linux-imx

/*

 * LEDs driver for GPIOs

 *

 * Copyright (C) 2007 8D Technologies inc.

 * Raphael Assenat <raph@8d.com>

 * Copyright (C) 2008 Freescale Semiconductor, Inc.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 *

 */

#include <linux/err.h>

#include <linux/gpio.h>

#include <linux/gpio/consumer.h>

#include <linux/kernel.h>

#include <linux/leds.h>

#include <linux/module.h>

#include <linux/of.h>

#include <linux/platform_device.h>

#include <linux/property.h>

#include <linux/slab.h>

​

struct gpio_led_data {

    struct led_classdev cdev;

    struct gpio_desc *gpiod;

    u8 can_sleep;

    u8 blinking;

    gpio_blink_set_t platform_gpio_blink_set;

};

​

static inline struct gpio_led_data *

            cdev_to_gpio_led_data(struct led_classdev *led_cdev)

{

    return container_of(led_cdev, struct gpio_led_data, cdev);

}

​

static void gpio_led_set(struct led_classdev *led_cdev,

    enum led_brightness value)

{

    struct gpio_led_data *led_dat = cdev_to_gpio_led_data(led_cdev);

    int level;

​

    if (value == LED_OFF)

        level = 0;

    else

        level = 1;

​

    if (led_dat->blinking) {

        led_dat->platform_gpio_blink_set(led_dat->gpiod, level,

                         NULL, NULL);

        led_dat->blinking = 0;

    } else {

        if (led_dat->can_sleep)

            gpiod_set_value_cansleep(led_dat->gpiod, level);

        else

            gpiod_set_value(led_dat->gpiod, level);

    }

}

​

static int gpio_led_set_blocking(struct led_classdev *led_cdev,

    enum led_brightness value)

{