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a8eeaf2f7a
This patch extends the U-Boot "led" command to support automatic blinking by setting a blink frequency in milliseconds. Additionally the number of supported LEDs is increased to 6 (0...5). This will be used by the PCA9551 LED driver. Signed-off-by: Stefan Roese <sr@denx.de> Reviewed-by: Tom Rini <trini@konsulko.com>
187 lines
3.9 KiB
C
187 lines
3.9 KiB
C
/*
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* (C) Copyright 2010
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* Jason Kridner <jkridner@beagleboard.org>
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*
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* Based on cmd_led.c patch from:
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* http://www.mail-archive.com/u-boot@lists.denx.de/msg06873.html
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* (C) Copyright 2008
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* Ulf Samuelsson <ulf.samuelsson@atmel.com>
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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 <config.h>
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#include <command.h>
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#include <status_led.h>
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struct led_tbl_s {
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char *string; /* String for use in the command */
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led_id_t mask; /* Mask used for calling __led_set() */
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void (*off)(void); /* Optional function for turning LED off */
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void (*on)(void); /* Optional function for turning LED on */
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void (*toggle)(void);/* Optional function for toggling LED */
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};
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typedef struct led_tbl_s led_tbl_t;
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static const led_tbl_t led_commands[] = {
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#ifdef CONFIG_BOARD_SPECIFIC_LED
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#ifdef STATUS_LED_BIT
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{ "0", STATUS_LED_BIT, NULL, NULL, NULL },
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#endif
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#ifdef STATUS_LED_BIT1
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{ "1", STATUS_LED_BIT1, NULL, NULL, NULL },
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#endif
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#ifdef STATUS_LED_BIT2
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{ "2", STATUS_LED_BIT2, NULL, NULL, NULL },
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#endif
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#ifdef STATUS_LED_BIT3
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{ "3", STATUS_LED_BIT3, NULL, NULL, NULL },
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#endif
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#ifdef STATUS_LED_BIT4
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{ "4", STATUS_LED_BIT4, NULL, NULL, NULL },
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#endif
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#ifdef STATUS_LED_BIT5
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{ "5", STATUS_LED_BIT5, NULL, NULL, NULL },
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#endif
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#endif
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#ifdef STATUS_LED_GREEN
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{ "green", STATUS_LED_GREEN, green_led_off, green_led_on, NULL },
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#endif
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#ifdef STATUS_LED_YELLOW
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{ "yellow", STATUS_LED_YELLOW, yellow_led_off, yellow_led_on, NULL },
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#endif
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#ifdef STATUS_LED_RED
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{ "red", STATUS_LED_RED, red_led_off, red_led_on, NULL },
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#endif
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#ifdef STATUS_LED_BLUE
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{ "blue", STATUS_LED_BLUE, blue_led_off, blue_led_on, NULL },
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#endif
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{ NULL, 0, NULL, NULL, NULL }
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};
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enum led_cmd { LED_ON, LED_OFF, LED_TOGGLE, LED_BLINK };
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enum led_cmd get_led_cmd(char *var)
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{
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if (strcmp(var, "off") == 0)
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return LED_OFF;
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if (strcmp(var, "on") == 0)
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return LED_ON;
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if (strcmp(var, "toggle") == 0)
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return LED_TOGGLE;
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if (strcmp(var, "blink") == 0)
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return LED_BLINK;
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return -1;
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}
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/*
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* LED drivers providing a blinking LED functionality, like the
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* PCA9551, can override this empty weak function
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*/
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void __weak __led_blink(led_id_t mask, int freq)
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{
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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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int i, match = 0;
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enum led_cmd cmd;
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int freq;
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/* Validate arguments */
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if ((argc < 3) || (argc > 4))
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return CMD_RET_USAGE;
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cmd = get_led_cmd(argv[2]);
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if (cmd < 0) {
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return CMD_RET_USAGE;
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}
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for (i = 0; led_commands[i].string; i++) {
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if ((strcmp("all", argv[1]) == 0) ||
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(strcmp(led_commands[i].string, argv[1]) == 0)) {
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match = 1;
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switch (cmd) {
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case LED_ON:
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if (led_commands[i].on)
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led_commands[i].on();
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else
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__led_set(led_commands[i].mask,
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STATUS_LED_ON);
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break;
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case LED_OFF:
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if (led_commands[i].off)
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led_commands[i].off();
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else
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__led_set(led_commands[i].mask,
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STATUS_LED_OFF);
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break;
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case LED_TOGGLE:
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if (led_commands[i].toggle)
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led_commands[i].toggle();
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else
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__led_toggle(led_commands[i].mask);
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break;
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case LED_BLINK:
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if (argc != 4)
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return CMD_RET_USAGE;
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freq = simple_strtoul(argv[3], NULL, 10);
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__led_blink(led_commands[i].mask, freq);
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}
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/* Need to set only 1 led if led_name wasn't 'all' */
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if (strcmp("all", argv[1]) != 0)
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break;
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}
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}
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/* If we ran out of matches, print Usage */
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if (!match) {
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return CMD_RET_USAGE;
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}
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return 0;
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}
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U_BOOT_CMD(
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led, 4, 1, do_led,
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"["
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#ifdef CONFIG_BOARD_SPECIFIC_LED
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#ifdef STATUS_LED_BIT
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"0|"
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#endif
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#ifdef STATUS_LED_BIT1
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"1|"
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#endif
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#ifdef STATUS_LED_BIT2
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"2|"
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#endif
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#ifdef STATUS_LED_BIT3
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"3|"
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#endif
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#ifdef STATUS_LED_BIT4
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"4|"
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#endif
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#ifdef STATUS_LED_BIT5
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"5|"
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#endif
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#endif
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#ifdef STATUS_LED_GREEN
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"green|"
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#endif
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#ifdef STATUS_LED_YELLOW
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"yellow|"
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#endif
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#ifdef STATUS_LED_RED
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"red|"
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#endif
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#ifdef STATUS_LED_BLUE
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"blue|"
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#endif
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"all] [on|off|toggle|blink] [blink-freq in ms]",
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"[led_name] [on|off|toggle|blink] sets or clears led(s)"
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);
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