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ARM: mach-ebsa110: retire custom LED code 

Signed-off-by: Bryan Wu <bryan.wu@canonical.com>
This commit is contained in:
Bryan Wu 2011-06-30 22:56:17 +08:00
parent 8ee8ef2996
commit 3dd6b990d1
2 changed files with 53 additions and 36 deletions
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4
arch/arm/mach-ebsa110/Makefile
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@ -4,9 +4,7 @@
# Object file lists.
obj-y := core.o io.o
obj-y := core.o io.o leds.o
obj-m :=
obj-n :=
obj- :=
obj-$(CONFIG_LEDS) += leds.o

85
arch/arm/mach-ebsa110/leds.c
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@ -1,52 +1,71 @@
/*
* linux/arch/arm/mach-ebsa110/leds.c
* Driver for the LED found on the EBSA110 machine
* Based on Versatile and RealView machine LED code
*
* Copyright (C) 1998 Russell King
*
* 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.
*
* EBSA-110 LED control routines. We use the led as follows:
*
* - Red - toggles state every 50 timer interrupts
* License terms: GNU General Public License (GPL) version 2
* Author: Bryan Wu <bryan.wu@canonical.com>
*/
#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/leds.h>
#include <mach/hardware.h>
#include <asm/leds.h>
#include <asm/mach-types.h>
#include "core.h"
static spinlock_t leds_lock;
static void ebsa110_leds_event(led_event_t ledevt)
#if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS)
static void ebsa110_led_set(struct led_classdev *cdev,
enum led_brightness b)
{
unsigned long flags;
u8 reg = __raw_readb(SOFT_BASE);
spin_lock_irqsave(&leds_lock, flags);
if (b != LED_OFF)
reg |= 0x80;
else
reg &= ~0x80;
switch(ledevt) {
case led_timer:
*(volatile unsigned char *)SOFT_BASE ^= 128;
break;
default:
break;
}
spin_unlock_irqrestore(&leds_lock, flags);
__raw_writeb(reg, SOFT_BASE);
}
static int __init leds_init(void)
static enum led_brightness ebsa110_led_get(struct led_classdev *cdev)
{
if (machine_is_ebsa110())
leds_event = ebsa110_leds_event;
u8 reg = __raw_readb(SOFT_BASE);
return (reg & 0x80) ? LED_FULL : LED_OFF;
}
static int __init ebsa110_leds_init(void)
{
struct led_classdev *cdev;
int ret;
if (!machine_is_ebsa110())
return -ENODEV;
cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
if (!cdev)
return -ENOMEM;
cdev->name = "ebsa110:0";
cdev->brightness_set = ebsa110_led_set;
cdev->brightness_get = ebsa110_led_get;
cdev->default_trigger = "heartbeat";
ret = led_classdev_register(NULL, cdev);
if (ret < 0) {
kfree(cdev);
return ret;
}
return 0;
}
__initcall(leds_init);
/*
* Since we may have triggers on any subsystem, defer registration
* until after subsystem_init.
*/
fs_initcall(ebsa110_leds_init);
#endif