[PATCH 1/3] Backlight: driver for Sharp LS037V7DW01 panel on OMAP machine

[Janorkar, Mayuresh]

> -----Original Message-----
> From: linux-omap-owner at vger.kernel.org [mailto:linux-omap-
> owner at vger.kernel.org] On Behalf Of Bryan Wu
> Sent: Tuesday, November 30, 2010 5:38 PM
> To: tomi.valkeinen at nokia.com; linux-omap at vger.kernel.org; linux-arm-
> kernel at lists.infradead.org; Gadiyar, Anand; rpurdie at rpsys.net
> Subject: [PATCH 1/3] Backlight: driver for Sharp LS037V7DW01 panel on OMAP
> machine
> 
> This driver is split from drivers/video/backlight/sharp_ls037v7dw01.c
> 
> Signed-off-by: Bryan Wu <bryan.wu at canonical.com>
> ---
>  drivers/video/backlight/Kconfig             |   10 ++
>  drivers/video/backlight/Makefile            |    1 +
>  drivers/video/backlight/sharp_ls037v7dw01.c |  144
> +++++++++++++++++++++++++++
>  3 files changed, 155 insertions(+), 0 deletions(-)
>  create mode 100644 drivers/video/backlight/sharp_ls037v7dw01.c
> 
> diff --git a/drivers/video/backlight/Kconfig
> b/drivers/video/backlight/Kconfig
> index e54a337..46b2415 100644
> --- a/drivers/video/backlight/Kconfig
> +++ b/drivers/video/backlight/Kconfig
> @@ -307,6 +307,16 @@ config BACKLIGHT_PCF50633
>  	  If you have a backlight driven by a NXP PCF50633 MFD, say Y here
> to
>  	  enable its driver.
> 
> +config BACKLIGHT_SHARP_LS037V7DW01
> +	tristate "Backlight driver for SHARP LS037V7DW01 Panel"
> +	depends on PANEL_GENERIC_DPI
> +	help
> +	  If you are using Sharp LS037V7DW01 LCD panel, say Y here to enable
> this driver.
> +
> +	  To compile this driver as a module, choose M here: the module will
> +	  be called sharp_ls037v7dw01.
> +
> +
[Mayuresh]: Please do not introduce extra new lines.
>  endif # BACKLIGHT_CLASS_DEVICE
> 
>  endif # BACKLIGHT_LCD_SUPPORT
> diff --git a/drivers/video/backlight/Makefile
> b/drivers/video/backlight/Makefile
> index 44c0f81..c756f49 100644
> --- a/drivers/video/backlight/Makefile
> +++ b/drivers/video/backlight/Makefile
> @@ -35,4 +35,5 @@ obj-$(CONFIG_BACKLIGHT_ADP5520)	+= adp5520_bl.o
>  obj-$(CONFIG_BACKLIGHT_ADP8860)	+= adp8860_bl.o
>  obj-$(CONFIG_BACKLIGHT_88PM860X) += 88pm860x_bl.o
>  obj-$(CONFIG_BACKLIGHT_PCF50633)	+= pcf50633-backlight.o
> +obj-$(CONFIG_BACKLIGHT_SHARP_LS037V7DW01)	+= sharp_ls037v7dw01.o
> 
> diff --git a/drivers/video/backlight/sharp_ls037v7dw01.c
> b/drivers/video/backlight/sharp_ls037v7dw01.c
> new file mode 100644
> index 0000000..e90595e
> --- /dev/null
> +++ b/drivers/video/backlight/sharp_ls037v7dw01.c
> @@ -0,0 +1,144 @@
> +/*
> + * Backlight driver for Sharp LS037V7DW01
> + *
> + * Copyright (C) 2010 Canonical Ltd.
> + * Author: Bryan Wu <bryan.wu at canonical.com>
> + *
> + * Copyright (C) 2008 Nokia Corporation
> + * Author: Tomi Valkeinen <tomi.valkeinen at 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/device.h>
> +#include <linux/backlight.h>
> +#include <linux/fb.h>
> +#include <linux/err.h>
> +
> +/* This OMAP platform header file is required by this driver */
> +#include <plat/display.h>
> +
> +static int sharp_ls_bl_update_status(struct backlight_device *bl)
> +{
> +	struct omap_dss_device *dssdev = bl_get_data(bl);
> +	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 __devinit sharp_ls_bl_probe(struct platform_device *pdev)
> +{
> +	struct backlight_properties props;
> +	struct backlight_device *bl;
> +	struct omap_dss_device *dssdev = pdev->dev.platform_data;
> +
> +	if (!dssdev)
> +		return -EINVAL;
> +
> +	memset(&props, 0, sizeof(struct backlight_properties));
> +	props.max_brightness = dssdev->max_backlight_level;
> +
> +	bl = backlight_device_register("sharp-ls-bl", &dssdev->dev, dssdev,
> +			&sharp_ls_bl_ops, &props);
> +	if (IS_ERR(bl))
> +		return PTR_ERR(bl);
> +
> +	bl->props.fb_blank = FB_BLANK_UNBLANK;
> +	bl->props.power = FB_BLANK_UNBLANK;
> +	bl->props.brightness = dssdev->max_backlight_level;
> +	backlight_update_status(bl);
> +
> +	platform_set_drvdata(pdev, bl);
> +	return 0;
> +}
> +
> +static int __devexit sharp_ls_bl_remove(struct platform_device *pdev)
> +{
> +	struct backlight_device *bl = platform_get_drvdata(pdev);
> +
> +	bl->props.power = FB_BLANK_POWERDOWN;
> +	backlight_update_status(bl);
> +	backlight_device_unregister(bl);
> +
> +	return 0;
> +}
> +
> +#ifdef CONFIG_PM
> +static int sharp_ls_bl_suspend(struct platform_device *dev, pm_message_t
> state)
> +{
> +	return 0;
> +}
> +
> +static int sharp_ls_bl_resume(struct platform_device *dev)
> +{
> +	struct backlight_device *bl = platform_get_drvdata(dev);
> +
> +	backlight_update_status(bl);
> +	return 0;
> +}
> +#else
> +#define sharp_ls_bl_suspend	NULL
> +#define sharp_ls_bl_resume	NULL
> +#endif
> +
> +static struct platform_driver sharp_ls_bl_driver = {
> +	.driver		= {
> +		.name	= "sharp-ls-bl",
> +		.owner	= THIS_MODULE,
> +	},
> +	.probe		= sharp_ls_bl_probe,
> +	.remove		= __devexit_p(sharp_ls_bl_remove),
> +	.suspend	= sharp_ls_bl_suspend,
> +	.resume		= sharp_ls_bl_resume,
> +};
> +
> +static int __init sharp_ls_bl_init(void)
> +{
> +	return platform_driver_register(&sharp_ls_bl_driver);
> +}
> +module_init(sharp_ls_bl_init);
> +
> +static void __exit sharp_ls_bl_exit(void)
> +{
> +	platform_driver_unregister(&sharp_ls_bl_driver);
> +}
> +module_exit(sharp_ls_bl_exit);
> +
> +MODULE_DESCRIPTION("Sharp LS037V7DW01 Backlight Driver");
> +MODULE_AUTHOR("Bryan Wu <bryan.wu at canonical.com>");
> +MODULE_LICENSE("GPL");
> +MODULE_ALIAS("platform:sharp-ls-bl");
> --
> 1.7.1
> 
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