88 lines
2.0 KiB
C
88 lines
2.0 KiB
C
/*
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* LED command support for barebox
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*
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* (C) Copyright 2010 Sascha Hauer, Pengutronix
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <common.h>
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#include <led.h>
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#include <command.h>
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#include <getopt.h>
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#include <errno.h>
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static int do_led(int argc, char *argv[])
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{
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unsigned long value;
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struct led *led;
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int ret;
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if (argc == 1) {
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int i = 0;
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led = led_by_number(i);
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if (!led) {
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printf("no registered LEDs\n");
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return COMMAND_ERROR;
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}
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printf("registered LEDs:\n");
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while ((led = led_by_number(i))) {
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printf("%-2d: name: %-10s max_value: %d\n",
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i, led->name ? led->name : "none",
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led->max_value);
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i++;
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}
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return 0;
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}
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if (argc != 3)
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return COMMAND_ERROR_USAGE;
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led = led_by_name_or_number(argv[1]);
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if (!led) {
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printf("no such LED: %s\n", argv[1]);
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return 1;
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}
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value = simple_strtoul(argv[optind + 1], NULL, 0);
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ret = led_set(led, value);
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if (ret < 0) {
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perror("led");
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return 1;
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}
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return 0;
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}
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BAREBOX_CMD_HELP_START(led)
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BAREBOX_CMD_HELP_TEXT("Control the value of a LED. The exact meaning of VALUE is unspecified,")
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BAREBOX_CMD_HELP_TEXT("it can be a brightness, or a color. Most often a value of '1' means on")
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BAREBOX_CMD_HELP_TEXT("and '0' means off.")
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BAREBOX_CMD_HELP_TEXT("")
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BAREBOX_CMD_HELP_TEXT("Without arguments the available LEDs are listed.")
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BAREBOX_CMD_HELP_END
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BAREBOX_CMD_START(led)
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.cmd = do_led,
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BAREBOX_CMD_DESC("control LEDs")
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BAREBOX_CMD_OPTS("LED VALUE")
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BAREBOX_CMD_GROUP(CMD_GRP_HWMANIP)
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BAREBOX_CMD_HELP(cmd_led_help)
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BAREBOX_CMD_END
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