94 lines
1.6 KiB
C
94 lines
1.6 KiB
C
/*
|
|
* LED driver for KS8695-based boards.
|
|
*
|
|
* Copyright (C) Andrew Victor
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
|
|
#include <asm/leds.h>
|
|
#include <mach/devices.h>
|
|
#include <mach/gpio.h>
|
|
|
|
|
|
static inline void ks8695_led_on(unsigned int led)
|
|
{
|
|
gpio_set_value(led, 0);
|
|
}
|
|
|
|
static inline void ks8695_led_off(unsigned int led)
|
|
{
|
|
gpio_set_value(led, 1);
|
|
}
|
|
|
|
static inline void ks8695_led_toggle(unsigned int led)
|
|
{
|
|
unsigned long is_off = gpio_get_value(led);
|
|
if (is_off)
|
|
ks8695_led_on(led);
|
|
else
|
|
ks8695_led_off(led);
|
|
}
|
|
|
|
|
|
/*
|
|
* Handle LED events.
|
|
*/
|
|
static void ks8695_leds_event(led_event_t evt)
|
|
{
|
|
unsigned long flags;
|
|
|
|
local_irq_save(flags);
|
|
|
|
switch(evt) {
|
|
case led_start: /* System startup */
|
|
ks8695_led_on(ks8695_leds_cpu);
|
|
break;
|
|
|
|
case led_stop: /* System stop / suspend */
|
|
ks8695_led_off(ks8695_leds_cpu);
|
|
break;
|
|
|
|
#ifdef CONFIG_LEDS_TIMER
|
|
case led_timer: /* Every 50 timer ticks */
|
|
ks8695_led_toggle(ks8695_leds_timer);
|
|
break;
|
|
#endif
|
|
|
|
#ifdef CONFIG_LEDS_CPU
|
|
case led_idle_start: /* Entering idle state */
|
|
ks8695_led_off(ks8695_leds_cpu);
|
|
break;
|
|
|
|
case led_idle_end: /* Exit idle state */
|
|
ks8695_led_on(ks8695_leds_cpu);
|
|
break;
|
|
#endif
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
|
|
static int __init leds_init(void)
|
|
{
|
|
if ((ks8695_leds_timer == -1) || (ks8695_leds_cpu == -1))
|
|
return -ENODEV;
|
|
|
|
leds_event = ks8695_leds_event;
|
|
|
|
leds_event(led_start);
|
|
return 0;
|
|
}
|
|
|
|
__initcall(leds_init);
|