arm: boards: Add support for PRTT1x STM32MP151 based boards

- PRTT1A is a very simple 10Base-T1L Ethernet to 0-10V output converter
  module.
- PRTT1S is a CO2- and RH measurement module with 10Base-T1L and PoDL power
  sink.
- PRTT1C is a "white box switch" device, meant to control the other members
  of the PRTT1L family of devices, connected via 10Base-T1L and PoDL power.

Signed-off-by: David Jander <david@protonic.nl>
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://lore.barebox.org/20211118134125.408959-1-o.rempel@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

6 files changed, 278 insertions, 0 deletions

diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 88a079497a..552cca732f 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -94,6 +94,10 @@ lwl-$(CONFIG_MACH_PROTONIC_IMX6) += \
 	imx6ul-prti6g.dtb.o \
 	imx6ull-jozacp.dtb.o
 lwl-$(CONFIG_MACH_PROTONIC_IMX8M) += imx8mm-prt8mm.dtb.o
+lwl-$(CONFIG_MACH_PROTONIC_STM32MP1) += \
+	stm32mp151-prtt1a.dtb.o \
+	stm32mp151-prtt1c.dtb.o \
+	stm32mp151-prtt1s.dtb.o
 lwl-$(CONFIG_MACH_RADXA_ROCK) += rk3188-radxarock.dtb.o
 lwl-$(CONFIG_MACH_PHYTEC_SOM_RK3288) += rk3288-phycore-som.dtb.o
 lwl-$(CONFIG_MACH_REALQ7) += imx6q-dmo-edmqmx6.dtb.o
diff --git a/arch/arm/dts/stm32mp151-prtt1a.dts b/arch/arm/dts/stm32mp151-prtt1a.dts
new file mode 100644
index 0000000000..0f3c50f3e9
--- /dev/null
+++ b/arch/arm/dts/stm32mp151-prtt1a.dts
@@ -0,0 +1,20 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-3-Clause)
+// SPDX-FileCopyrightText: 2021 David Jander, Protonic Holland
+// SPDX-FileCopyrightText: 2021 Oleksij Rempel, Pengutronix
+/dts-v1/;
+
+#include "stm32mp151-prtt1l.dtsi"
+#include "stm32mp151-prtt1l-net.dtsi"
+
+/ {
+	model = "Protonic PRTT1A";
+	compatible = "prt,prtt1a", "st,stm32mp151";
+
+	chosen {
+		environment-sd {
+			compatible = "barebox,environment";
+			device-path = &sdmmc1, "partname:barebox-environment";
+			status = "disabled";
+		};
+	};
+};
diff --git a/arch/arm/dts/stm32mp151-prtt1c.dts b/arch/arm/dts/stm32mp151-prtt1c.dts
new file mode 100644
index 0000000000..fc411f9719
--- /dev/null
+++ b/arch/arm/dts/stm32mp151-prtt1c.dts
@@ -0,0 +1,89 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-3-Clause)
+// SPDX-FileCopyrightText: 2021 David Jander, Protonic Holland
+// SPDX-FileCopyrightText: 2021 Oleksij Rempel, Pengutronix
+/dts-v1/;
+
+#include "stm32mp151-prtt1l.dtsi"
+
+/ {
+	model = "Protonic PRTT1C";
+	compatible = "prt,prtt1c", "st,stm32mp151";
+
+	chosen {
+		environment-sd {
+			compatible = "barebox,environment";
+			device-path = &sdmmc1, "partname:barebox-environment";
+			status = "disabled";
+		};
+
+		environment-emmc {
+			compatible = "barebox,environment";
+			device-path = &sdmmc2, "partname:barebox-environment";
+			status = "disabled";
+		};
+	};
+};
+
+&ethernet0 {
+	pinctrl-0 = <&ethernet0_rmii_pins_a>;
+	pinctrl-names = "default";
+	phy-mode = "rmii";
+	phy-reset-gpios = <&gpioa 3 GPIO_ACTIVE_LOW>;
+	status = "okay";
+
+	fixed-link {
+		speed = <100>;
+		full-duplex;
+	};
+};
+
+&sdmmc2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&sdmmc2_b4_pins_a &sdmmc2_d47_pins_a>;
+	disable-wp;
+	disable-cd;
+	no-removable;
+	no-sd;
+	no-sdio;
+	no-1-8-v;
+	st,neg-edge;
+	bus-width = <8>;
+	vmmc-supply = <&v3v3>;
+	vqmmc-supply = <&v3v3>;
+	status = "okay";
+};
+
+&ethernet0_rmii_pins_a {
+	pins1 {
+		pinmux = <STM32_PINMUX('B', 12, AF11)>, /* ETH1_RMII_TXD0 */
+			 <STM32_PINMUX('B', 13, AF11)>, /* ETH1_RMII_TXD1 */
+			 <STM32_PINMUX('B', 11, AF11)>, /* ETH1_RMII_TX_EN */
+			 <STM32_PINMUX('A', 2, AF11)>,  /* ETH1_MDIO */
+			 <STM32_PINMUX('C', 1, AF11)>;  /* ETH1_MDC */
+	};
+	pins2 {
+		pinmux = <STM32_PINMUX('C', 4, AF11)>,  /* ETH1_RMII_RXD0 */
+			 <STM32_PINMUX('C', 5, AF11)>,  /* ETH1_RMII_RXD1 */
+			 <STM32_PINMUX('A', 1, AF11)>,  /* ETH1_RMII_REF_CLK input */
+			 <STM32_PINMUX('A', 7, AF11)>;  /* ETH1_RMII_CRS_DV */
+	};
+};
+
+&sdmmc2_b4_pins_a {
+	pins1 {
+		pinmux = <STM32_PINMUX('B', 14, AF9)>, /* SDMMC2_D0 */
+			 <STM32_PINMUX('B', 7, AF10)>, /* SDMMC2_D1 */
+			 <STM32_PINMUX('B', 3, AF9)>, /* SDMMC2_D2 */
+			 <STM32_PINMUX('B', 4, AF9)>, /* SDMMC2_D3 */
+			 <STM32_PINMUX('G', 6, AF10)>; /* SDMMC2_CMD */
+	};
+};
+
+&sdmmc2_d47_pins_a {
+	pins {
+		pinmux = <STM32_PINMUX('A', 8, AF9)>, /* SDMMC2_D4 */
+			 <STM32_PINMUX('A', 9, AF10)>, /* SDMMC2_D5 */
+			 <STM32_PINMUX('C', 6, AF10)>, /* SDMMC2_D6 */
+			 <STM32_PINMUX('C', 7, AF10)>; /* SDMMC2_D7 */
+	};
+};
diff --git a/arch/arm/dts/stm32mp151-prtt1l-net.dtsi b/arch/arm/dts/stm32mp151-prtt1l-net.dtsi
new file mode 100644
index 0000000000..04f4d64aaa
--- /dev/null
+++ b/arch/arm/dts/stm32mp151-prtt1l-net.dtsi
@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-3-Clause)
+// SPDX-FileCopyrightText: 2021 David Jander, Protonic Holland
+// SPDX-FileCopyrightText: 2021 Oleksij Rempel, Pengutronix
+
+&ethernet0 {
+	pinctrl-0 = <&ethernet0_rmii_pins_a>;
+	pinctrl-names = "default";
+	phy-mode = "rmii";
+	phy-reset-gpios = <&gpioa 3 GPIO_ACTIVE_LOW>;
+	status = "okay";
+
+	mdio0 {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		compatible = "snps,dwmac-mdio";
+		phy0: ethernet-phy@0 {
+			reg = <0>;
+		};
+	};
+};
+
+&ethernet0_rmii_pins_a {
+	pins1 {
+		pinmux = <STM32_PINMUX('B', 12, AF11)>, /* ETH1_RMII_TXD0 */
+			 <STM32_PINMUX('B', 13, AF11)>, /* ETH1_RMII_TXD1 */
+			 <STM32_PINMUX('B', 11, AF11)>, /* ETH1_RMII_TX_EN */
+			 <STM32_PINMUX('A', 2, AF11)>,  /* ETH1_MDIO */
+			 <STM32_PINMUX('C', 1, AF11)>;  /* ETH1_MDC */
+	};
+	pins2 {
+		pinmux = <STM32_PINMUX('C', 4, AF11)>,  /* ETH1_RMII_RXD0 */
+			 <STM32_PINMUX('C', 5, AF11)>,  /* ETH1_RMII_RXD1 */
+			 <STM32_PINMUX('A', 1, AF11)>,  /* ETH1_RMII_REF_CLK input */
+			 <STM32_PINMUX('A', 7, AF11)>;  /* ETH1_RMII_CRS_DV */
+	};
+};
diff --git a/arch/arm/dts/stm32mp151-prtt1l.dtsi b/arch/arm/dts/stm32mp151-prtt1l.dtsi
new file mode 100644
index 0000000000..80ae72dee2
--- /dev/null
+++ b/arch/arm/dts/stm32mp151-prtt1l.dtsi
@@ -0,0 +1,109 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-3-Clause)
+// SPDX-FileCopyrightText: 2021 David Jander, Protonic Holland
+// SPDX-FileCopyrightText: 2021 Oleksij Rempel, Pengutronix
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+#include <arm/stm32mp151.dtsi>
+#include <arm/stm32mp15-pinctrl.dtsi>
+#include <arm/stm32mp15xxad-pinctrl.dtsi>
+
+#include "stm32mp151.dtsi"
+
+/ {
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	aliases {
+		serial0 = &uart4;
+		ethernet0 = &ethernet0;
+	};
+
+	v3v3: fixed-regulator-v3v3 {
+		compatible = "regulator-fixed";
+		regulator-name = "v3v3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+	};
+
+	led {
+		compatible = "gpio-leds";
+
+		led-0 {
+			label = "debug:red";
+			gpios = <&gpioa 13 GPIO_ACTIVE_LOW>;
+		};
+
+		led-1 {
+			label = "debug:green";
+			gpios = <&gpioa 14 GPIO_ACTIVE_LOW>;
+			linux,default-trigger = "heartbeat";
+		};
+	};
+};
+
+&usbh_ehci {
+	phys = <&usbphyc_port0>;
+	phy-names = "usb";
+	status = "okay";
+};
+
+&usbotg_hs {
+	dr_mode = "host";
+	pinctrl-0 = <&usbotg_hs_pins_a>;
+	pinctrl-names = "default";
+	phys = <&usbphyc_port1 0>;
+	phy-names = "usb2-phy";
+	status = "okay";
+};
+
+&usbphyc {
+	status = "okay";
+};
+
+&usbphyc_port1 {
+	phy-supply = <&v3v3>;
+};
+
+&sdmmc1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&sdmmc1_b4_pins_a>;
+	st,neg-edge;
+	bus-width = <4>;
+	sd-uhs-sdr12;
+	sd-uhs-sdr25;
+	sd-uhs-sdr50;
+	sd-uhs-ddr50;
+	vmmc-supply = <&v3v3>;
+	vqmmc-supply = <&v3v3>;
+	status = "okay";
+};
+
+&sdmmc1_b4_pins_a {
+	pins1 {
+		bias-pull-up;
+	};
+	pins2 {
+		bias-pull-up;
+	};
+};
+
+&uart4 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart4_pins_a>;
+	status = "okay";
+};
+
+&uart4_pins_a {
+	pins1 {
+		pinmux = <STM32_PINMUX('B', 9, AF8)>; /* UART4_TX */
+		bias-disable;
+		drive-push-pull;
+		slew-rate = <0>;
+	};
+	pins2 {
+		pinmux = <STM32_PINMUX('B', 2, AF8)>; /* UART4_RX */
+		bias-pull-up;
+	};
+};
diff --git a/arch/arm/dts/stm32mp151-prtt1s.dts b/arch/arm/dts/stm32mp151-prtt1s.dts
new file mode 100644
index 0000000000..f9093d01ac
--- /dev/null
+++ b/arch/arm/dts/stm32mp151-prtt1s.dts
@@ -0,0 +1,20 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-3-Clause)
+// SPDX-FileCopyrightText: 2021 David Jander, Protonic Holland
+// SPDX-FileCopyrightText: 2021 Oleksij Rempel, Pengutronix
+/dts-v1/;
+
+#include "stm32mp151-prtt1l.dtsi"
+#include "stm32mp151-prtt1l-net.dtsi"
+
+/ {
+	model = "Protonic PRTT1S";
+	compatible = "prt,prtt1s", "st,stm32mp151";
+
+	chosen {
+		environment-sd {
+			compatible = "barebox,environment";
+			device-path = &sdmmc1, "partname:barebox-environment";
+			status = "disabled";
+		};
+	};
+};