blob: 84ad1653c7b5b1dcdfb0089cd0756548cb7280a5 [file] [log] [blame]
Philippe Reynes325141a2020-07-24 18:19:47 +02001// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2020 Philippe Reynes <philippe.reynes@softathome.com>
4 *
5 * Based on led.c
6 */
7
8#include <common.h>
9#include <command.h>
10#include <dm.h>
11#include <button.h>
12#include <dm/uclass-internal.h>
13
14static const char *const state_label[] = {
15 [BUTTON_OFF] = "off",
16 [BUTTON_ON] = "on",
17};
18
19static int show_button_state(struct udevice *dev)
20{
21 int ret;
22
23 ret = button_get_state(dev);
24 if (ret >= BUTTON_COUNT)
25 ret = -EINVAL;
26 if (ret >= 0)
27 printf("%s\n", state_label[ret]);
28
29 return ret;
30}
31
32static int list_buttons(void)
33{
34 struct udevice *dev;
35 int ret;
36
37 for (uclass_find_first_device(UCLASS_BUTTON, &dev);
38 dev;
39 uclass_find_next_device(&dev)) {
40 struct button_uc_plat *plat = dev_get_uclass_platdata(dev);
41
42 if (!plat->label)
43 continue;
44 printf("%-15s ", plat->label);
45 if (device_active(dev)) {
46 ret = show_button_state(dev);
47 if (ret < 0)
48 printf("Error %d\n", ret);
49 } else {
50 printf("<inactive>\n");
51 }
52 }
53
54 return 0;
55}
56
57int do_button(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
58{
59 const char *button_label;
60 struct udevice *dev;
61 int ret;
62
63 /* Validate arguments */
64 if (argc < 2)
65 return CMD_RET_USAGE;
66 button_label = argv[1];
67 if (strncmp(button_label, "list", 4) == 0)
68 return list_buttons();
69
70 ret = button_get_by_label(button_label, &dev);
71 if (ret) {
72 printf("Button '%s' not found (err=%d)\n", button_label, ret);
73 return CMD_RET_FAILURE;
74 }
75
76 ret = show_button_state(dev);
77
78 return 0;
79}
80
81U_BOOT_CMD(
82 button, 4, 1, do_button,
83 "manage buttons",
84 "<button_label> \tGet button state\n"
85 "button list\t\tShow a list of buttons"
86);