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"Das U-Boot" Source Tree
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 <button.h>
11#include <dm.h>
12#include <dm/uclass-internal.h>
13#include <dt-bindings/input/linux-event-codes.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
41static int button_remap_phone_keys(int code)
42{
43 switch (code) {
44 case KEY_VOLUMEUP:
45 return KEY_UP;
46 case KEY_VOLUMEDOWN:
47 return KEY_DOWN;
48 case KEY_POWER:
49 return KEY_ENTER;
50 default:
51 return code;
52 }
53}
54
55int button_get_code(struct udevice *dev)
56{
57 struct button_ops *ops = button_get_ops(dev);
58 int code;
59
60 if (!ops->get_code)
61 return -ENOSYS;
62
63 code = ops->get_code(dev);
64 if (CONFIG_IS_ENABLED(BUTTON_REMAP_PHONE_KEYS))
65 return button_remap_phone_keys(code);
66 else
67 return code;
68}
69
70UCLASS_DRIVER(button) = {
71 .id = UCLASS_BUTTON,
72 .name = "button",
73 .per_device_plat_auto = sizeof(struct button_uc_plat),
74};