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

Janorkar, Mayuresh
2010-11-30T13:10:05Z

> -----Original Message-----
> From: linux-omap-owner@vger.kernel.org [mailto:linux-omap-
> owner@vger.kernel.org] On Behalf Of Bryan Wu
> Sent: Tuesday, November 30, 2010 5:38 PM
> To: tomi.valkeinen@nokia.com; linux-omap@vger.kernel.org; linux-arm-
> kernel@lists.infradead.org; Gadiyar, Anand; rpurdie@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@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@canonical.com>
> + *
> + * 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/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@canonical.com>");
> +MODULE_LICENSE("GPL");
> +MODULE_ALIAS("platform:sharp-ls-bl");
> --
> 1.7.1
>
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