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Commit 2b88c5bc authored by Vaibhav Hiremath's avatar Vaibhav Hiremath Committed by Tomi Valkeinen
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OMAP: LCD LS037V7DW01: Add Backlight driver support 



Tested on OMAP3EVM for OMAP3530 and AM/DM 3730.

Signed-off-by: default avatarVaibhav Hiremath <hvaibhav@ti.com>
[tomi.valkeinen@nokia.com: added slab.h include]
[tomi.valkeinen@nokia.com: added dependency to BACKLIGHT_CLASS_DEVICE]
Signed-off-by: default avatarTomi Valkeinen <tomi.valkeinen@nokia.com>
parent 6df37271

drivers/video/omap2/displays/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -10,6 +10,7 @@ config PANEL_GENERIC 
config PANEL_SHARP_LS037V7DW01

        tristate "Sharp LS037V7DW01 LCD Panel"

        depends on OMAP2_DSS

        select BACKLIGHT_CLASS_DEVICE

        help

          LCD Panel used in TI's SDP3430 and EVM boards

drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c

+78 −0
Original line number Diff line number Diff line
@@ -20,10 +20,17 @@ 
#include <linux/module.h>

#include <linux/delay.h>

#include <linux/device.h>

#include <linux/backlight.h>

#include <linux/fb.h>

#include <linux/err.h>

#include <linux/slab.h>



#include <plat/display.h>



struct sharp_data {

	struct backlight_device *bl;

};



static struct omap_video_timings sharp_ls_timings = {

	.x_res = 480,

	.y_res = 640,
@@ -39,18 +46,89 @@ static struct omap_video_timings sharp_ls_timings = { 
	.vbp		= 1,

};



static int sharp_ls_bl_update_status(struct backlight_device *bl)

{

	struct omap_dss_device *dssdev = dev_get_drvdata(&bl->dev);

	int level;



	if (!dssdev->set_backlight)

		return -EINVAL;



	if (bl->props.fb_blank == FB_BLANK_UNBLANK &&

			bl->props.power == FB_BLANK_UNBLANK)

		level = bl->props.brightness;

	else

		level = 0;



	return dssdev->set_backlight(dssdev, level);

}



static int sharp_ls_bl_get_brightness(struct backlight_device *bl)

{

	if (bl->props.fb_blank == FB_BLANK_UNBLANK &&

			bl->props.power == FB_BLANK_UNBLANK)

		return bl->props.brightness;



	return 0;

}



static const struct backlight_ops sharp_ls_bl_ops = {

	.get_brightness = sharp_ls_bl_get_brightness,

	.update_status  = sharp_ls_bl_update_status,

};







static int sharp_ls_panel_probe(struct omap_dss_device *dssdev)

{

	struct backlight_properties props;

	struct backlight_device *bl;

	struct sharp_data *sd;

	int r;



	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);



	memset(&props, 0, sizeof(struct backlight_properties));

	props.max_brightness = dssdev->max_backlight_level;



	bl = backlight_device_register("sharp-ls", &dssdev->dev, dssdev,

			&sharp_ls_bl_ops, &props);

	if (IS_ERR(bl)) {

		r = PTR_ERR(bl);

		kfree(sd);

		return r;

	}

	sd->bl = bl;



	bl->props.fb_blank = FB_BLANK_UNBLANK;

	bl->props.power = FB_BLANK_UNBLANK;

	bl->props.brightness = dssdev->max_backlight_level;

	r = sharp_ls_bl_update_status(bl);

	if (r < 0)

		dev_err(&dssdev->dev, "failed to set lcd brightness\n");



	return 0;

}



static void sharp_ls_panel_remove(struct omap_dss_device *dssdev)

{

	struct sharp_data *sd = dev_get_drvdata(&dssdev->dev);

	struct backlight_device *bl = sd->bl;



	bl->props.power = FB_BLANK_POWERDOWN;

	sharp_ls_bl_update_status(bl);

	backlight_device_unregister(bl);



	kfree(sd);

}



static int sharp_ls_power_on(struct omap_dss_device *dssdev)