ARM: dts: stm32: support display on stm32f746-disco board

Add support to Rocktech RK043FN48H display on stm32f746-disco board.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Reviewed-by: Raphaël Gallais-Pou <raphael.gallais-pou@foss.st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>

diff --git a/arch/arm/boot/dts/st/stm32f746-disco.dts b/arch/arm/boot/dts/st/stm32f746-disco.dts
index 960aed12aa9ec614c48f791e1dd5f53ca8f60673..37e3a905fc3c51cd01622b75bbd82d5b431e595e 100644 (file)
--- a/arch/arm/boot/dts/st/stm32f746-disco.dts
+++ b/arch/arm/boot/dts/st/stm32f746-disco.dts
@@ -61,6 +61,19 @@
                reg = <0xC0000000 0x800000>;
        };
 
+       reserved-memory {
+               #address-cells = <1>;
+               #size-cells = <1>;
+               ranges;
+
+               linux,cma {
+                       compatible = "shared-dma-pool";
+                       no-map;
+                       size = <0x80000>;
+                       linux,dma-default;
+               };
+       };
+
        aliases {
                serial0 = &usart1;
        };
@@ -86,6 +99,25 @@
                regulator-min-microvolt = <3300000>;
                regulator-max-microvolt = <3300000>;
        };
+
+       backlight: backlight {
+               compatible = "gpio-backlight";
+               gpios = <&gpiok 3 GPIO_ACTIVE_HIGH>;
+               status = "okay";
+       };
+
+       panel_rgb: panel-rgb {
+               compatible = "rocktech,rk043fn48h";
+               power-supply = <&vcc_3v3>;
+               backlight = <&backlight>;
+               enable-gpios = <&gpioi 12 GPIO_ACTIVE_HIGH>;
+               status = "okay";
+               port {
+                       panel_in_rgb: endpoint {
+                               remote-endpoint = <&ltdc_out_rgb>;
+                       };
+               };
+       };
 };
 
 &clk_hse {
@@ -116,6 +148,18 @@
        };
 };
 
+&ltdc {
+       pinctrl-0 = <&ltdc_pins_a>;
+       pinctrl-names = "default";
+       status = "okay";
+
+       port {
+               ltdc_out_rgb: endpoint {
+                       remote-endpoint = <&panel_in_rgb>;
+               };
+       };
+};
+
 &sdio1 {
        status = "okay";
        vmmc-supply = <&vcc_3v3>;