[deliverable/linux.git] / arch / arm / mach-ebsa110 / leds.c

/*
 * Driver for the LED found on the EBSA110 machine
 * Based on Versatile and RealView machine LED code
 *
 * License terms: GNU General Public License (GPL) version 2
 * Author: Bryan Wu <bryan.wu@canonical.com>
 */
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/leds.h>

#include <asm/mach-types.h>

#include "core.h"

#if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS)
static void ebsa110_led_set(struct led_classdev *cdev,
			      enum led_brightness b)
{
	u8 reg = __raw_readb(SOFT_BASE);

	if (b != LED_OFF)
		reg |= 0x80;
	else
		reg &= ~0x80;

	__raw_writeb(reg, SOFT_BASE);
}

static enum led_brightness ebsa110_led_get(struct led_classdev *cdev)
{
	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;
}

/*
 * Since we may have triggers on any subsystem, defer registration
 * until after subsystem_init.
 */
fs_initcall(ebsa110_leds_init);
#endif
Commit	Line	Data
	1	/*
	2	* Driver for the LED found on the EBSA110 machine
	3	* Based on Versatile and RealView machine LED code
	4	*
	5	* License terms: GNU General Public License (GPL) version 2
	6	* Author: Bryan Wu <bryan.wu@canonical.com>
	7	*/
	8	#include <linux/kernel.h>
	9	#include <linux/init.h>
	10	#include <linux/io.h>
	11	#include <linux/slab.h>
	12	#include <linux/leds.h>
	13
	14	#include <asm/mach-types.h>
	15
	16	#include "core.h"
	17
	18	#if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS)
	19	static void ebsa110_led_set(struct led_classdev *cdev,
	20	enum led_brightness b)
	21	{
	22	u8 reg = __raw_readb(SOFT_BASE);
	23
	24	if (b != LED_OFF)
	25	reg \|= 0x80;
	26	else
	27	reg &= ~0x80;
	28
	29	__raw_writeb(reg, SOFT_BASE);
	30	}
	31
	32	static enum led_brightness ebsa110_led_get(struct led_classdev *cdev)
	33	{
	34	u8 reg = __raw_readb(SOFT_BASE);
	35
	36	return (reg & 0x80) ? LED_FULL : LED_OFF;
	37	}
	38
	39	static int __init ebsa110_leds_init(void)
	40	{
	41
	42	struct led_classdev *cdev;
	43	int ret;
	44
	45	if (!machine_is_ebsa110())
	46	return -ENODEV;
	47
	48	cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
	49	if (!cdev)
	50	return -ENOMEM;
	51
	52	cdev->name = "ebsa110:0";
	53	cdev->brightness_set = ebsa110_led_set;
	54	cdev->brightness_get = ebsa110_led_get;
	55	cdev->default_trigger = "heartbeat";
	56
	57	ret = led_classdev_register(NULL, cdev);
	58	if (ret < 0) {
	59	kfree(cdev);
	60	return ret;
	61	}
	62
	63	return 0;
	64	}
	65
	66	/*
	67	* Since we may have triggers on any subsystem, defer registration
	68	* until after subsystem_init.
	69	*/
	70	fs_initcall(ebsa110_leds_init);
	71	#endif