blob: 50ffa509abfeb77423436e52972e51de05fe83fa [file] [log] [blame]
Tom Rini83d290c2018-05-06 17:58:06 -04001// SPDX-License-Identifier: GPL-2.0+
Simon Glassffe20522017-04-10 11:34:59 -06002/*
3 * Copyright (c) 2017 Google, Inc
4 * Written by Simon Glass <sjg@chromium.org>
Simon Glassffe20522017-04-10 11:34:59 -06005 */
6
7#include <common.h>
8#include <command.h>
9#include <dm.h>
10#include <led.h>
11#include <dm/uclass-internal.h>
12
13#define LED_TOGGLE LEDST_COUNT
14
15static const char *const state_label[] = {
16 [LEDST_OFF] = "off",
17 [LEDST_ON] = "on",
18 [LEDST_TOGGLE] = "toggle",
19#ifdef CONFIG_LED_BLINK
20 [LEDST_BLINK] = "blink",
21#endif
22};
23
24enum led_state_t get_led_cmd(char *var)
25{
26 int i;
27
28 for (i = 0; i < LEDST_COUNT; i++) {
29 if (!strncmp(var, state_label[i], strlen(var)))
30 return i;
31 }
32
33 return -1;
34}
35
36static int show_led_state(struct udevice *dev)
37{
38 int ret;
39
40 ret = led_get_state(dev);
41 if (ret >= LEDST_COUNT)
42 ret = -EINVAL;
43 if (ret >= 0)
44 printf("%s\n", state_label[ret]);
45
46 return ret;
47}
48
49static int list_leds(void)
50{
51 struct udevice *dev;
52 int ret;
53
54 for (uclass_find_first_device(UCLASS_LED, &dev);
55 dev;
56 uclass_find_next_device(&dev)) {
57 struct led_uc_plat *plat = dev_get_uclass_platdata(dev);
58
59 if (!plat->label)
60 continue;
61 printf("%-15s ", plat->label);
62 if (device_active(dev)) {
63 ret = show_led_state(dev);
64 if (ret < 0)
65 printf("Error %d\n", ret);
66 } else {
67 printf("<inactive>\n");
68 }
69 }
70
71 return 0;
72}
73
74int do_led(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
75{
76 enum led_state_t cmd;
77 const char *led_label;
78 struct udevice *dev;
79#ifdef CONFIG_LED_BLINK
80 int freq_ms = 0;
81#endif
82 int ret;
83
84 /* Validate arguments */
85 if (argc < 2)
86 return CMD_RET_USAGE;
87 led_label = argv[1];
Heiko Schocherea41b152019-05-27 08:14:16 +020088 if (strncmp(led_label, "list", 4) == 0)
Simon Glassffe20522017-04-10 11:34:59 -060089 return list_leds();
90
91 cmd = argc > 2 ? get_led_cmd(argv[2]) : LEDST_COUNT;
Simon Glassffe20522017-04-10 11:34:59 -060092#ifdef CONFIG_LED_BLINK
93 if (cmd == LEDST_BLINK) {
94 if (argc < 4)
95 return CMD_RET_USAGE;
96 freq_ms = simple_strtoul(argv[3], NULL, 10);
97 }
98#endif
99 ret = led_get_by_label(led_label, &dev);
100 if (ret) {
101 printf("LED '%s' not found (err=%d)\n", led_label, ret);
102 return CMD_RET_FAILURE;
103 }
104 switch (cmd) {
105 case LEDST_OFF:
106 case LEDST_ON:
107 case LEDST_TOGGLE:
108 ret = led_set_state(dev, cmd);
109 break;
110#ifdef CONFIG_LED_BLINK
111 case LEDST_BLINK:
112 ret = led_set_period(dev, freq_ms);
113 if (!ret)
114 ret = led_set_state(dev, LEDST_BLINK);
115 break;
116#endif
117 case LEDST_COUNT:
118 printf("LED '%s': ", led_label);
119 ret = show_led_state(dev);
120 break;
121 }
122 if (ret < 0) {
123 printf("LED '%s' operation failed (err=%d)\n", led_label, ret);
124 return CMD_RET_FAILURE;
125 }
126
127 return 0;
128}
129
130#ifdef CONFIG_LED_BLINK
131#define BLINK "|blink [blink-freq in ms]"
132#else
133#define BLINK ""
134#endif
135
136U_BOOT_CMD(
137 led, 4, 1, do_led,
138 "manage LEDs",
139 "<led_label> on|off|toggle" BLINK "\tChange LED state\n"
Anatolij Gustschinfb7b7902019-06-17 15:33:55 +0200140 "led <led_label>\tGet LED state\n"
Simon Glassffe20522017-04-10 11:34:59 -0600141 "led list\t\tshow a list of LEDs"
142);