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For boards that support LEDs driven via GPIO (CONFIG_GPIO_LED), it may be useful to have some generic stubs (wrapper functions) for the "colored" LEDs. This allows defining STATUS_LED_* values directly to GPIO numbers, e.g.: #define STATUS_LED_GREEN 248 /* = PH24 */ To keep those optional, it's probably best to introduce an additional configuration setting. I've chosen CONFIG_GPIO_LED_STUBS for that. Placing the code in drivers/misc/gpio_led.c also ensures that it automatically depends on CONFIG_GPIO_LED too. Signed-off-by: Bernhard Nortmann <bernhard.nortmann@web.de> Reviewed-by: Simon Glass <sjg@chromium.org>
108 lines
1.9 KiB
C
108 lines
1.9 KiB
C
/*
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* Status LED driver based on GPIO access conventions of Linux
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*
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* Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw>
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* Licensed under the GPL-2 or later.
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*/
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#include <common.h>
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#include <status_led.h>
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#include <asm/gpio.h>
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#ifndef CONFIG_GPIO_LED_INVERTED_TABLE
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#define CONFIG_GPIO_LED_INVERTED_TABLE {}
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#endif
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static led_id_t gpio_led_inv[] = CONFIG_GPIO_LED_INVERTED_TABLE;
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static int gpio_led_gpio_value(led_id_t mask, int state)
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{
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int i, gpio_value = (state == STATUS_LED_ON);
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for (i = 0; i < ARRAY_SIZE(gpio_led_inv); i++) {
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if (gpio_led_inv[i] == mask)
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gpio_value = !gpio_value;
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}
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return gpio_value;
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}
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void __led_init(led_id_t mask, int state)
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{
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int gpio_value;
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if (gpio_request(mask, "gpio_led") != 0) {
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printf("%s: failed requesting GPIO%lu!\n", __func__, mask);
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return;
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}
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gpio_value = gpio_led_gpio_value(mask, state);
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gpio_direction_output(mask, gpio_value);
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}
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void __led_set(led_id_t mask, int state)
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{
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int gpio_value = gpio_led_gpio_value(mask, state);
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gpio_set_value(mask, gpio_value);
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}
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void __led_toggle(led_id_t mask)
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{
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gpio_set_value(mask, !gpio_get_value(mask));
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}
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#ifdef CONFIG_GPIO_LED_STUBS
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/* 'generic' override of colored LED stubs, to use GPIO functions instead */
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#ifdef STATUS_LED_RED
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void red_led_on(void)
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{
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__led_set(STATUS_LED_RED, STATUS_LED_ON);
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}
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void red_led_off(void)
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{
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__led_set(STATUS_LED_RED, STATUS_LED_OFF);
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}
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#endif
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#ifdef STATUS_LED_GREEN
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void green_led_on(void)
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{
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__led_set(STATUS_LED_GREEN, STATUS_LED_ON);
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}
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void green_led_off(void)
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{
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__led_set(STATUS_LED_GREEN, STATUS_LED_OFF);
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}
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#endif
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#ifdef STATUS_LED_YELLOW
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void yellow_led_on(void)
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{
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__led_set(STATUS_LED_YELLOW, STATUS_LED_ON);
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}
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void yellow_led_off(void)
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{
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__led_set(STATUS_LED_YELLOW, STATUS_LED_OFF);
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}
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#endif
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#ifdef STATUS_LED_BLUE
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void blue_led_on(void)
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{
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__led_set(STATUS_LED_BLUE, STATUS_LED_ON);
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}
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void blue_led_off(void)
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{
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__led_set(STATUS_LED_BLUE, STATUS_LED_OFF);
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}
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#endif
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#endif /* CONFIG_GPIO_LED_STUBS */
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