[PATCH 6/6] ARM: dts: stm32: add initial support of stm32mp157c eval board

[Ludovic Barre]

From: Ludovic Barre <ludovic.barre at st.com>

Add support of stm32mp157c evaluation board (part number: STM32MP157C-EV1)
split in 2 elements:
-Daughter board (part number: STM32MP157C-ED1)
 which includes CPU, memory and power supply
-Mother board (part number: STM32MP157C-EM1)
 which includes external peripherals (like display, camera,...)
 and extension connectors.

The daughter board can run alone, this is why the device tree files
are split in two layers, for the complete evaluation board (ev1)
and for the daughter board alone (ed1).

Signed-off-by: Ludovic Barre <ludovic.barre at st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue at st.com>
---
 arch/arm/boot/dts/Makefile                |  5 ++++-
 arch/arm/boot/dts/stm32mp157-pinctrl.dtsi | 13 +++++++++++++
 arch/arm/boot/dts/stm32mp157c-ed1.dts     | 29 +++++++++++++++++++++++++++++
 arch/arm/boot/dts/stm32mp157c-ev1.dts     | 19 +++++++++++++++++++
 4 files changed, 65 insertions(+), 1 deletion(-)
 create mode 100644 arch/arm/boot/dts/stm32mp157c-ed1.dts
 create mode 100644 arch/arm/boot/dts/stm32mp157c-ev1.dts

diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index d0381e9..ddfa3b3 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -839,7 +839,7 @@ dtb-$(CONFIG_ARCH_STI) += \
 	stih410-b2120.dtb \
 	stih410-b2260.dtb \
 	stih418-b2199.dtb
-dtb-$(CONFIG_ARCH_STM32)+= \
+dtb-$(CONFIG_ARCH_STM32_MCU) += \
 	stm32f429-disco.dtb \
 	stm32f469-disco.dtb \
 	stm32f746-disco.dtb \
@@ -848,6 +848,9 @@ dtb-$(CONFIG_ARCH_STM32)+= \
 	stm32746g-eval.dtb \
 	stm32h743i-eval.dtb \
 	stm32h743i-disco.dtb
+dtb-$(CONFIG_ARCH_STM32_MPU) += \
+	stm32mp157c-ed1.dtb \
+	stm32mp157c-ev1.dtb
 dtb-$(CONFIG_MACH_SUN4I) += \
 	sun4i-a10-a1000.dtb \
 	sun4i-a10-ba10-tvbox.dtb \
diff --git a/arch/arm/boot/dts/stm32mp157-pinctrl.dtsi b/arch/arm/boot/dts/stm32mp157-pinctrl.dtsi
index 440276a..7ac65f4 100644
--- a/arch/arm/boot/dts/stm32mp157-pinctrl.dtsi
+++ b/arch/arm/boot/dts/stm32mp157-pinctrl.dtsi
@@ -145,6 +145,19 @@
 				ngpios = <8>;
 				gpio-ranges = <&pinctrl 0 160 8>;
 			};
+
+			uart4_pins_a: uart4 at 0 {
+				pins1 {
+					pinmux = <STM32_PINMUX('G', 11, AF6)>; /* UART4_TX */
+					bias-disable;
+					drive-push-pull;
+					slew-rate = <0>;
+				};
+				pins2 {
+					pinmux = <STM32_PINMUX('B', 2, AF8)>; /* UART4_RX */
+					bias-disable;
+				};
+			};
 		};
 
 		pinctrl_z: pin-controller-z {
diff --git a/arch/arm/boot/dts/stm32mp157c-ed1.dts b/arch/arm/boot/dts/stm32mp157c-ed1.dts
new file mode 100644
index 0000000..f6a2618
--- /dev/null
+++ b/arch/arm/boot/dts/stm32mp157c-ed1.dts
@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */
+/*
+ * Copyright (C) STMicroelectronics 2017 - All Rights Reserved 
+ * Author: Ludovic Barre <ludovic.barre at st.com> for STMicroelectronics.
+ */
+/dts-v1/;
+
+#include "stm32mp157c.dtsi"
+#include "stm32mp157-pinctrl.dtsi"
+
+/ {
+	model = "STMicroelectronics STM32MP157C eval daughter";
+	compatible = "st,stm32mp157c-ed1", "st,stm32mp157";
+
+	chosen {
+		bootargs = "earlyprintk console=ttySTM3,115200 root=/dev/ram";
+		stdout-path = "serial3:115200n8";
+	};
+
+	memory {
+		reg = <0xC0000000 0x4000000>;
+	};
+};
+
+&uart4 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart4_pins_a>;
+	status = "okay";
+};
diff --git a/arch/arm/boot/dts/stm32mp157c-ev1.dts b/arch/arm/boot/dts/stm32mp157c-ev1.dts
new file mode 100644
index 0000000..a310703
--- /dev/null
+++ b/arch/arm/boot/dts/stm32mp157c-ev1.dts
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */
+/*
+ * Copyright (C) STMicroelectronics 2017 - All Rights Reserved 
+ * Author: Ludovic Barre <ludovic.barre at st.com> for STMicroelectronics.
+ */
+/dts-v1/;
+
+#include "stm32mp157c-ed1.dts"
+
+/ {
+	model = "STMicroelectronics STM32MP157C eval daughter on eval mother";
+	compatible = "st,stm32mp157c-ev1", "st,stm32mp157c-ed1", "st,stm32mp157";
+
+	chosen {
+		bootargs = "earlyprintk console=ttySTM3,115200 root=/dev/ram";
+		stdout-path = "serial3:115200n8";
+	};
+};
+
-- 
2.7.4