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| author | Hans de Goede <hdegoede@redhat.com> | 2015-02-16 16:26:41 (GMT) |
|---|---|---|
| committer | Hans de Goede <hdegoede@redhat.com> | 2015-02-20 07:11:57 (GMT) |
| commit | 242e3d893d1311ea38abd25613076a29961d422e (patch) | |
| tree | 6791d4ae57f678b0dafce3f3190ce332fe2f11b6 | |
| parent | 1320112c8aa58345d71a5a46f3bf6a52589f1f2b (diff) | |
| download | u-boot-242e3d893d1311ea38abd25613076a29961d422e.tar.xz | |
sunxi: video: Add support for LCD reset pin
On some boards there is a gpio to reset the LCD panel, add support for this.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
| -rw-r--r-- | board/sunxi/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/video/sunxi_display.c | 11 |
2 files changed, 18 insertions, 1 deletions
diff --git a/board/sunxi/Kconfig b/board/sunxi/Kconfig index 3eab81f..a170c56 100644 --- a/board/sunxi/Kconfig +++ b/board/sunxi/Kconfig @@ -312,6 +312,14 @@ 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_RESET + string "LCD panel reset pin" + depends on VIDEO + default "" + ---help--- + Set the reset 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_BL_EN string "LCD panel backlight enable pin" depends on VIDEO diff --git a/drivers/video/sunxi_display.c b/drivers/video/sunxi_display.c index dbda97e..7f01401 100644 --- a/drivers/video/sunxi_display.c +++ b/drivers/video/sunxi_display.c @@ -592,7 +592,7 @@ static void sunxi_lcdc_enable(void) static void sunxi_lcdc_panel_enable(void) { - int pin; + int pin, reset_pin; /* * Start with backlight disabled to avoid the screen flashing to @@ -610,6 +610,12 @@ static void sunxi_lcdc_panel_enable(void) gpio_direction_output(pin, PWM_OFF); } + reset_pin = sunxi_name_to_gpio(CONFIG_VIDEO_LCD_RESET); + if (reset_pin != -1) { + gpio_request(reset_pin, "lcd_reset"); + gpio_direction_output(reset_pin, 0); /* Assert reset */ + } + /* Give the backlight some time to turn off and power up the panel. */ mdelay(40); pin = sunxi_name_to_gpio(CONFIG_VIDEO_LCD_POWER); @@ -617,6 +623,9 @@ static void sunxi_lcdc_panel_enable(void) gpio_request(pin, "lcd_power"); gpio_direction_output(pin, 1); } + + if (reset_pin != -1) + gpio_direction_output(reset_pin, 1); /* De-assert reset */ } static void sunxi_lcdc_backlight_enable(void) |