1/* Copyright (c) 2008-2009, Code Aurora Forum. All rights reserved. 2 * 3 * This program is free software; you can redistribute it and/or modify 4 * it under the terms of the GNU General Public License version 2 and 5 * only version 2 as published by the Free Software Foundation. 6 * 7 * This program is distributed in the hope that it will be useful, 8 * but WITHOUT ANY WARRANTY; without even the implied warranty of 9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 10 * GNU General Public License for more details. 11 * 12 * You should have received a copy of the GNU General Public License 13 * along with this program; if not, write to the Free Software 14 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 15 * 02110-1301, USA. 16 */ 17 18#include <linux/module.h> 19#include <linux/moduleparam.h> 20#include <linux/kernel.h> 21#include <linux/slab.h> 22#include <linux/fb.h> 23#include <linux/string.h> 24#include <linux/version.h> 25#include <linux/backlight.h> 26 27#include "msm_fb.h" 28 29static int msm_fb_bl_get_brightness(struct backlight_device *pbd) 30{ 31 return pbd->props.brightness; 32} 33 34static int msm_fb_bl_update_status(struct backlight_device *pbd) 35{ 36 struct msm_fb_data_type *mfd = bl_get_data(pbd); 37 __u32 bl_lvl; 38 39 bl_lvl = pbd->props.brightness; 40 bl_lvl = mfd->fbi->bl_curve[bl_lvl]; 41 msm_fb_set_backlight(mfd, bl_lvl, 1); 42 return 0; 43} 44 45static struct backlight_ops msm_fb_bl_ops = { 46 .get_brightness = msm_fb_bl_get_brightness, 47 .update_status = msm_fb_bl_update_status, 48}; 49 50void msm_fb_config_backlight(struct msm_fb_data_type *mfd) 51{ 52 struct msm_fb_panel_data *pdata; 53 struct backlight_device *pbd; 54 struct fb_info *fbi; 55 char name[16]; 56 57 fbi = mfd->fbi; 58 pdata = (struct msm_fb_panel_data *)mfd->pdev->dev.platform_data; 59 60 if ((pdata) && (pdata->set_backlight)) { 61 snprintf(name, sizeof(name), "msmfb_bl%d", mfd->index); 62 pbd = 63 backlight_device_register(name, fbi->dev, mfd, 64 &msm_fb_bl_ops); 65 if (!IS_ERR(pbd)) { 66 fbi->bl_dev = pbd; 67 fb_bl_default_curve(fbi, 68 0, 69 mfd->panel_info.bl_min, 70 mfd->panel_info.bl_max); 71 pbd->props.max_brightness = FB_BACKLIGHT_LEVELS - 1; 72 pbd->props.brightness = FB_BACKLIGHT_LEVELS - 1; 73 backlight_update_status(pbd); 74 } else { 75 fbi->bl_dev = NULL; 76 printk(KERN_ERR "msm_fb: backlight_device_register failed!\n"); 77 } 78 } 79} 80