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https://github.com/AsahiLinux/u-boot
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ffe2052d6e
When driver model is used for LEDs, provide a command to allow LED access. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Ziping Chen <techping.chan@gmail.com>
145 lines
2.7 KiB
C
145 lines
2.7 KiB
C
/*
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* Copyright (c) 2017 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <command.h>
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#include <dm.h>
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#include <led.h>
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#include <dm/uclass-internal.h>
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#define LED_TOGGLE LEDST_COUNT
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static const char *const state_label[] = {
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[LEDST_OFF] = "off",
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[LEDST_ON] = "on",
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[LEDST_TOGGLE] = "toggle",
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#ifdef CONFIG_LED_BLINK
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[LEDST_BLINK] = "blink",
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#endif
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};
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enum led_state_t get_led_cmd(char *var)
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{
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int i;
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for (i = 0; i < LEDST_COUNT; i++) {
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if (!strncmp(var, state_label[i], strlen(var)))
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return i;
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}
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return -1;
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}
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static int show_led_state(struct udevice *dev)
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{
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int ret;
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ret = led_get_state(dev);
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if (ret >= LEDST_COUNT)
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ret = -EINVAL;
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if (ret >= 0)
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printf("%s\n", state_label[ret]);
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return ret;
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}
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static int list_leds(void)
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{
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struct udevice *dev;
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int ret;
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for (uclass_find_first_device(UCLASS_LED, &dev);
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dev;
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uclass_find_next_device(&dev)) {
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struct led_uc_plat *plat = dev_get_uclass_platdata(dev);
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if (!plat->label)
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continue;
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printf("%-15s ", plat->label);
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if (device_active(dev)) {
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ret = show_led_state(dev);
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if (ret < 0)
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printf("Error %d\n", ret);
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} else {
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printf("<inactive>\n");
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}
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}
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return 0;
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}
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int do_led(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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enum led_state_t cmd;
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const char *led_label;
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struct udevice *dev;
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#ifdef CONFIG_LED_BLINK
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int freq_ms = 0;
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#endif
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int ret;
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/* Validate arguments */
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if (argc < 2)
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return CMD_RET_USAGE;
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led_label = argv[1];
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if (*led_label == 'l')
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return list_leds();
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cmd = argc > 2 ? get_led_cmd(argv[2]) : LEDST_COUNT;
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if (cmd < 0)
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return CMD_RET_USAGE;
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#ifdef CONFIG_LED_BLINK
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if (cmd == LEDST_BLINK) {
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if (argc < 4)
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return CMD_RET_USAGE;
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freq_ms = simple_strtoul(argv[3], NULL, 10);
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}
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#endif
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ret = led_get_by_label(led_label, &dev);
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if (ret) {
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printf("LED '%s' not found (err=%d)\n", led_label, ret);
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return CMD_RET_FAILURE;
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}
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switch (cmd) {
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case LEDST_OFF:
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case LEDST_ON:
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case LEDST_TOGGLE:
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ret = led_set_state(dev, cmd);
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break;
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#ifdef CONFIG_LED_BLINK
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case LEDST_BLINK:
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ret = led_set_period(dev, freq_ms);
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if (!ret)
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ret = led_set_state(dev, LEDST_BLINK);
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break;
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#endif
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case LEDST_COUNT:
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printf("LED '%s': ", led_label);
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ret = show_led_state(dev);
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break;
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}
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if (ret < 0) {
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printf("LED '%s' operation failed (err=%d)\n", led_label, ret);
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return CMD_RET_FAILURE;
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}
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return 0;
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}
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#ifdef CONFIG_LED_BLINK
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#define BLINK "|blink [blink-freq in ms]"
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#else
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#define BLINK ""
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#endif
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U_BOOT_CMD(
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led, 4, 1, do_led,
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"manage LEDs",
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"<led_label> on|off|toggle" BLINK "\tChange LED state\n"
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"led [<led_label>\tGet LED state\n"
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"led list\t\tshow a list of LEDs"
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);
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