mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-10 15:14:43 +00:00
9dfdcdfed4
Some GPIO connected LEDs have inverted polarity. Introduce new config option: CONFIG_GPIO_LED_INVERTED_TABLE for the specifying the inverted GPIO LEDs list and add support for this in the gpio_led driver. Signed-off-by: Igor Grinberg <grinberg@compulab.co.il> Tested-by: Ilya Ledvich <ilya@compulab.co.il>
53 lines
1.1 KiB
C
53 lines
1.1 KiB
C
/*
|
|
* 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));
|
|
}
|