ARM: dts: stm32: Add support for the emtrion emSBC-Argon

This patch presents the DT patches for the emtrion GmbH
Argon board series. They are available with STM32MP157
from STMicroelectronics with 512 MByte Memory.

The devicetree stm32mp157c-emstamp-argon.dtsi is the common part
providing the module components and the basic support for the SoC.
The support for the emSBC-Argon baseboard in the developer-kit
configuration is provided by the stm32mp157c-emsbc-argon.dts file.
Signed-off-by: Reinhold Mueller <reinhold.mueller@emtrion.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>

arch/arm/boot/dts/Makefile

@@ -1161,6 +1161,7 @@ dtb-$(CONFIG_ARCH_STM32) += \
 	stm32mp157c-dhcom-picoitx.dtb \
 	stm32mp157c-dk2.dtb \
 	stm32mp157c-ed1.dtb \
+	stm32mp157c-emsbc-argon.dtb \
 	stm32mp157c-ev1.dtb \
 	stm32mp157c-lxa-mc1.dtb \
 	stm32mp157c-odyssey.dtb

arch/arm/boot/dts/stm32mp15-pinctrl.dtsi

@@ -338,6 +338,47 @@ pins1 {
 		};
 	};
 
+	ethernet0_rmii_pins_b: rmii-1 {
+		pins1 {
+			pinmux = <STM32_PINMUX('B', 5, AF0)>, /* ETH1_CLK */
+				<STM32_PINMUX('C', 1, AF11)>, /* ETH1_MDC */
+				<STM32_PINMUX('G', 13, AF11)>, /* ETH1_TXD0 */
+				<STM32_PINMUX('G', 14, AF11)>; /* ETH1_TXD1 */
+			bias-disable;
+			drive-push-pull;
+			slew-rate = <1>;
+		};
+		pins2 {
+			pinmux = <STM32_PINMUX('A', 2, AF11)>; /* ETH1_MDIO */
+			bias-disable;
+			drive-push-pull;
+			slew-rate = <0>;
+		};
+		pins3 {
+			pinmux = <STM32_PINMUX('A', 7, AF11)>, /* ETH1_CRS_DV */
+				<STM32_PINMUX('C', 4, AF11)>, /* ETH1_RXD0 */
+				<STM32_PINMUX('C', 5, AF11)>; /* ETH1_RXD1 */
+			bias-disable;
+		};
+		pins4 {
+			pinmux = <STM32_PINMUX('B', 11, AF11)>; /* ETH1_TX_EN */
+		};
+	};
+
+	ethernet0_rmii_sleep_pins_b: rmii-sleep-1 {
+		pins1 {
+			pinmux = <STM32_PINMUX('A', 2, ANALOG)>, /* ETH1_MDIO */
+				<STM32_PINMUX('A', 7, ANALOG)>, /* ETH1_CRS_DV */
+				<STM32_PINMUX('B', 5, ANALOG)>, /* ETH1_CLK */
+				<STM32_PINMUX('B', 11, ANALOG)>, /* ETH1_TX_EN */
+				<STM32_PINMUX('C', 1, ANALOG)>, /* ETH1_MDC */
+				<STM32_PINMUX('C', 4, ANALOG)>, /* ETH1_RXD0 */
+				<STM32_PINMUX('C', 5, ANALOG)>, /* ETH1_RXD1 */
+				<STM32_PINMUX('G', 13, ANALOG)>, /* ETH1_TXD0 */
+				<STM32_PINMUX('G', 14, ANALOG)>; /* ETH1_TXD1 */
+		};
+	};
+
 	fmc_pins_a: fmc-0 {
 		pins1 {
 			pinmux = <STM32_PINMUX('D', 4, AF12)>, /* FMC_NOE */
@@ -927,6 +968,21 @@ pins {
 		};
 	};
 
+	pwm1_pins_b: pwm1-1 {
+		pins {
+			pinmux = <STM32_PINMUX('E', 9, AF1)>; /* TIM1_CH1 */
+			bias-pull-down;
+			drive-push-pull;
+			slew-rate = <0>;
+		};
+	};
+
+	pwm1_sleep_pins_b: pwm1-sleep-1 {
+		pins {
+			pinmux = <STM32_PINMUX('E', 9, ANALOG)>; /* TIM1_CH1 */
+		};
+	};
+
 	pwm2_pins_a: pwm2-0 {
 		pins {
 			pinmux = <STM32_PINMUX('A', 3, AF1)>; /* TIM2_CH4 */
@@ -2042,6 +2098,42 @@ pins {
 		};
 	};
 
+	usart3_pins_d: usart3-3 {
+		pins1 {
+			pinmux = <STM32_PINMUX('B', 10, AF7)>, /* USART3_TX */
+				 <STM32_PINMUX('G', 8, AF8)>; /* USART3_RTS */
+			bias-disable;
+			drive-push-pull;
+			slew-rate = <0>;
+		};
+		pins2 {
+			pinmux = <STM32_PINMUX('D', 9, AF7)>, /* USART3_RX */
+				 <STM32_PINMUX('D', 11, AF7)>; /* USART3_CTS_NSS */
+			bias-disable;
+		};
+	};
+
+	usart3_idle_pins_d: usart3-idle-3 {
+		pins1 {
+			pinmux = <STM32_PINMUX('B', 10, ANALOG)>, /* USART3_TX */
+				 <STM32_PINMUX('G', 8, ANALOG)>, /* USART3_RTS */
+				 <STM32_PINMUX('D', 11, ANALOG)>; /* USART3_CTS_NSS */
+		};
+		pins2 {
+			pinmux = <STM32_PINMUX('D', 9, AF7)>; /* USART3_RX */
+			bias-disable;
+		};
+	};
+
+	usart3_sleep_pins_d: usart3-sleep-3 {
+		pins {
+			pinmux = <STM32_PINMUX('B', 10, ANALOG)>, /* USART3_TX */
+				 <STM32_PINMUX('G', 8, ANALOG)>, /* USART3_RTS */
+				 <STM32_PINMUX('D', 11, ANALOG)>, /* USART3_CTS_NSS */
+				 <STM32_PINMUX('D', 9, ANALOG)>; /* USART3_RX */
+		};
+	};
+
 	usbotg_hs_pins_a: usbotg-hs-0 {
 		pins {
 			pinmux = <STM32_PINMUX('A', 10, ANALOG)>; /* OTG_ID */

arch/arm/boot/dts/stm32mp157c-emsbc-argon.dts

+// SPDX-License-Identifier: (GPL-2.0 or MIT)
+//
+// Copyright (c) 2021 emtrion GmbH
+// Author: Reinhold Müller <reinhold.mueller@emtrion.de>.
+//
+
+/dts-v1/;
+
+#include "stm32mp157c-emstamp-argon.dtsi"
+
+/ {
+	model = "emtrion STM32MP157C emSBC-Argon Developer Board";
+	compatible = "emtrion,stm32mp157c-emsbc-argon", "emtrion,stm32mp157c-emstamp-argon",
+			"st,stm32mp157";
+
+	led: gpio_leds {
+		compatible = "gpio-leds";
+		led-2 {
+			label = "red";
+			gpios = <&gpiof 12 GPIO_ACTIVE_LOW>;
+			linux,default-trigger = "none";
+			default-state = "off";
+		};
+		led-3 {
+			label = "green";
+			gpios = <&gpioe 7 GPIO_ACTIVE_LOW>;
+			linux,default-trigger = "none";
+			default-state = "off";
+		};
+	};
+};
+
+&dac {
+	status = "okay";
+};
+
+&sdmmc1 {
+	pinctrl-names = "default", "opendrain", "sleep";
+	pinctrl-0 = <&sdmmc1_b4_pins_a>;
+	pinctrl-1 = <&sdmmc1_b4_od_pins_a>;
+	pinctrl-2 = <&sdmmc1_b4_sleep_pins_a>;
+	cd-gpios = <&gpiob 7 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+	disable-wp;
+	st,neg-edge;
+	bus-width = <4>;
+	vmmc-supply = <&vdd_sd>;
+	status = "okay";
+};
+
+&spi1 {
+	status = "okay";
+};
+