This patch provides support for LCD backlight enable and disable for OMAP3 EVM using TPS6235x based PR785 boards.
Signed-off-by: Manikandan Pillai <[email protected]> --- 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 [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
