https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 188e1f81ba31af1b65a2f3611df4c670b092bbac authored by Linus Torvalds on 17 June 2007, 02:09:12 UTC
Linux 2.6.22-rc5
Linux 2.6.22-rc5
Tip revision: 188e1f8
leds.c
/*
* LED driver for Atmel AT91-based boards.
*
* Copyright (C) SAN People (Pty) Ltd
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <asm/mach-types.h>
#include <asm/leds.h>
#include <asm/arch/board.h>
#include <asm/arch/gpio.h>
static inline void at91_led_on(unsigned int led)
{
at91_set_gpio_value(led, 0);
}
static inline void at91_led_off(unsigned int led)
{
at91_set_gpio_value(led, 1);
}
static inline void at91_led_toggle(unsigned int led)
{
unsigned long is_off = at91_get_gpio_value(led);
if (is_off)
at91_led_on(led);
else
at91_led_off(led);
}
/*
* Handle LED events.
*/
static void at91_leds_event(led_event_t evt)
{
unsigned long flags;
local_irq_save(flags);
switch(evt) {
case led_start: /* System startup */
at91_led_on(at91_leds_cpu);
break;
case led_stop: /* System stop / suspend */
at91_led_off(at91_leds_cpu);
break;
#ifdef CONFIG_LEDS_TIMER
case led_timer: /* Every 50 timer ticks */
at91_led_toggle(at91_leds_timer);
break;
#endif
#ifdef CONFIG_LEDS_CPU
case led_idle_start: /* Entering idle state */
at91_led_off(at91_leds_cpu);
break;
case led_idle_end: /* Exit idle state */
at91_led_on(at91_leds_cpu);
break;
#endif
default:
break;
}
local_irq_restore(flags);
}
static int __init leds_init(void)
{
if (!at91_leds_timer || !at91_leds_cpu)
return -ENODEV;
leds_event = at91_leds_event;
leds_event(led_start);
return 0;
}
__initcall(leds_init);