LXR linux/arch/arm/mach-at91/leds.c

   1/*
   2 * LED driver for Atmel AT91-based boards.
   3 *
   4 *  Copyright (C) SAN People (Pty) Ltd
   5 *
   6 * This program is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU General Public License
   8 * as published by the Free Software Foundation; either version
   9 * 2 of the License, or (at your option) any later version.
  10*/
  11
  12#include <linux/gpio.h>
  13#include <linux/kernel.h>
  14#include <linux/module.h>
  15#include <linux/init.h>
  16#include <linux/platform_device.h>
  17
  18#include "board.h"
  19
  20
  21/* ------------------------------------------------------------------------- */
  22
  23#if defined(CONFIG_NEW_LEDS)
  24
  25/*
  26 * New cross-platform LED support.
  27 */
  28
  29static struct gpio_led_platform_data led_data;
  30
  31static struct platform_device at91_gpio_leds_device = {
  32        .name                   = "leds-gpio",
  33        .id                     = -1,
  34        .dev.platform_data      = &led_data,
  35};
  36
  37void __init at91_gpio_leds(struct gpio_led *leds, int nr)
  38{
  39        int i;
  40
  41        if (!nr)
  42                return;
  43
  44        for (i = 0; i < nr; i++)
  45                at91_set_gpio_output(leds[i].gpio, leds[i].active_low);
  46
  47        led_data.leds = leds;
  48        led_data.num_leds = nr;
  49        platform_device_register(&at91_gpio_leds_device);
  50}
  51
  52#else
  53void __init at91_gpio_leds(struct gpio_led *leds, int nr) {}
  54#endif
  55
  56
  57/* ------------------------------------------------------------------------- */
  58
  59#if defined (CONFIG_LEDS_ATMEL_PWM)
  60
  61/*
  62 * PWM Leds
  63 */
  64
  65static struct gpio_led_platform_data pwm_led_data;
  66
  67static struct platform_device at91_pwm_leds_device = {
  68        .name                   = "leds-atmel-pwm",
  69        .id                     = -1,
  70        .dev.platform_data      = &pwm_led_data,
  71};
  72
  73void __init at91_pwm_leds(struct gpio_led *leds, int nr)
  74{
  75        int i;
  76        u32 pwm_mask = 0;
  77
  78        if (!nr)
  79                return;
  80
  81        for (i = 0; i < nr; i++)
  82                pwm_mask |= (1 << leds[i].gpio);
  83
  84        pwm_led_data.leds = leds;
  85        pwm_led_data.num_leds = nr;
  86
  87        at91_add_device_pwm(pwm_mask);
  88        platform_device_register(&at91_pwm_leds_device);
  89}
  90#else
  91void __init at91_pwm_leds(struct gpio_led *leds, int nr){}
  92#endif
  93