target/linux/at91-2.6/patches-2.6.22/002-led-driver.patch

   1 diff -urN linux-2.6.22.1.old/arch/arm/mach-at91/Makefile linux-2.6.22.1/arch/arm/mach-at91/Makefile
   2 --- linux-2.6.22.1.old/arch/arm/mach-at91/Makefile      2007-07-29 06:46:13.000000000 +0200
   3 +++ linux-2.6.22.1/arch/arm/mach-at91/Makefile  2007-07-29 06:54:19.000000000 +0200
   4 @@ -53,7 +53,7 @@
   5  led-$(CONFIG_MACH_CSB637)      += leds.o
   6  led-$(CONFIG_MACH_KB9200)      += leds.o
   7  led-$(CONFIG_MACH_KAFA)                += leds.o
   8 -led-$(CONFIG_MACH_VLINK)       += leds.o
   9 +led-$(CONFIG_MACH_VLINK)       += vlink_leds.o
  10  obj-$(CONFIG_LEDS) += $(led-y)
  11
  12  # VGA support
  13 diff -urN linux-2.6.22.1.old/arch/arm/mach-at91/vlink_leds.c linux-2.6.22.1/arch/arm/mach-at91/vlink_leds.c
  14 --- linux-2.6.22.1.old/arch/arm/mach-at91/vlink_leds.c  1970-01-01 01:00:00.000000000 +0100
  15 +++ linux-2.6.22.1/arch/arm/mach-at91/vlink_leds.c      2007-07-29 06:54:58.000000000 +0200
  16 @@ -0,0 +1,105 @@
  17 +/*
  18 + * LED driver for Atmel AT91-based boards.
  19 + *
  20 + *  Copyright (C) SAN People (Pty) Ltd
  21 + *     Modified for FDL VersaLink Copyright (C) Guthrie Consulting
  22 + *
  23 + * This program is free software; you can redistribute it and/or
  24 + * modify it under the terms of the GNU General Public License
  25 + * as published by the Free Software Foundation; either version
  26 + * 2 of the License, or (at your option) any later version.
  27 +*/
  28 +
  29 +#include <linux/kernel.h>
  30 +#include <linux/module.h>
  31 +#include <linux/init.h>
  32 +
  33 +#include <asm/mach-types.h>
  34 +#include <asm/leds.h>
  35 +#include <asm/arch/board.h>
  36 +#include <asm/arch/gpio.h>
  37 +
  38 +
  39 +static inline void at91_led_on(unsigned int led)
  40 +{
  41 +       at91_set_gpio_value(led, 0);
  42 +}
  43 +
  44 +static inline void at91_led_off(unsigned int led)
  45 +{
  46 +       at91_set_gpio_value(led, 1);
  47 +}
  48 +
  49 +static inline void at91_led_toggle(unsigned int led)
  50 +{
  51 +       unsigned long is_off = at91_get_gpio_value(led);
  52 +       if (is_off) {
  53 +               at91_led_on(led);
  54 +               at91_led_off(at91_leds_cpu);
  55 +               }
  56 +       else {
  57 +               at91_led_on(at91_leds_cpu);
  58 +               at91_led_off(led);
  59 +               }
  60 +}
  61 +
  62 +
  63 +/*
  64 + * Handle LED events.
  65 + */
  66 +
  67 +/*
  68 + * VersaLink has a single bi-coloured LED which changes colour when the
  69 + * polarity is reversed
  70 + */
  71 +static void at91_leds_event(led_event_t evt)
  72 +{
  73 +       unsigned long flags;
  74 +
  75 +       local_irq_save(flags);
  76 +
  77 +       switch(evt) {
  78 +       case led_start:         /* System startup */
  79 +               at91_led_toggle(at91_leds_timer);
  80 +               break;
  81 +
  82 +       case led_stop:          /* System stop / suspend */
  83 +               at91_led_toggle(at91_leds_timer);
  84 +               break;
  85 +
  86 +#ifdef CONFIG_LEDS_TIMER
  87 +       case led_timer:         /* Every 50 timer ticks */
  88 +               at91_led_toggle(at91_leds_timer);
  89 +               break;
  90 +#endif
  91 +
  92 +#ifdef CONFIG_LEDS_CPU
  93 +       case led_idle_start:    /* Entering idle state */
  94 +               at91_led_toggle(at91_leds_timer);
  95 +               break;
  96 +
  97 +       case led_idle_end:      /* Exit idle state */
  98 +               at91_led_toggle(at91_leds_timer);
  99 +               break;
 100 +#endif
 101 +
 102 +       default:
 103 +               break;
 104 +       }
 105 +
 106 +       local_irq_restore(flags);
 107 +}
 108 +
 109 +
 110 +static int __init leds_init(void)
 111 +{
 112 +       if (!at91_leds_timer || !at91_leds_cpu)
 113 +               return -ENODEV;
 114 +
 115 +       leds_event = at91_leds_event;
 116 +
 117 +       leds_event(led_start);
 118 +       return 0;
 119 +}
 120 +
 121 +__initcall(leds_init);