ARM: dts: stm32: Synchronize DT with kernel one

This patch synchronizes U-boot DT with kernel one
This is based on https://patchwork.kernel.org/cover/10797115/

This patch adds initial support of STM32MP157 discovery boards:
  - Add support of stm32mp157a discovery1 board (part number: STM32MP157A-DK1).
    This board embeds a STM32MP157a SOC with AC package (TFBGA361, 148 ios)
    and 512MB of DDR3. Several connections are available on this boards:
    4*USB2.0, 1*USB2.0 typeC, SDcard, RJ45, HDMI, Arduino connector, ...

  - Add support of stm32mp157c discovery2 board (part number: STM32MP157C-DK2).
    This board is a "super-set" of stm32mp157a-dk1. A display panel (otm8009a)
    and Murata wifi/BT combo is added.

Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>

1 files changed, 67 insertions, 0 deletions

diff --git a/arch/arm/dts/stm32mp157c-dk2.dts b/arch/arm/dts/stm32mp157c-dk2.dts
new file mode 100644
index 0000000000..9a81d2d472
--- /dev/null
+++ b/arch/arm/dts/stm32mp157c-dk2.dts
@@ -0,0 +1,67 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/*
+ * Copyright (C) STMicroelectronics 2019 - All Rights Reserved
+ * Author: Alexandre Torgue <alexandre.torgue@st.com> for STMicroelectronics.
+ */
+
+/dts-v1/;
+
+#include "stm32mp157a-dk1.dts"
+
+/ {
+	model = "STMicroelectronics STM32MP157C-DK2 Discovery Board";
+	compatible = "st,stm32mp157c-dk2", "st,stm32mp157";
+};
+
+&dsi {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+	phy-dsi-supply = <&reg18>;
+
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port@0 {
+			reg = <0>;
+			dsi_in: endpoint {
+				remote-endpoint = <&ltdc_ep1_out>;
+			};
+		};
+
+		port@1 {
+			reg = <1>;
+			dsi_out: endpoint {
+				remote-endpoint = <&panel_in>;
+			};
+		};
+	};
+
+	panel@0 {
+		compatible = "orisetech,otm8009a";
+		reg = <0>;
+		reset-gpios = <&gpioe 4 GPIO_ACTIVE_LOW>;
+		status = "okay";
+
+		port {
+			panel_in: endpoint {
+				remote-endpoint = <&dsi_out>;
+			};
+		};
+	};
+};
+
+&ltdc {
+	status = "okay";
+
+	port {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		ltdc_ep1_out: endpoint@1 {
+			reg = <1>;
+			remote-endpoint = <&dsi_in>;
+		};
+	};
+};