struct button_uc_plat),
43 };
44