| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * Copyright (c) 2017 Google, Inc |
| * Written by Simon Glass <sjg@chromium.org> |
| */ |
| |
| #include <common.h> |
| #include <command.h> |
| #include <dm.h> |
| #include <led.h> |
| #include <dm/uclass-internal.h> |
| |
| #define LED_TOGGLE LEDST_COUNT |
| |
| static const char *const state_label[] = { |
| [LEDST_OFF] = "off", |
| [LEDST_ON] = "on", |
| [LEDST_TOGGLE] = "toggle", |
| #ifdef CONFIG_LED_BLINK |
| [LEDST_BLINK] = "blink", |
| #endif |
| #ifdef CONFIG_AML_LED_PWM |
| [LEDST_SET_BRIGHTNESS] = "set_brightness", |
| [LEDST_GET_BRIGHTNESS] = "get_brightness", |
| #endif |
| }; |
| |
| enum led_state_t get_led_cmd(char *var) |
| { |
| int i; |
| |
| for (i = 0; i < LEDST_COUNT; i++) { |
| if (!strncmp(var, state_label[i], strlen(var))) |
| return i; |
| } |
| |
| return -1; |
| } |
| |
| static int show_led_state(struct udevice *dev) |
| { |
| int ret; |
| |
| ret = led_get_state(dev); |
| if (ret >= LEDST_COUNT) |
| ret = -EINVAL; |
| if (ret >= 0) |
| printf("%s\n", state_label[ret]); |
| |
| return ret; |
| } |
| |
| static int list_leds(void) |
| { |
| struct udevice *dev; |
| int ret; |
| |
| for (uclass_find_first_device(UCLASS_LED, &dev); |
| dev; |
| uclass_find_next_device(&dev)) { |
| struct led_uc_plat *plat = dev_get_uclass_platdata(dev); |
| |
| if (!plat->label) |
| continue; |
| printf("%-15s ", plat->label); |
| if (device_active(dev)) { |
| ret = show_led_state(dev); |
| if (ret < 0) |
| printf("Error %d\n", ret); |
| } else { |
| printf("<inactive>\n"); |
| } |
| } |
| |
| return 0; |
| } |
| |
| int do_led(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) |
| { |
| enum led_state_t cmd; |
| const char *led_label; |
| struct udevice *dev; |
| #ifdef CONFIG_LED_BLINK |
| int freq_ms = 0; |
| #endif |
| #ifdef CONFIG_AML_LED_PWM |
| int brightness = 0; |
| #endif |
| int ret; |
| |
| /* Validate arguments */ |
| if (argc < 2) |
| return CMD_RET_USAGE; |
| led_label = argv[1]; |
| if (!strncmp(led_label, "list", 4)) |
| return list_leds(); |
| |
| cmd = argc > 2 ? get_led_cmd(argv[2]) : LEDST_COUNT; |
| #ifdef CONFIG_LED_BLINK |
| if (cmd == LEDST_BLINK) { |
| if (argc < 4) |
| return CMD_RET_USAGE; |
| freq_ms = simple_strtoul(argv[3], NULL, 10); |
| } |
| #endif |
| #ifdef CONFIG_AML_LED_PWM |
| if (cmd == LEDST_SET_BRIGHTNESS) { |
| if (argc < 4) |
| return CMD_RET_USAGE; |
| brightness = simple_strtoul(argv[3], NULL, 10); |
| } |
| #endif |
| ret = led_get_by_label(led_label, &dev); |
| if (ret) { |
| printf("LED '%s' not found (err=%d)\n", led_label, ret); |
| return CMD_RET_FAILURE; |
| } |
| switch (cmd) { |
| case LEDST_OFF: |
| case LEDST_ON: |
| case LEDST_TOGGLE: |
| ret = led_set_state(dev, cmd); |
| break; |
| #ifdef CONFIG_LED_BLINK |
| case LEDST_BLINK: |
| ret = led_set_period(dev, freq_ms); |
| if (!ret) |
| ret = led_set_state(dev, LEDST_BLINK); |
| break; |
| #endif |
| case LEDST_COUNT: |
| printf("LED '%s': ", led_label); |
| ret = show_led_state(dev); |
| break; |
| #ifdef CONFIG_AML_LED_PWM |
| case LEDST_SET_BRIGHTNESS: |
| ret = led_set_brightness(dev, brightness); |
| break; |
| case LEDST_GET_BRIGHTNESS: |
| printf("LED '%s' brightness: %d\n",led_label,led_get_brightness(dev)); |
| break; |
| #endif |
| } |
| if (ret < 0) { |
| printf("LED '%s' operation failed (err=%d)\n", led_label, ret); |
| return CMD_RET_FAILURE; |
| } |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_LED_BLINK |
| #define BLINK "|blink [blink-freq in ms]" |
| #else |
| #define BLINK "" |
| #endif |
| |
| U_BOOT_CMD( |
| led, 4, 1, do_led, |
| "manage LEDs", |
| "<led_label> on|off|toggle" BLINK "\tChange LED state\n" |
| "led [<led_label>\tGet LED state\n" |
| #ifdef CONFIG_AML_LED_PWM |
| "led [<led_label> set_brightness\tSet LED brightness\n" |
| "led [<led_label> get_brightness\tGet LED brightness\n" |
| #endif |
| "led list\t\tshow a list of LEDs\n" |
| ); |