2 * LCD panel driver for Sharp LS037V7DW01
4 * Copyright (C) 2008 Nokia Corporation
5 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published by
9 * the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 * You should have received a copy of the GNU General Public License along with
17 * this program. If not, see <http://www.gnu.org/licenses/>.
20 #include <linux/module.h>
21 #include <linux/delay.h>
22 #include <linux/device.h>
23 #include <linux/backlight.h>
25 #include <linux/err.h>
26 #include <linux/slab.h>
28 #include <plat/display.h>
31 struct backlight_device *bl;
34 static struct omap_video_timings sharp_ls_timings = {
49 static int sharp_ls_bl_update_status(struct backlight_device *bl)
51 struct omap_dss_device *dssdev = dev_get_drvdata(&bl->dev);
54 if (!dssdev->set_backlight)
57 if (bl->props.fb_blank == FB_BLANK_UNBLANK &&
58 bl->props.power == FB_BLANK_UNBLANK)
59 level = bl->props.brightness;
63 return dssdev->set_backlight(dssdev, level);
66 static int sharp_ls_bl_get_brightness(struct backlight_device *bl)
68 if (bl->props.fb_blank == FB_BLANK_UNBLANK &&
69 bl->props.power == FB_BLANK_UNBLANK)
70 return bl->props.brightness;
75 static const struct backlight_ops sharp_ls_bl_ops = {
76 .get_brightness = sharp_ls_bl_get_brightness,
77 .update_status = sharp_ls_bl_update_status,
82 static int sharp_ls_panel_probe(struct omap_dss_device *dssdev)
84 struct backlight_properties props;
85 struct backlight_device *bl;
86 struct sharp_data *sd;
89 dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS |
91 dssdev->panel.acb = 0x28;
92 dssdev->panel.timings = sharp_ls_timings;
94 sd = kzalloc(sizeof(*sd), GFP_KERNEL);
98 dev_set_drvdata(&dssdev->dev, sd);
100 memset(&props, 0, sizeof(struct backlight_properties));
101 props.max_brightness = dssdev->max_backlight_level;
103 bl = backlight_device_register("sharp-ls", &dssdev->dev, dssdev,
104 &sharp_ls_bl_ops, &props);
112 bl->props.fb_blank = FB_BLANK_UNBLANK;
113 bl->props.power = FB_BLANK_UNBLANK;
114 bl->props.brightness = dssdev->max_backlight_level;
115 r = sharp_ls_bl_update_status(bl);
117 dev_err(&dssdev->dev, "failed to set lcd brightness\n");
122 static void sharp_ls_panel_remove(struct omap_dss_device *dssdev)
124 struct sharp_data *sd = dev_get_drvdata(&dssdev->dev);
125 struct backlight_device *bl = sd->bl;
127 bl->props.power = FB_BLANK_POWERDOWN;
128 sharp_ls_bl_update_status(bl);
129 backlight_device_unregister(bl);
134 static int sharp_ls_power_on(struct omap_dss_device *dssdev)
138 if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
141 r = omapdss_dpi_display_enable(dssdev);
145 /* wait couple of vsyncs until enabling the LCD */
148 if (dssdev->platform_enable) {
149 r = dssdev->platform_enable(dssdev);
156 omapdss_dpi_display_disable(dssdev);
161 static void sharp_ls_power_off(struct omap_dss_device *dssdev)
163 if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
166 if (dssdev->platform_disable)
167 dssdev->platform_disable(dssdev);
169 /* wait at least 5 vsyncs after disabling the LCD */
173 omapdss_dpi_display_disable(dssdev);
176 static int sharp_ls_panel_enable(struct omap_dss_device *dssdev)
179 r = sharp_ls_power_on(dssdev);
180 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
184 static void sharp_ls_panel_disable(struct omap_dss_device *dssdev)
186 sharp_ls_power_off(dssdev);
187 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
190 static int sharp_ls_panel_suspend(struct omap_dss_device *dssdev)
192 sharp_ls_power_off(dssdev);
193 dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
197 static int sharp_ls_panel_resume(struct omap_dss_device *dssdev)
200 r = sharp_ls_power_on(dssdev);
201 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
205 static struct omap_dss_driver sharp_ls_driver = {
206 .probe = sharp_ls_panel_probe,
207 .remove = sharp_ls_panel_remove,
209 .enable = sharp_ls_panel_enable,
210 .disable = sharp_ls_panel_disable,
211 .suspend = sharp_ls_panel_suspend,
212 .resume = sharp_ls_panel_resume,
215 .name = "sharp_ls_panel",
216 .owner = THIS_MODULE,
220 static int __init sharp_ls_panel_drv_init(void)
222 return omap_dss_register_driver(&sharp_ls_driver);
225 static void __exit sharp_ls_panel_drv_exit(void)
227 omap_dss_unregister_driver(&sharp_ls_driver);
230 module_init(sharp_ls_panel_drv_init);
231 module_exit(sharp_ls_panel_drv_exit);
232 MODULE_LICENSE("GPL");