Hi, For OMAP we do not have the backlight class support. That's the reason I am hooking the LCD control to the existing framework which is available in lcd_omap3evm.c. The sys fs interface is also provided and can be controlled by writing to /sys/devices/platform/omapfb/panel/backlight_level. Regards Mani -----Original Message----- From: Koen Kooi [mailto:k.kooi@xxxxxxxxxxxxxxxxxx] Sent: Thursday, December 18, 2008 2:47 PM To: Pillai, Manikandan Cc: linux-omap@xxxxxxxxxxxxxxx; broonie@xxxxxxxxxxxxx Subject: Re: [PATCH 1/1] LCD backlight support for OMAP3 EVM using TPS6235x based power module Op 18 dec 2008, om 05:06 heeft Manikandan Pillai het volgende geschreven: > This patch provides support for LCD backlight enable and disable > for OMAP3 EVM using TPS6235x based PR785 boards. Could you hook into the backlight class for this please? regards, Koen > > > Signed-off-by: Manikandan Pillai <mani.pillai@xxxxxx> > --- > drivers/video/omap/lcd_omap3evm.c | 22 +++++++++++++++++++++- > 1 files changed, 21 insertions(+), 1 deletions(-) > > diff --git a/drivers/video/omap/lcd_omap3evm.c b/drivers/video/omap/ > lcd_omap3evm.c > index 4f373b2..0ea35ba 100644 > --- a/drivers/video/omap/lcd_omap3evm.c > +++ b/drivers/video/omap/lcd_omap3evm.c > @@ -49,6 +49,9 @@ > #define TWL_PWMA_PWMAON 0x00 > #define TWL_PWMA_PWMAOFF 0x01 > > +/* GPIO on which Backlight can be switched ON/OFF */ > +#define LCD_OMAP3_BKLIGHT_GPIO 141 > + > static unsigned int bklight_level; > > static int omap3evm_panel_init(struct lcd_panel *panel, > @@ -71,6 +74,10 @@ static int omap3evm_panel_init(struct lcd_panel > *panel, > twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x01, TWL_PWMA_PWMAON); > twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x02, TWL_PWMA_PWMAOFF); > #endif > +#if defined(CONFIG_PR785) > + gpio_request(LCD_OMAP3_BKLIGHT_GPIO, "AE6_34XX_GPIO141"); > +#endif > + > bklight_level = 100; > > return 0; > @@ -108,7 +115,20 @@ static int omap3evm_bklight_setlevel(struct > lcd_panel *panel, > } > return 0; > #endif > - /* Fix this once patch fix is sent out for TPS-boards */ > + > +#if defined(CONFIG_OMAP3EVM_PR785) > + bklight_level = level; > + /* if it is PR785 card the backlight can only be enabled or disable > + we will use values <=15 for disable and rest as enabled */ > + if (level <= 15) > + /* Switch of the backlight for level values <=10 */ > + gpio_direction_output(LCD_OMAP3_BKLIGHT_GPIO, 0); > + else > + gpio_direction_output(LCD_OMAP3_BKLIGHT_GPIO, 1); > + > + return 0; > +#endif > + /* if neither of them is defined, it's an error */ > return -1; > } > > -- > 1.5.6 > > -- > To unsubscribe from this list: send the line "unsubscribe linux- > omap" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
