leds.c

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/*
 * LED driver for Atmel AT91-based boards.
 *
 *  Copyright (C) SAN People (Pty) Ltd
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
*/

#include <linux/gpio.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/platform_device.h>

#include <mach/board.h>


/* ------------------------------------------------------------------------- */

#if defined(CONFIG_NEW_LEDS)

/*
 * New cross-platform LED support.
 */

static struct gpio_led_platform_data led_data;

static struct platform_device at91_gpio_leds_device = {
    .name           = "leds-gpio",
    .id         = -1,
    .dev.platform_data  = &led_data,
};

void __init at91_gpio_leds(struct gpio_led *leds, int nr)
{
    int i;

    if (!nr)
        return;

    for (i = 0; i < nr; i++)
        at91_set_gpio_output(leds[i].gpio, leds[i].active_low);

    led_data.leds = leds;
    led_data.num_leds = nr;
    platform_device_register(&at91_gpio_leds_device);
}

#else
void __init at91_gpio_leds(struct gpio_led *leds, int nr) {}
#endif


/* ------------------------------------------------------------------------- */

#if defined (CONFIG_LEDS_ATMEL_PWM)

/*
 * PWM Leds
 */

static struct gpio_led_platform_data pwm_led_data;

static struct platform_device at91_pwm_leds_device = {
    .name           = "leds-atmel-pwm",
    .id         = -1,
    .dev.platform_data  = &pwm_led_data,
};

void __init at91_pwm_leds(struct gpio_led *leds, int nr)
{
    int i;
    u32 pwm_mask = 0;

    if (!nr)
        return;

    for (i = 0; i < nr; i++)
        pwm_mask |= (1 << leds[i].gpio);

    pwm_led_data.leds = leds;
    pwm_led_data.num_leds = nr;

    at91_add_device_pwm(pwm_mask);
    platform_device_register(&at91_pwm_leds_device);
}
#else
void __init at91_pwm_leds(struct gpio_led *leds, int nr){}
#endif