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: 0ee5623f9a6e52df90a78bd21179f8ab370e102e authored by Linus Torvalds on 04 May 2011, 02:59:13 UTC
Linux 2.6.39-rc6
Linux 2.6.39-rc6
Tip revision: 0ee5623
leds-lart.c
/*
* linux/arch/arm/mach-sa1100/leds-lart.c
*
* (C) Erik Mouw (J.A.K.Mouw@its.tudelft.nl), April 21, 2000
*
* LART uses the LED as follows:
* - GPIO23 is the LED, on if system is not idle
* You can use both CONFIG_LEDS_CPU and CONFIG_LEDS_TIMER at the same
* time, but in that case the timer events will still dictate the
* pace of the LED.
*/
#include <linux/init.h>
#include <mach/hardware.h>
#include <asm/leds.h>
#include <asm/system.h>
#include "leds.h"
#define LED_STATE_ENABLED 1
#define LED_STATE_CLAIMED 2
static unsigned int led_state;
static unsigned int hw_led_state;
#define LED_23 GPIO_GPIO23
#define LED_MASK (LED_23)
void lart_leds_event(led_event_t evt)
{
unsigned long flags;
local_irq_save(flags);
switch(evt) {
case led_start:
/* pin 23 is output pin */
GPDR |= LED_23;
hw_led_state = LED_MASK;
led_state = LED_STATE_ENABLED;
break;
case led_stop:
led_state &= ~LED_STATE_ENABLED;
break;
case led_claim:
led_state |= LED_STATE_CLAIMED;
hw_led_state = LED_MASK;
break;
case led_release:
led_state &= ~LED_STATE_CLAIMED;
hw_led_state = LED_MASK;
break;
#ifdef CONFIG_LEDS_TIMER
case led_timer:
if (!(led_state & LED_STATE_CLAIMED))
hw_led_state ^= LED_23;
break;
#endif
#ifdef CONFIG_LEDS_CPU
case led_idle_start:
/* The LART people like the LED to be off when the
system is idle... */
if (!(led_state & LED_STATE_CLAIMED))
hw_led_state &= ~LED_23;
break;
case led_idle_end:
/* ... and on if the system is not idle */
if (!(led_state & LED_STATE_CLAIMED))
hw_led_state |= LED_23;
break;
#endif
case led_red_on:
if (led_state & LED_STATE_CLAIMED)
hw_led_state &= ~LED_23;
break;
case led_red_off:
if (led_state & LED_STATE_CLAIMED)
hw_led_state |= LED_23;
break;
default:
break;
}
/* Now set the GPIO state, or nothing will happen at all */
if (led_state & LED_STATE_ENABLED) {
GPSR = hw_led_state;
GPCR = hw_led_state ^ LED_MASK;
}
local_irq_restore(flags);
}