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
  29 static struct gpio_led_platform_data led_data;
  30
  31 static struct platform_device at91_gpio_leds_device = {
  32         .name                   = "leds-gpio",
  33         .id                     = -1,
  34         .dev.platform_data      = &led_data,
  35 };
  36
  37 void __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
  53 void __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
  65 static struct gpio_led_platform_data pwm_led_data;
  66
  67 static struct platform_device at91_pwm_leds_device = {
  68         .name                   = "leds-atmel-pwm",
  69         .id                     = -1,
  70         .dev.platform_data      = &pwm_led_data,
  71 };
  72
  73 void __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
  91 void __init at91_pwm_leds(struct gpio_led *leds, int nr){}
  92 #endif