arm: dts: stm32: add display for STM32F746 disco board

Enable the display controller, panel & backlight.
Set panel display timings & set the RGB data bus.

Signed-off-by: yannick fertre <yannick.fertre@st.com>

diff --git a/arch/arm/dts/stm32f746-disco.dts b/arch/arm/dts/stm32f746-disco.dts
index 9e8d2a045c327f1ecb8910a791b2592018c19bbc..e47f762e54dce20adca8f7f077e11ff61998e0fb 100644 (file)
--- a/arch/arm/dts/stm32f746-disco.dts
+++ b/arch/arm/dts/stm32f746-disco.dts
@@ -89,6 +89,37 @@
                compatible = "st,button1";
                button-gpio = <&gpioi 11 0>;
        };
+
+       backlight: backlight {
+               compatible = "gpio-backlight";
+               gpios = <&gpiok 3 0>;
+               status = "okay";
+       };
+
+       panel-rgb@0 {
+               compatible = "simple-panel";
+               backlight = <&backlight>;
+               enable-gpios = <&gpioi 12 0>;
+               status = "okay";
+
+               display-timings {
+                       timing@0 {
+                               clock-frequency = <9000000>;
+                               hactive = <480>;
+                               vactive = <272>;
+                               hfront-porch = <2>;
+                               hback-porch = <2>;
+                               hsync-len = <41>;
+                               vfront-porch = <2>;
+                               vback-porch = <2>;
+                               vsync-len = <10>;
+                               hsync-active = <0>;
+                               vsync-active = <0>;
+                               de-active = <0>;
+                               pixelclk-active = <1>;
+                       };
+               };
+       };
 };
 
 &clk_hse {
@@ -183,6 +214,40 @@
                          slew-rate = <2>;
                };
        };
+
+       ltdc_pins: ltdc@0 {
+               pins {
+                       pinmux = <STM32F746_PE4_FUNC_LCD_B0>,
+                              <STM32F746_PG12_FUNC_LCD_B4>,
+                              <STM32F746_PI9_FUNC_LCD_VSYNC>,
+                              <STM32F746_PI10_FUNC_LCD_HSYNC>,
+                              <STM32F746_PI14_FUNC_LCD_CLK>,
+                              <STM32F746_PI15_FUNC_LCD_R0>,
+                              <STM32F746_PJ0_FUNC_LCD_R1>,
+                              <STM32F746_PJ1_FUNC_LCD_R2>,
+                              <STM32F746_PJ2_FUNC_LCD_R3>,
+                              <STM32F746_PJ3_FUNC_LCD_R4>,
+                              <STM32F746_PJ4_FUNC_LCD_R5>,
+                              <STM32F746_PJ5_FUNC_LCD_R6>,
+                              <STM32F746_PJ6_FUNC_LCD_R7>,
+                              <STM32F746_PJ7_FUNC_LCD_G0>,
+                              <STM32F746_PJ8_FUNC_LCD_G1>,
+                              <STM32F746_PJ9_FUNC_LCD_G2>,
+                              <STM32F746_PJ10_FUNC_LCD_G3>,
+                              <STM32F746_PJ11_FUNC_LCD_G4>,
+                              <STM32F746_PJ13_FUNC_LCD_B1>,
+                              <STM32F746_PJ14_FUNC_LCD_B2>,
+                              <STM32F746_PJ15_FUNC_LCD_B3>,
+                              <STM32F746_PK0_FUNC_LCD_G5>,
+                              <STM32F746_PK1_FUNC_LCD_G6>,
+                              <STM32F746_PK2_FUNC_LCD_G7>,
+                              <STM32F746_PK4_FUNC_LCD_B5>,
+                              <STM32F746_PK5_FUNC_LCD_B6>,
+                              <STM32F746_PK6_FUNC_LCD_B7>,
+                              <STM32F746_PK7_FUNC_LCD_DE>;
+                       slew-rate = <2>;
+               };
+       };
 };
 
 &usart1 {
@@ -250,3 +315,8 @@
        bus-width = <4>;
        max-frequency = <25000000>;
 };
+
+&ltdc {
+       status = "okay";
+       pinctrl-0 = <&ltdc_pins>;
+};