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/*
* LCD panel driver for Sharp LS037V7DW01
*
* Copyright (C) 2008 Nokia Corporation
* Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
*
* 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 program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/regulator/consumer.h>
#include <linux/err.h>
#include <plat/display.h>
struct sharp_data {
/* XXX This regulator should actually be in SDP board file, not here,
* as it doesn't actually power the LCD, but something else that
* affects the output to LCD (I think. Somebody clarify). It doesn't do
* harm here, as SDP is the only board using this currently */
struct regulator *vdvi_reg;
};
static struct omap_video_timings sharp_ls_timings = {
.x_res = 480,
.y_res = 640,
.pixel_clock = 19200,
.hsw = 2,
.hfp = 1,
.hbp = 28,
.vsw = 1,
.vfp = 1,
.vbp = 1,
};
static int sharp_ls_panel_probe(struct omap_dss_device *dssdev)
{
struct sharp_data *sd;
dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS |
OMAP_DSS_LCD_IHS;
dssdev->panel.acb = 0x28;
dssdev->panel.timings = sharp_ls_timings;
sd = kzalloc(sizeof(*sd), GFP_KERNEL);
if (!sd)
return -ENOMEM;
dev_set_drvdata(&dssdev->dev, sd);
sd->vdvi_reg = regulator_get(&dssdev->dev, "vdvi");
if (IS_ERR(sd->vdvi_reg)) {
kfree(sd);
pr_err("failed to get VDVI regulator\n");
return PTR_ERR(sd->vdvi_reg);
}
return 0;
}
static void sharp_ls_panel_remove(struct omap_dss_device *dssdev)
{
struct sharp_data *sd = dev_get_drvdata(&dssdev->dev);
regulator_put(sd->vdvi_reg);
kfree(sd);
}
static int sharp_ls_panel_enable(struct omap_dss_device *dssdev)
{
struct sharp_data *sd = dev_get_drvdata(&dssdev->dev);
int r = 0;
/* wait couple of vsyncs until enabling the LCD */
msleep(50);
regulator_enable(sd->vdvi_reg);
if (dssdev->platform_enable)
r = dssdev->platform_enable(dssdev);
return r;
}
static void sharp_ls_panel_disable(struct omap_dss_device *dssdev)
{
struct sharp_data *sd = dev_get_drvdata(&dssdev->dev);
if (dssdev->platform_disable)
dssdev->platform_disable(dssdev);
regulator_disable(sd->vdvi_reg);
/* wait at least 5 vsyncs after disabling the LCD */
msleep(100);
}
static int sharp_ls_panel_suspend(struct omap_dss_device *dssdev)
{
sharp_ls_panel_disable(dssdev);
return 0;
}
static int sharp_ls_panel_resume(struct omap_dss_device *dssdev)
{
return sharp_ls_panel_enable(dssdev);
}
static struct omap_dss_driver sharp_ls_driver = {
.probe = sharp_ls_panel_probe,
.remove = sharp_ls_panel_remove,
.enable = sharp_ls_panel_enable,
.disable = sharp_ls_panel_disable,
.suspend = sharp_ls_panel_suspend,
.resume = sharp_ls_panel_resume,
.driver = {
.name = "sharp_ls_panel",
.owner = THIS_MODULE,
},
};
static int __init sharp_ls_panel_drv_init(void)
{
return omap_dss_register_driver(&sharp_ls_driver);
}
static void __exit sharp_ls_panel_drv_exit(void)
{
omap_dss_unregister_driver(&sharp_ls_driver);
}
module_init(sharp_ls_panel_drv_init);
module_exit(sharp_ls_panel_drv_exit);
MODULE_LICENSE("GPL");
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