On some board gpio to power LCD can be active low, so let's add CONFIG_VIDEO_LCD_POWER_ACTIVE_LOW to allow this.
Signed-off-by: Giulio Benetti giulio.benetti@benettiengineering.com --- arch/arm/mach-sunxi/Kconfig | 7 +++++++ drivers/video/sunxi/sunxi_display.c | 4 ++++ 2 files changed, 11 insertions(+)
diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig index dbe6005daa..a7375b53a6 100644 --- a/arch/arm/mach-sunxi/Kconfig +++ b/arch/arm/mach-sunxi/Kconfig @@ -867,6 +867,13 @@ config VIDEO_LCD_POWER Set the power enable pin for the LCD panel. This takes a string in the format understood by sunxi_name_to_gpio, e.g. PH1 for pin 1 of port H.
+config VIDEO_LCD_POWER_ACTIVE_LOW + bool "LCD panel power enable pin is inverted" + depends on VIDEO_SUNXI + default n + ---help--- + Set this if the lcd power pin is active low. + config VIDEO_LCD_RESET string "LCD panel reset pin" depends on VIDEO_SUNXI diff --git a/drivers/video/sunxi/sunxi_display.c b/drivers/video/sunxi/sunxi_display.c index 2ee6212c58..12b542d65b 100644 --- a/drivers/video/sunxi/sunxi_display.c +++ b/drivers/video/sunxi/sunxi_display.c @@ -588,7 +588,11 @@ static void sunxi_lcdc_panel_enable(void) pin = sunxi_name_to_gpio(CONFIG_VIDEO_LCD_POWER); if (pin >= 0) { gpio_request(pin, "lcd_power"); +#ifdef CONFIG_VIDEO_LCD_POWER_ACTIVE_LOW + gpio_direction_output(pin, 0); +#else gpio_direction_output(pin, 1); +#endif }
if (reset_pin >= 0)