target/linux/at91/patches-2.6.22/002-led-driver.patch

   1 Index: linux-2.6.22.19/arch/arm/mach-at91/Makefile
   2 ===================================================================
   3 --- linux-2.6.22.19.orig/arch/arm/mach-at91/Makefile
   4 +++ linux-2.6.22.19/arch/arm/mach-at91/Makefile
   5 @@ -53,7 +53,7 @@ led-$(CONFIG_MACH_CSB337)     += leds.o
   6  led-$(CONFIG_MACH_CSB637)      += leds.o
   7  led-$(CONFIG_MACH_KB9200)      += leds.o
   8  led-$(CONFIG_MACH_KAFA)                += leds.o
   9 -led-$(CONFIG_MACH_VLINK)       += leds.o
  10 +led-$(CONFIG_MACH_VLINK)       += vlink_leds.o
  11  obj-$(CONFIG_LEDS) += $(led-y)
  12
  13  # VGA support
  14 Index: linux-2.6.22.19/arch/arm/mach-at91/vlink_leds.c
  15 ===================================================================
  16 --- /dev/null
  17 +++ linux-2.6.22.19/arch/arm/mach-at91/vlink_leds.c
  18 @@ -0,0 +1,105 @@
  19 +/*
  20 + * LED driver for Atmel AT91-based boards.
  21 + *
  22 + *  Copyright (C) SAN People (Pty) Ltd
  23 + *     Modified for FDL VersaLink Copyright (C) Guthrie Consulting
  24 + *
  25 + * This program is free software; you can redistribute it and/or
  26 + * modify it under the terms of the GNU General Public License
  27 + * as published by the Free Software Foundation; either version
  28 + * 2 of the License, or (at your option) any later version.
  29 +*/
  30 +
  31 +#include <linux/kernel.h>
  32 +#include <linux/module.h>
  33 +#include <linux/init.h>
  34 +
  35 +#include <asm/mach-types.h>
  36 +#include <asm/leds.h>
  37 +#include <asm/arch/board.h>
  38 +#include <asm/arch/gpio.h>
  39 +
  40 +
  41 +static inline void at91_led_on(unsigned int led)
  42 +{
  43 +       at91_set_gpio_value(led, 0);
  44 +}
  45 +
  46 +static inline void at91_led_off(unsigned int led)
  47 +{
  48 +       at91_set_gpio_value(led, 1);
  49 +}
  50 +
  51 +static inline void at91_led_toggle(unsigned int led)
  52 +{
  53 +       unsigned long is_off = at91_get_gpio_value(led);
  54 +       if (is_off) {
  55 +               at91_led_on(led);
  56 +               at91_led_off(at91_leds_cpu);
  57 +               }
  58 +       else {
  59 +               at91_led_on(at91_leds_cpu);
  60 +               at91_led_off(led);
  61 +               }
  62 +}
  63 +
  64 +
  65 +/*
  66 + * Handle LED events.
  67 + */
  68 +
  69 +/*
  70 + * VersaLink has a single bi-coloured LED which changes colour when the
  71 + * polarity is reversed
  72 + */
  73 +static void at91_leds_event(led_event_t evt)
  74 +{
  75 +       unsigned long flags;
  76 +
  77 +       local_irq_save(flags);
  78 +
  79 +       switch(evt) {
  80 +       case led_start:         /* System startup */
  81 +               at91_led_toggle(at91_leds_timer);
  82 +               break;
  83 +
  84 +       case led_stop:          /* System stop / suspend */
  85 +               at91_led_toggle(at91_leds_timer);
  86 +               break;
  87 +
  88 +#ifdef CONFIG_LEDS_TIMER
  89 +       case led_timer:         /* Every 50 timer ticks */
  90 +               at91_led_toggle(at91_leds_timer);
  91 +               break;
  92 +#endif
  93 +
  94 +#ifdef CONFIG_LEDS_CPU
  95 +       case led_idle_start:    /* Entering idle state */
  96 +               at91_led_toggle(at91_leds_timer);
  97 +               break;
  98 +
  99 +       case led_idle_end:      /* Exit idle state */
 100 +               at91_led_toggle(at91_leds_timer);
 101 +               break;
 102 +#endif
 103 +
 104 +       default:
 105 +               break;
 106 +       }
 107 +
 108 +       local_irq_restore(flags);
 109 +}
 110 +
 111 +
 112 +static int __init leds_init(void)
 113 +{
 114 +       if (!at91_leds_timer || !at91_leds_cpu)
 115 +               return -ENODEV;
 116 +
 117 +       leds_event = at91_leds_event;
 118 +
 119 +       leds_event(led_start);
 120 +       return 0;
 121 +}
 122 +
 123 +__initcall(leds_init);