1/*
 2 * GMA500 Backlight Interface
 3 *
 4 * Copyright (c) 2009-2011, Intel Corporation.
 5 *
 6 * This program is free software; you can redistribute it and/or modify it
 7 * under the terms and conditions of the GNU General Public License,
 8 * version 2, as published by the Free Software Foundation.
 9 *
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
13 * more details.
14 *
15 * You should have received a copy of the GNU General Public License along with
16 * this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Authors: Eric Knopp
20 *
21 */
22
23#include "psb_drv.h"
24#include "psb_intel_reg.h"
25#include "psb_intel_drv.h"
26#include "intel_bios.h"
27#include "power.h"
28
29int gma_backlight_init(struct drm_device *dev)
30{
31#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
32	struct drm_psb_private *dev_priv = dev->dev_private;
33	return dev_priv->ops->backlight_init(dev);
34#else
35	return 0;
36#endif
37}
38
39void gma_backlight_exit(struct drm_device *dev)
40{
41#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
42	struct drm_psb_private *dev_priv = dev->dev_private;
43	if (dev_priv->backlight_device) {
44		dev_priv->backlight_device->props.brightness = 0;
45		backlight_update_status(dev_priv->backlight_device);
46		backlight_device_unregister(dev_priv->backlight_device);
47	}
48#endif
49}