Attachment 2093 Details for Bug 5570 – Alternate apple_bl.c file

Alternate apple_bl.c file

apple_bl.c (text/x-csrc), 9.20 KB, created by Andy Liebman on 2012-04-24 15:57:18 CEST

(hide)

Description:

Filename:

MIME Type:

Creator: Andy Liebman

Created: 2012-04-24 15:57:18 CEST

Size: 9.20 KB

patch

obsolete

>/*
> *  Backlight Driver for Intel-based Apples
> *
> *  Copyright (c) Red Hat <mjg@redhat.com>
> *  Based on code from Pommed:
> *  Copyright (C) 2006 Nicolas Boichat <nicolas @boichat.ch>
> *  Copyright (C) 2006 Felipe Alfaro Solana <felipe_alfaro @linuxmail.org>
> *  Copyright (C) 2007 Julien BLACHE <jb@jblache.org>
> *
> *  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.
> *
> *  This driver triggers SMIs which cause the firmware to change the
> *  backlight brightness. This is icky in many ways, but it's impractical to
> *  get at the firmware code in order to figure out what it's actually doing.
> */
>
>#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
>
>#include <linux/module.h>
>#include <linux/kernel.h>
>#include <linux/init.h>
>#include <linux/backlight.h>
>#include <linux/err.h>
>#include <linux/io.h>
>#include <linux/pci.h>
>#include <linux/acpi.h>
>
>#define APPLE_BL_ID	"APP0002"
>#define APPLE_GMUX_ID	"APP000B"
>
>struct apple_bl_data {
>	const char *name;
>	int max_brightness;
>
>	/* I/O resource to allocate. */
>	unsigned long iostart;
>	unsigned long iolen;
>
>	/* Backlight device */
>	struct backlight_device *bdev;
>
>	/* Backlight operations structure. */
>	int (*get_brightness)(struct apple_bl_data *);
>	void (*set_brightness)(struct apple_bl_data *, int);
>};
>
>/*
> * gmux port offsets. Many of these are not yet used, but may be in the
> * future, and it's useful to have them documented here anyhow.
> */
>#define GMUX_PORT_VERSION_MAJOR		0x04
>#define GMUX_PORT_VERSION_MINOR		0x05
>#define GMUX_PORT_VERSION_RELEASE	0x06
>#define GMUX_PORT_SWITCH_DISPLAY	0x10
>#define GMUX_PORT_SWITCH_GET_DISPLAY	0x11
>#define GMUX_PORT_INTERRUPT_ENABLE	0x14
>#define GMUX_PORT_INTERRUPT_STATUS	0x16
>#define GMUX_PORT_SWITCH_DDC		0x28
>#define GMUX_PORT_SWITCH_EXTERNAL	0x40
>#define GMUX_PORT_SWITCH_GET_EXTERNAL	0x41
>#define GMUX_PORT_DISCRETE_POWER	0x50
>#define GMUX_PORT_MAX_BRIGHTNESS	0x70
>#define GMUX_PORT_BRIGHTNESS		0x74
>
>#define GMUX_MIN_IO_LEN			(GMUX_PORT_BRIGHTNESS + 4)
>
>#define GMUX_INTERRUPT_ENABLE		0xff
>#define GMUX_INTERRUPT_DISABLE		0x00
>
>#define GMUX_INTERRUPT_STATUS_ACTIVE	0
>#define GMUX_INTERRUPT_STATUS_DISPLAY	(1 << 0)
>#define GMUX_INTERRUPT_STATUS_POWER	(1 << 2)
>#define GMUX_INTERRUPT_STATUS_HOTPLUG	(1 << 3)
>
>#define GMUX_BRIGHTNESS_MASK		0x00ffffff
>#define GMUX_MAX_BRIGHTNESS		GMUX_BRIGHTNESS_MASK
>
>/*
> * Implementation for machines with Intel chipset.
> */
>static void intel_chipset_set_brightness(struct apple_bl_data *bl_data,
>					 int intensity)
>{
>	outb(0x04 | (intensity << 4), 0xb3);
>	outb(0xbf, 0xb2);
>}
>
>static int intel_chipset_get_brightness(struct apple_bl_data *bl_data)
>{
>	int intensity;
>
>	outb(0x03, 0xb3);
>	outb(0xbf, 0xb2);
>	intensity = inb(0xb3) >> 4;
>
>	pr_debug("read brightness of %d\n", intensity);
>
>	return intensity;
>}
>
>/*
> * Implementation for machines with Nvidia chipset.
> */
>static void nvidia_chipset_set_brightness(struct apple_bl_data *bl_data,
>					  int intensity)
>{
>	outb(0x04 | (intensity << 4), 0x52f);
>	outb(0xbf, 0x52e);
>}
>
>static int nvidia_chipset_get_brightness(struct apple_bl_data *bl_data)
>{
>	int intensity;
>
>	outb(0x03, 0x52f);
>	outb(0xbf, 0x52e);
>	intensity = inb(0x52f) >> 4;
>
>	pr_debug("read brightness of %d\n", intensity);
>
>	return intensity;
>}
>
>/*
> * Implementation for gmux backlight control
> */
>static void gmux_set_brightness(struct apple_bl_data *bl_data, int intensity)
>{
>	/*
>	 * Older versions of gmux require writing out lower bytes first
>	 * then setting upper byte to 0 to flush values. Newer versions
>	 * accept a single u32 write, but the old method works as well
>	 * so just use it for everything.
>	 */
>	outb(intensity, bl_data->iostart + GMUX_PORT_BRIGHTNESS);
>	outb(intensity >> 8, bl_data->iostart + GMUX_PORT_BRIGHTNESS + 1);
>	outb(intensity >> 16, bl_data->iostart + GMUX_PORT_BRIGHTNESS + 2);
>	outb(0, bl_data->iostart + GMUX_PORT_BRIGHTNESS + 3);
>}
>
>static int gmux_get_brightness(struct apple_bl_data *bl_data)
>{
>	return inl(bl_data->iostart + GMUX_PORT_BRIGHTNESS) & GMUX_BRIGHTNESS_MASK;
>}
>
>/*
> * Backlight device class operations
> */
>static int apple_bl_get_brightness(struct backlight_device *bd)
>{
>	struct apple_bl_data *bl_data = bl_get_data(bd);
>	return bl_data->get_brightness(bl_data);
>}
>
>static int apple_bl_update_status(struct backlight_device *bd)
>{
>	struct apple_bl_data *bl_data = bl_get_data(bd);
>
>	bl_data->set_brightness(bl_data, bd->props.brightness);
>	return 0;
>}
>
>static const struct backlight_ops apple_bl_ops = {
>	.get_brightness = apple_bl_get_brightness,
>	.update_status = apple_bl_update_status,
>};
>
>static int __devinit legacy_bl_init(struct apple_bl_data *bl_data,
>				    struct acpi_device *dev)
>{
>	struct pci_dev *host;
>	unsigned short vendor;
>
>	host = pci_get_bus_and_slot(0, 0);
>	if (!host) {
>		pr_err("unable to find PCI host\n");
>		return -ENODEV;
>	}
>
>	vendor = host->vendor;
>	pci_dev_put(host);
>
>	switch (host->vendor) {
>	case PCI_VENDOR_ID_INTEL:
>		bl_data->iostart = 0xb2;
>		bl_data->iolen = 2;
>		bl_data->get_brightness = intel_chipset_get_brightness;
>		bl_data->set_brightness = intel_chipset_set_brightness;
>		break;
>	case PCI_VENDOR_ID_NVIDIA:
>		bl_data->iostart = 0x52e;
>		bl_data->iolen = 2;
>		bl_data->get_brightness = nvidia_chipset_get_brightness;
>		bl_data->set_brightness = nvidia_chipset_set_brightness;
>		break;
>	default:
>		pr_err("no backlight support for PCI vendor %hu\n", host->vendor);
>		return -ENODEV;
>	}
>
>	bl_data->name = "apple_backlight";
>	bl_data->max_brightness = 15;
>	return 0;
>}
>
>static acpi_status __devinit gmux_get_resources(struct acpi_resource *res,
>						void *context)
>{
>	struct apple_bl_data *bl_data = context;
>	struct acpi_resource_io *io;
>
>	if (res->type == ACPI_RESOURCE_TYPE_IO) {
>		io = &res->data.io;
>		bl_data->iostart = io->minimum;
>		bl_data->iolen = io->maximum - io->minimum;
>
>		return AE_CTRL_TERMINATE;
>	}
>
>	return AE_OK;
>}
>
>static int __devinit gmux_init(struct apple_bl_data *bl_data,
>			       struct acpi_device *dev)
>{
>	acpi_status status;
>
>	status = acpi_walk_resources(dev->handle, METHOD_NAME__CRS,
>				     gmux_get_resources, bl_data);
>	if (ACPI_FAILURE(status))
>		return -ENXIO;
>
>	if (!bl_data->iostart) {
>		pr_err("Failed to find gmux I/O resources\n");
>		return -ENXIO;
>	}
>
>	if (bl_data->iolen < GMUX_MIN_IO_LEN) {
>		pr_err("gmux I/O region too small (%lu < %u)\n",
>		       bl_data->iolen, GMUX_MIN_IO_LEN);
>		return -ENXIO;
>	}
>
>	bl_data->name = "gmux_backlight";
>	bl_data->get_brightness = gmux_get_brightness;
>	bl_data->set_brightness = gmux_set_brightness;
>	bl_data->max_brightness =
>		inl(bl_data->iostart + GMUX_PORT_MAX_BRIGHTNESS);
>
>	/*
>	 * Currently it's assumed that the maximum brightness is less
>	 * than 2^24 for compatibility with old gmux versions. Cap the
>	 * max brightness at this max value, but print a warning if
>	 * the hardware reports something higher so it can be fixed.
>	 */
>	if (WARN_ON(bl_data->max_brightness > GMUX_MAX_BRIGHTNESS))
>		bl_data->max_brightness = GMUX_MAX_BRIGHTNESS;
>
>	return 0;
>}
>
>static int __devinit apple_bl_add(struct acpi_device *dev)
>{
>	struct apple_bl_data *bl_data;
>	struct backlight_properties props;
>	struct backlight_device *bdev;
>	int intensity;
>	int ret = -ENODEV;
>
>	bl_data = kzalloc(sizeof(*bl_data), GFP_KERNEL);
>	if (!bl_data)
>		return -ENOMEM;
>	dev->driver_data = bl_data;
>
>	if (!strcmp(acpi_device_hid(dev), APPLE_GMUX_ID))
>		ret = gmux_init(bl_data, dev);
>	else
>		ret = legacy_bl_init(bl_data, dev);
>
>	if (ret)
>		goto err_free;
>
>	/* Check that the hardware responds - this may not work under EFI */
>
>	intensity = bl_data->get_brightness(bl_data);
>
>	if (!intensity) {
>		bl_data->set_brightness(bl_data, 1);
>		if (!bl_data->get_brightness(bl_data)) {
>			ret = -ENODEV;
>			goto err_free;
>		}
>
>		bl_data->set_brightness(bl_data, 0);
>	}
>
>	if (!request_region(bl_data->iostart, bl_data->iolen,
>			    "Apple backlight")) {
>		ret = -ENXIO;
>		goto err_free;
>	}
>
>	memset(&props, 0, sizeof(struct backlight_properties));
>	props.type = BACKLIGHT_PLATFORM;
>	props.max_brightness = bl_data->max_brightness;
>	bdev = backlight_device_register(bl_data->name, &dev->dev, bl_data,
>					 &apple_bl_ops, &props);
>
>	if (IS_ERR(bdev)) {
>		ret = PTR_ERR(bdev);
>		goto err_release;
>	}
>
>	bl_data->bdev = bdev;
>	bdev->props.brightness = intensity;
>	backlight_update_status(bdev);
>
>	return 0;
>
>err_release:
>	release_region(bl_data->iostart, bl_data->iolen);
>err_free:
>	kfree(bl_data);
>	return ret;
>}
>
>static int __devexit apple_bl_remove(struct acpi_device *dev, int type)
>{
>	struct apple_bl_data *bl_data = dev->driver_data;
>
>	backlight_device_unregister(bl_data->bdev);
>	release_region(bl_data->iostart, bl_data->iolen);
>	kfree(bl_data);
>
>	return 0;
>}
>
>static const struct acpi_device_id apple_bl_ids[] = {
>	{APPLE_BL_ID, 0},
>	{APPLE_GMUX_ID, 0},
>	{"", 0},
>};
>
>static struct acpi_driver apple_bl_driver = {
>	.name = "Apple backlight",
>	.ids = apple_bl_ids,
>	.ops = {
>		.add = apple_bl_add,
>		.remove = __devexit_p(apple_bl_remove),
>	},
>};
>
>static int __init apple_bl_init(void)
>{
>	return acpi_bus_register_driver(&apple_bl_driver);
>}
>
>static void __exit apple_bl_exit(void)
>{
>	acpi_bus_unregister_driver(&apple_bl_driver);
>}
>
>module_init(apple_bl_init);
>module_exit(apple_bl_exit);
>
>MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
>MODULE_DESCRIPTION("Apple Backlight Driver");
>MODULE_LICENSE("GPL");
>MODULE_DEVICE_TABLE(acpi, apple_bl_ids);
>MODULE_ALIAS("mbp_nvidia_bl");

/*
 *  Backlight Driver for Intel-based Apples
 *
 *  Copyright (c) Red Hat <mjg@redhat.com>
 *  Based on code from Pommed:
 *  Copyright (C) 2006 Nicolas Boichat <nicolas @boichat.ch>
 *  Copyright (C) 2006 Felipe Alfaro Solana <felipe_alfaro @linuxmail.org>
 *  Copyright (C) 2007 Julien BLACHE <jb@jblache.org>
 *
 *  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.
 *
 *  This driver triggers SMIs which cause the firmware to change the
 *  backlight brightness. This is icky in many ways, but it's impractical to
 *  get at the firmware code in order to figure out what it's actually doing.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/backlight.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/pci.h>
#include <linux/acpi.h>

#define APPLE_BL_ID	"APP0002"
#define APPLE_GMUX_ID	"APP000B"

struct apple_bl_data {
	const char *name;
	int max_brightness;

	/* I/O resource to allocate. */
	unsigned long iostart;
	unsigned long iolen;

	/* Backlight device */
	struct backlight_device *bdev;

	/* Backlight operations structure. */
	int (*get_brightness)(struct apple_bl_data *);
	void (*set_brightness)(struct apple_bl_data *, int);
};

/*
 * gmux port offsets. Many of these are not yet used, but may be in the
 * future, and it's useful to have them documented here anyhow.
 */
#define GMUX_PORT_VERSION_MAJOR		0x04
#define GMUX_PORT_VERSION_MINOR		0x05
#define GMUX_PORT_VERSION_RELEASE	0x06
#define GMUX_PORT_SWITCH_DISPLAY	0x10
#define GMUX_PORT_SWITCH_GET_DISPLAY	0x11
#define GMUX_PORT_INTERRUPT_ENABLE	0x14
#define GMUX_PORT_INTERRUPT_STATUS	0x16
#define GMUX_PORT_SWITCH_DDC		0x28
#define GMUX_PORT_SWITCH_EXTERNAL	0x40
#define GMUX_PORT_SWITCH_GET_EXTERNAL	0x41
#define GMUX_PORT_DISCRETE_POWER	0x50
#define GMUX_PORT_MAX_BRIGHTNESS	0x70
#define GMUX_PORT_BRIGHTNESS		0x74

#define GMUX_MIN_IO_LEN			(GMUX_PORT_BRIGHTNESS + 4)

#define GMUX_INTERRUPT_ENABLE		0xff
#define GMUX_INTERRUPT_DISABLE		0x00

#define GMUX_INTERRUPT_STATUS_ACTIVE	0
#define GMUX_INTERRUPT_STATUS_DISPLAY	(1 << 0)
#define GMUX_INTERRUPT_STATUS_POWER	(1 << 2)
#define GMUX_INTERRUPT_STATUS_HOTPLUG	(1 << 3)

#define GMUX_BRIGHTNESS_MASK		0x00ffffff
#define GMUX_MAX_BRIGHTNESS		GMUX_BRIGHTNESS_MASK

/*
 * Implementation for machines with Intel chipset.
 */
static void intel_chipset_set_brightness(struct apple_bl_data *bl_data,
					 int intensity)
{
	outb(0x04 | (intensity << 4), 0xb3);
	outb(0xbf, 0xb2);
}

static int intel_chipset_get_brightness(struct apple_bl_data *bl_data)
{
	int intensity;

	outb(0x03, 0xb3);
	outb(0xbf, 0xb2);
	intensity = inb(0xb3) >> 4;

	pr_debug("read brightness of %d\n", intensity);

	return intensity;
}

/*
 * Implementation for machines with Nvidia chipset.
 */
static void nvidia_chipset_set_brightness(struct apple_bl_data *bl_data,
					  int intensity)
{
	outb(0x04 | (intensity << 4), 0x52f);
	outb(0xbf, 0x52e);
}

static int nvidia_chipset_get_brightness(struct apple_bl_data *bl_data)
{
	int intensity;

	outb(0x03, 0x52f);
	outb(0xbf, 0x52e);
	intensity = inb(0x52f) >> 4;

	pr_debug("read brightness of %d\n", intensity);

	return intensity;
}

/*
 * Implementation for gmux backlight control
 */
static void gmux_set_brightness(struct apple_bl_data *bl_data, int intensity)
{
	/*
	 * Older versions of gmux require writing out lower bytes first
	 * then setting upper byte to 0 to flush values. Newer versions
	 * accept a single u32 write, but the old method works as well
	 * so just use it for everything.
	 */
	outb(intensity, bl_data->iostart + GMUX_PORT_BRIGHTNESS);
	outb(intensity >> 8, bl_data->iostart + GMUX_PORT_BRIGHTNESS + 1);
	outb(intensity >> 16, bl_data->iostart + GMUX_PORT_BRIGHTNESS + 2);
	outb(0, bl_data->iostart + GMUX_PORT_BRIGHTNESS + 3);
}

static int gmux_get_brightness(struct apple_bl_data *bl_data)
{
	return inl(bl_data->iostart + GMUX_PORT_BRIGHTNESS) & GMUX_BRIGHTNESS_MASK;
}

/*
 * Backlight device class operations
 */
static int apple_bl_get_brightness(struct backlight_device *bd)
{
	struct apple_bl_data *bl_data = bl_get_data(bd);
	return bl_data->get_brightness(bl_data);
}

static int apple_bl_update_status(struct backlight_device *bd)
{
	struct apple_bl_data *bl_data = bl_get_data(bd);

	bl_data->set_brightness(bl_data, bd->props.brightness);
	return 0;
}

static const struct backlight_ops apple_bl_ops = {
	.get_brightness = apple_bl_get_brightness,
	.update_status = apple_bl_update_status,
};

static int __devinit legacy_bl_init(struct apple_bl_data *bl_data,
				    struct acpi_device *dev)
{
	struct pci_dev *host;
	unsigned short vendor;

	host = pci_get_bus_and_slot(0, 0);
	if (!host) {
		pr_err("unable to find PCI host\n");
		return -ENODEV;
	}

	vendor = host->vendor;
	pci_dev_put(host);

	switch (host->vendor) {
	case PCI_VENDOR_ID_INTEL:
		bl_data->iostart = 0xb2;
		bl_data->iolen = 2;
		bl_data->get_brightness = intel_chipset_get_brightness;
		bl_data->set_brightness = intel_chipset_set_brightness;
		break;
	case PCI_VENDOR_ID_NVIDIA:
		bl_data->iostart = 0x52e;
		bl_data->iolen = 2;
		bl_data->get_brightness = nvidia_chipset_get_brightness;
		bl_data->set_brightness = nvidia_chipset_set_brightness;
		break;
	default:
		pr_err("no backlight support for PCI vendor %hu\n", host->vendor);
		return -ENODEV;
	}

	bl_data->name = "apple_backlight";
	bl_data->max_brightness = 15;
	return 0;
}

static acpi_status __devinit gmux_get_resources(struct acpi_resource *res,
						void *context)
{
	struct apple_bl_data *bl_data = context;
	struct acpi_resource_io *io;

	if (res->type == ACPI_RESOURCE_TYPE_IO) {
		io = &res->data.io;
		bl_data->iostart = io->minimum;
		bl_data->iolen = io->maximum - io->minimum;

		return AE_CTRL_TERMINATE;
	}

	return AE_OK;
}

static int __devinit gmux_init(struct apple_bl_data *bl_data,
			       struct acpi_device *dev)
{
	acpi_status status;

	status = acpi_walk_resources(dev->handle, METHOD_NAME__CRS,
				     gmux_get_resources, bl_data);
	if (ACPI_FAILURE(status))
		return -ENXIO;

	if (!bl_data->iostart) {
		pr_err("Failed to find gmux I/O resources\n");
		return -ENXIO;
	}

	if (bl_data->iolen < GMUX_MIN_IO_LEN) {
		pr_err("gmux I/O region too small (%lu < %u)\n",
		       bl_data->iolen, GMUX_MIN_IO_LEN);
		return -ENXIO;
	}

	bl_data->name = "gmux_backlight";
	bl_data->get_brightness = gmux_get_brightness;
	bl_data->set_brightness = gmux_set_brightness;
	bl_data->max_brightness =
		inl(bl_data->iostart + GMUX_PORT_MAX_BRIGHTNESS);

	/*
	 * Currently it's assumed that the maximum brightness is less
	 * than 2^24 for compatibility with old gmux versions. Cap the
	 * max brightness at this max value, but print a warning if
	 * the hardware reports something higher so it can be fixed.
	 */
	if (WARN_ON(bl_data->max_brightness > GMUX_MAX_BRIGHTNESS))
		bl_data->max_brightness = GMUX_MAX_BRIGHTNESS;

	return 0;
}

static int __devinit apple_bl_add(struct acpi_device *dev)
{
	struct apple_bl_data *bl_data;
	struct backlight_properties props;
	struct backlight_device *bdev;
	int intensity;
	int ret = -ENODEV;

	bl_data = kzalloc(sizeof(*bl_data), GFP_KERNEL);
	if (!bl_data)
		return -ENOMEM;
	dev->driver_data = bl_data;

	if (!strcmp(acpi_device_hid(dev), APPLE_GMUX_ID))
		ret = gmux_init(bl_data, dev);
	else
		ret = legacy_bl_init(bl_data, dev);

	if (ret)
		goto err_free;

	/* Check that the hardware responds - this may not work under EFI */

	intensity = bl_data->get_brightness(bl_data);

	if (!intensity) {
		bl_data->set_brightness(bl_data, 1);
		if (!bl_data->get_brightness(bl_data)) {
			ret = -ENODEV;
			goto err_free;
		}

		bl_data->set_brightness(bl_data, 0);
	}

	if (!request_region(bl_data->iostart, bl_data->iolen,
			    "Apple backlight")) {
		ret = -ENXIO;
		goto err_free;
	}

	memset(&props, 0, sizeof(struct backlight_properties));
	props.type = BACKLIGHT_PLATFORM;
	props.max_brightness = bl_data->max_brightness;
	bdev = backlight_device_register(bl_data->name, &dev->dev, bl_data,
					 &apple_bl_ops, &props);

	if (IS_ERR(bdev)) {
		ret = PTR_ERR(bdev);
		goto err_release;
	}

	bl_data->bdev = bdev;
	bdev->props.brightness = intensity;
	backlight_update_status(bdev);

	return 0;

err_release:
	release_region(bl_data->iostart, bl_data->iolen);
err_free:
	kfree(bl_data);
	return ret;
}

static int __devexit apple_bl_remove(struct acpi_device *dev, int type)
{
	struct apple_bl_data *bl_data = dev->driver_data;

	backlight_device_unregister(bl_data->bdev);
	release_region(bl_data->iostart, bl_data->iolen);
	kfree(bl_data);

	return 0;
}

static const struct acpi_device_id apple_bl_ids[] = {
	{APPLE_BL_ID, 0},
	{APPLE_GMUX_ID, 0},
	{"", 0},
};

static struct acpi_driver apple_bl_driver = {
	.name = "Apple backlight",
	.ids = apple_bl_ids,
	.ops = {
		.add = apple_bl_add,
		.remove = __devexit_p(apple_bl_remove),
	},
};

static int __init apple_bl_init(void)
{
	return acpi_bus_register_driver(&apple_bl_driver);
}

static void __exit apple_bl_exit(void)
{
	acpi_bus_unregister_driver(&apple_bl_driver);
}

module_init(apple_bl_init);
module_exit(apple_bl_exit);

MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
MODULE_DESCRIPTION("Apple Backlight Driver");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(acpi, apple_bl_ids);
MODULE_ALIAS("mbp_nvidia_bl");

Actions: View

Attachments on bug 5570: 2079 | 2080 | 2093 | 2094 | 2095 | 2096 | 2097