dts: add device tree for STM32MP157C-ED1 board

Add minimal devicetree for STM32MP157C-ED1 board,
with only the devices to allow boot from SDCARD:
- RCC for clock and reset
- UART4 for console
- I2C and PMIC
- DDR
- SDMMC0 for SDCard

Waiting Kernel upstream for alignment.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>

1 files changed, 167 insertions, 0 deletions

diff --git a/arch/arm/dts/stm32mp157c-ed1.dts b/arch/arm/dts/stm32mp157c-ed1.dts
new file mode 100644
index 0000000000..4b20fabb71
--- /dev/null
+++ b/arch/arm/dts/stm32mp157c-ed1.dts
@@ -0,0 +1,167 @@
+/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */
+/*
+ * Copyright (C) STMicroelectronics 2017 - All Rights Reserved
+ * Author: Ludovic Barre <ludovic.barre@st.com> for STMicroelectronics.
+ */
+
+/dts-v1/;
+
+#include "stm32mp157.dtsi"
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/pinctrl/stm32-pinfunc.h>
+
+/ {
+	model = "STMicroelectronics STM32MP157C pmic eval daughter";
+	compatible = "st,stm32mp157c-ed1", "st,stm32mp157";
+
+	chosen {
+		bootargs = "earlyprintk console=ttyS3,115200 root=/dev/ram";
+		stdout-path = "serial3:115200n8";
+	};
+
+	memory {
+		reg = <0xC0000000 0x40000000>;
+	};
+};
+
+&gpioa {
+	status = "okay";
+};
+
+&gpiob {
+	status = "okay";
+};
+
+&gpioc {
+	status = "okay";
+};
+
+&gpiod {
+	status = "okay";
+};
+
+&gpioe {
+	status = "okay";
+};
+
+&gpiof {
+	status = "okay";
+};
+
+&gpiog {
+	status = "okay";
+};
+
+&gpioh {
+	status = "okay";
+};
+
+&gpioi {
+	status = "okay";
+};
+
+&gpioj {
+	status = "okay";
+};
+
+&gpiok {
+	status = "okay";
+};
+
+&gpioz {
+	status = "okay";
+};
+
+&pinctrl {
+	uart4_pins_a: uart4@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;
+		};
+	};
+
+	sdmmc1_b4_pins_a: sdmmc1-b4@0 {
+		pins {
+			pinmux = <STM32_PINMUX('C', 8, AF12)>, /* SDMMC1_D0 */
+				 <STM32_PINMUX('C', 9, AF12)>, /* SDMMC1_D1 */
+				 <STM32_PINMUX('C', 10, AF12)>, /* SDMMC1_D2 */
+				 <STM32_PINMUX('C', 11, AF12)>, /* SDMMC1_D3 */
+				 <STM32_PINMUX('C', 12, AF12)>, /* SDMMC1_CK */
+				 <STM32_PINMUX('D', 2, AF12)>; /* SDMMC1_CMD */
+			slew-rate = <3>;
+			drive-push-pull;
+			bias-disable;
+		};
+	};
+
+	sdmmc1_dir_pins_a: sdmmc1-dir@0 {
+		pins {
+			pinmux = <STM32_PINMUX('F', 2, AF11)>, /* SDMMC1_D0DIR */
+				 <STM32_PINMUX('C', 7, AF8)>, /* SDMMC1_D123DIR */
+				 <STM32_PINMUX('B', 9, AF11)>, /* SDMMC1_CDIR */
+				 <STM32_PINMUX('E', 4, AF8)>; /* SDMMC1_CKIN */
+			slew-rate = <3>;
+			drive-push-pull;
+			bias-pull-up;
+		};
+	};
+};
+
+&pinctrl_z {
+	i2c4_pins_a: i2c4@0 {
+		pins {
+			pinmux = <STM32_PINMUX('Z', 4, AF6)>, /* I2C4_SCL */
+				 <STM32_PINMUX('Z', 5, AF6)>; /* I2C4_SDA */
+			bias-disable;
+			drive-open-drain;
+			slew-rate = <0>;
+		};
+	};
+};
+
+&i2c4 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c4_pins_a>;
+	i2c-scl-rising-time-ns = <185>;
+	i2c-scl-falling-time-ns = <20>;
+	status = "okay";
+
+	pmic: stpmu1@33 {
+		compatible = "st,stpmu1";
+		reg = <0x33>;
+		interrupts = <0 2>;
+		interrupt-parent = <&gpioa>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+		status = "okay";
+	};
+};
+
+&sdmmc1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&sdmmc1_b4_pins_a &sdmmc1_dir_pins_a>;
+	broken-cd;
+	st,dirpol;
+	st,negedge;
+	st,pin-ckin;
+	bus-width = <4>;
+	sd-uhs-sdr12;
+	sd-uhs-sdr25;
+	sd-uhs-sdr50;
+	sd-uhs-ddr50;
+	sd-uhs-sdr104;
+	status = "okay";
+};
+
+&uart4 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart4_pins_a>;
+	status = "okay";
+};