| /* |
| * Status LED driver based on GPIO access conventions of Linux |
| * |
| * Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw> |
| * Licensed under the GPL-2 or later. |
| */ |
| |
| #include <common.h> |
| #include <status_led.h> |
| #include <asm/gpio.h> |
| |
| #ifndef CONFIG_GPIO_LED_INVERTED_TABLE |
| #define CONFIG_GPIO_LED_INVERTED_TABLE {} |
| #endif |
| |
| static led_id_t gpio_led_inv[] = CONFIG_GPIO_LED_INVERTED_TABLE; |
| |
| static int gpio_led_gpio_value(led_id_t mask, int state) |
| { |
| int i, gpio_value = (state == STATUS_LED_ON); |
| |
| for (i = 0; i < ARRAY_SIZE(gpio_led_inv); i++) { |
| if (gpio_led_inv[i] == mask) |
| gpio_value = !gpio_value; |
| } |
| |
| return gpio_value; |
| } |
| |
| void __led_init(led_id_t mask, int state) |
| { |
| int gpio_value; |
| |
| if (gpio_request(mask, "gpio_led") != 0) { |
| printf("%s: failed requesting GPIO%lu!\n", __func__, mask); |
| return; |
| } |
| |
| gpio_value = gpio_led_gpio_value(mask, state); |
| gpio_direction_output(mask, gpio_value); |
| } |
| |
| void __led_set(led_id_t mask, int state) |
| { |
| int gpio_value = gpio_led_gpio_value(mask, state); |
| |
| gpio_set_value(mask, gpio_value); |
| } |
| |
| void __led_toggle(led_id_t mask) |
| { |
| gpio_set_value(mask, !gpio_get_value(mask)); |
| } |