[PATCH v1 1/2] arm: boards: Add support for PRTT1x STM32MP151 based boards

[Oleksij Rempel <o.rempel@pengutronix.de>]

From: David Jander <david@protonic.nl>

- 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.

All arch/arm/dts/stm32mp151-prtt1X.dtsi files will be removed after
kernel mainlining is done.

Signed-off-by: David Jander <david@protonic.nl>
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
---
 arch/arm/boards/Makefile                     |   1 +
 arch/arm/boards/protonic-stm32mp1/Makefile   |   2 +
 arch/arm/boards/protonic-stm32mp1/board.c    |  38 +++
 arch/arm/boards/protonic-stm32mp1/lowlevel.c |  56 ++++
 arch/arm/dts/Makefile                        |   4 +
 arch/arm/dts/stm32mp151-prtt1a.dts           |  36 ++
 arch/arm/dts/stm32mp151-prtt1a.dtsi          |  38 +++
 arch/arm/dts/stm32mp151-prtt1c.dts           |  40 +++
 arch/arm/dts/stm32mp151-prtt1c.dtsi          | 325 +++++++++++++++++++
 arch/arm/dts/stm32mp151-prtt1l.dtsi          | 264 +++++++++++++++
 arch/arm/dts/stm32mp151-prtt1s.dts           |  36 ++
 arch/arm/dts/stm32mp151-prtt1s.dtsi          |  48 +++
 arch/arm/mach-stm32mp/Kconfig                |   7 +
 images/Makefile.stm32mp                      |   9 +
 14 files changed, 904 insertions(+)
 create mode 100644 arch/arm/boards/protonic-stm32mp1/Makefile
 create mode 100644 arch/arm/boards/protonic-stm32mp1/board.c
 create mode 100644 arch/arm/boards/protonic-stm32mp1/lowlevel.c
 create mode 100644 arch/arm/dts/stm32mp151-prtt1a.dts
 create mode 100644 arch/arm/dts/stm32mp151-prtt1a.dtsi
 create mode 100644 arch/arm/dts/stm32mp151-prtt1c.dts
 create mode 100644 arch/arm/dts/stm32mp151-prtt1c.dtsi
 create mode 100644 arch/arm/dts/stm32mp151-prtt1l.dtsi
 create mode 100644 arch/arm/dts/stm32mp151-prtt1s.dts
 create mode 100644 arch/arm/dts/stm32mp151-prtt1s.dtsi

diff --git a/arch/arm/boards/Makefile b/arch/arm/boards/Makefile
index b7a72d5ba0..08815d79ec 100644
--- a/arch/arm/boards/Makefile
+++ b/arch/arm/boards/Makefile
@@ -107,6 +107,7 @@ obj-$(CONFIG_MACH_PM9263)			+= pm9263/
 obj-$(CONFIG_MACH_PM9G45)			+= pm9g45/
 obj-$(CONFIG_MACH_PROTONIC_IMX6)		+= protonic-imx6/
 obj-$(CONFIG_MACH_PROTONIC_IMX8M)		+= protonic-imx8m/
+obj-$(CONFIG_MACH_PROTONIC_STM32MP1)		+= protonic-stm32mp1/
 obj-$(CONFIG_MACH_QIL_A9260)			+= qil-a926x/
 obj-$(CONFIG_MACH_QIL_A9G20)			+= qil-a926x/
 obj-$(CONFIG_MACH_RADXA_ROCK)			+= radxa-rock/
diff --git a/arch/arm/boards/protonic-stm32mp1/Makefile b/arch/arm/boards/protonic-stm32mp1/Makefile
new file mode 100644
index 0000000000..092c31d6b2
--- /dev/null
+++ b/arch/arm/boards/protonic-stm32mp1/Makefile
@@ -0,0 +1,2 @@
+lwl-y += lowlevel.o
+obj-y += board.o
diff --git a/arch/arm/boards/protonic-stm32mp1/board.c b/arch/arm/boards/protonic-stm32mp1/board.c
new file mode 100644
index 0000000000..7edf7e96ff
--- /dev/null
+++ b/arch/arm/boards/protonic-stm32mp1/board.c
@@ -0,0 +1,38 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include <bootsource.h>
+#include <common.h>
+#include <init.h>
+#include <mach/bbu.h>
+
+static int t1a_probe(struct device_d *dev)
+{
+	int flags;
+
+	flags = bootsource_get_instance() == 0 ? BBU_HANDLER_FLAG_DEFAULT : 0;
+	stm32mp_bbu_mmc_register_handler("sd", "/dev/mmc0.ssbl", flags);
+
+	flags = bootsource_get_instance() == 1 ? BBU_HANDLER_FLAG_DEFAULT : 0;
+	stm32mp_bbu_mmc_register_handler("emmc", "/dev/mmc1.ssbl", flags);
+
+	if (bootsource_get_instance() == 0)
+		of_device_enable_path("/chosen/environment-sd");
+	else
+		of_device_enable_path("/chosen/environment-emmc");
+
+	return 0;
+}
+
+static const struct of_device_id t1a_of_match[] = {
+	{ .compatible = "prt,prtt1a" },
+	{ .compatible = "prt,prtt1c" },
+	{ .compatible = "prt,prtt1s" },
+	{ /* sentinel */ },
+};
+
+static struct driver_d t1a_board_driver = {
+	.name = "board-prtt1l",
+	.probe = t1a_probe,
+	.of_compatible = t1a_of_match,
+};
+postcore_platform_driver(t1a_board_driver);
diff --git a/arch/arm/boards/protonic-stm32mp1/lowlevel.c b/arch/arm/boards/protonic-stm32mp1/lowlevel.c
new file mode 100644
index 0000000000..6bbbf3e067
--- /dev/null
+++ b/arch/arm/boards/protonic-stm32mp1/lowlevel.c
@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: GPL-2.0+
+#include <common.h>
+#include <mach/entry.h>
+#include <debug_ll.h>
+
+extern char __dtb_z_stm32mp151_prtt1a_start[];
+extern char __dtb_z_stm32mp151_prtt1c_start[];
+extern char __dtb_z_stm32mp151_prtt1s_start[];
+
+static void setup_uart(void)
+{
+	/* first stage has set up the UART, so nothing to do here */
+	putc_ll('>');
+}
+
+ENTRY_FUNCTION(start_prtt1a, r0, r1, r2)
+{
+	void *fdt;
+
+	stm32mp_cpu_lowlevel_init();
+
+	if (IS_ENABLED(CONFIG_DEBUG_LL))
+		setup_uart();
+
+	fdt = __dtb_z_stm32mp151_prtt1a_start + get_runtime_offset();
+
+	stm32mp1_barebox_entry(fdt);
+}
+
+ENTRY_FUNCTION(start_prtt1c, r0, r1, r2)
+{
+	void *fdt;
+
+	stm32mp_cpu_lowlevel_init();
+
+	if (IS_ENABLED(CONFIG_DEBUG_LL))
+		setup_uart();
+
+	fdt = __dtb_z_stm32mp151_prtt1c_start + get_runtime_offset();
+
+	stm32mp1_barebox_entry(fdt);
+}
+
+ENTRY_FUNCTION(start_prtt1s, r0, r1, r2)
+{
+	void *fdt;
+
+	stm32mp_cpu_lowlevel_init();
+
+	if (IS_ENABLED(CONFIG_DEBUG_LL))
+		setup_uart();
+
+	fdt = __dtb_z_stm32mp151_prtt1s_start + get_runtime_offset();
+
+	stm32mp1_barebox_entry(fdt);
+}
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 7da366bda0..76c96752cd 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -95,6 +95,10 @@ 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..576ad54a28
--- /dev/null
+++ b/arch/arm/dts/stm32mp151-prtt1a.dts
@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR X11)
+
+#include "stm32mp151-prtt1a.dtsi"
+#include "stm32mp151.dtsi"
+
+/ {
+	chosen {
+		environment-sd {
+			compatible = "barebox,environment";
+			device-path = &sdmmc1, "partname:barebox-environment";
+			status = "okay";
+		};
+
+		environment-emmc {
+			compatible = "barebox,environment";
+			device-path = &sdmmc2, "partname:barebox-environment";
+			status = "okay";
+		};
+	};
+};
+
+&usbh_ehci {
+	status = "disabled";
+};
+
+&usbotg_hs {
+	status = "disabled";
+};
+
+&usbphyc {
+	status = "disabled";
+};
+
+&usbphyc_port1 {
+	status = "disabled";
+};
diff --git a/arch/arm/dts/stm32mp151-prtt1a.dtsi b/arch/arm/dts/stm32mp151-prtt1a.dtsi
new file mode 100644
index 0000000000..5042111742
--- /dev/null
+++ b/arch/arm/dts/stm32mp151-prtt1a.dtsi
@@ -0,0 +1,38 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/*
+ * Copyright (C) Protonic Holland
+ * Author: David Jander <david@protonic.nl>
+ */
+/dts-v1/;
+
+#include "stm32mp151-prtt1l.dtsi"
+
+/ {
+	model = "Protonic PRTT1A";
+	compatible = "prt,prtt1a", "st,stm32mp151";
+};
+
+&timers5 {
+	status = "okay";
+	pwm {
+		pinctrl-0 = <&pwm5_pins_a>;
+		pinctrl-1 = <&pwm5_sleep_pins_a>;
+		pinctrl-names = "default", "sleep";
+		status = "okay";
+	};
+	timer@1 {
+		status = "okay";
+	};
+};
+
+&pwm5_pins_a {
+	pins {
+		pinmux = <STM32_PINMUX('A', 0, AF2)>; /* TIM5_CH1 */
+	};
+};
+
+&pwm5_sleep_pins_a {
+	pins {
+		pinmux = <STM32_PINMUX('A', 0, ANALOG)>; /* TIM5_CH1 */
+	};
+};
diff --git a/arch/arm/dts/stm32mp151-prtt1c.dts b/arch/arm/dts/stm32mp151-prtt1c.dts
new file mode 100644
index 0000000000..658d691913
--- /dev/null
+++ b/arch/arm/dts/stm32mp151-prtt1c.dts
@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR X11)
+
+#include "stm32mp151-prtt1c.dtsi"
+#include "stm32mp151.dtsi"
+
+/ {
+	chosen {
+		environment-sd {
+			compatible = "barebox,environment";
+			device-path = &sdmmc1, "partname:barebox-environment";
+			status = "okay";
+		};
+
+		environment-emmc {
+			compatible = "barebox,environment";
+			device-path = &sdmmc2, "partname:barebox-environment";
+			status = "okay";
+		};
+	};
+};
+
+&sdmmc3 {
+	status = "disabled";
+};
+
+&usbh_ehci {
+	status = "disabled";
+};
+
+&usbotg_hs {
+	status = "disabled";
+};
+
+&usbphyc {
+	status = "disabled";
+};
+
+&usbphyc_port1 {
+	status = "disabled";
+};
diff --git a/arch/arm/dts/stm32mp151-prtt1c.dtsi b/arch/arm/dts/stm32mp151-prtt1c.dtsi
new file mode 100644
index 0000000000..c8951a0705
--- /dev/null
+++ b/arch/arm/dts/stm32mp151-prtt1c.dtsi
@@ -0,0 +1,325 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/*
+ * Copyright (C) Protonic Holland
+ * Author: David Jander <david@protonic.nl>
+ */
+/dts-v1/;
+
+#include "stm32mp151-prtt1l.dtsi"
+
+/ {
+	model = "Protonic PRTT1C";
+	compatible = "prt,prtt1c", "st,stm32mp151";
+
+	clock_sja1105: clock-sja1105 {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <25000000>;
+	};
+
+	wfx_pwrseq: wfx_pwrseq {
+		compatible = "mmc-pwrseq-simple";
+		reset-gpios = <&gpiod 8 GPIO_ACTIVE_LOW>;
+	};
+};
+
+&qspi {
+	status = "disabled";
+};
+
+&ethernet0 {
+	/delete-property/phy-reset-gpios;
+	max-speed = <100>;
+
+	fixed-link {
+		speed = <100>;
+		full-duplex;
+	};
+
+	mdio0 {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		compatible = "snps,dwmac-mdio";
+
+		/* Switch port 0, DP83TD510 * /
+		t1l0_phy: ethernet-phy@6 {
+			compatible = "ethernet-phy-ieee802.3-c22";
+			reg = <6>;
+			max-speed = <10>;
+			interrupt-parent = <&gpioa>;
+			interrupts = <4 IRQ_TYPE_LEVEL_LOW>;
+			reset-gpios = <&gpioa 3 GPIO_ACTIVE_LOW>;
+		};
+
+		/* Switch port 1, DP83TD510 * /
+		t1l1_phy: ethernet-phy@7 {
+			compatible = "ethernet-phy-ieee802.3-c22";
+			reg = <7>;
+			max-speed = <10>;
+			interrupt-parent = <&gpiog>;
+			interrupts = <8 IRQ_TYPE_LEVEL_LOW>;
+			reset-gpios = <&gpiog 12 GPIO_ACTIVE_LOW>;
+		};
+
+		/* Switch port 2, DP83TD510 * /
+		t1l2_phy: ethernet-phy@10 {
+			compatible = "ethernet-phy-ieee802.3-c22";
+			reg = <10>;
+			max-speed = <10>;
+			interrupt-parent = <&gpiog>;
+			interrupts = <10 IRQ_TYPE_LEVEL_LOW>;
+			reset-gpios = <&gpiog 11 GPIO_ACTIVE_LOW>;
+		};
+
+		/* Switch port 3, KSZ9131 */
+		rj45_phy: ethernet-phy@2 {
+			reg = <2>;
+			max-speed = <100>;
+			interrupt-parent = <&gpiog>;
+			interrupts = <7 IRQ_TYPE_LEVEL_LOW>;
+			reset-gpios = <&gpiog 9 GPIO_ACTIVE_LOW>;
+		};
+	};
+};
+
+&spi1 {
+	/delete-property/dmas;
+	/delete-property/dma-names;
+	pinctrl-names = "default";
+	pinctrl-0 = <&spi1_pins_a1>;
+	cs-gpios = <&gpioa 15 GPIO_ACTIVE_LOW>;
+	status = "okay";
+
+	switch@0 {
+		compatible = "nxp,sja1105q";
+		reg = <0>;
+		spi-max-frequency = <4000000>;
+		spi-rx-delay-us = <1>;
+		spi-tx-delay-us = <1>;
+		spi-cpha;
+
+		reset-gpios = <&gpioe 6 GPIO_ACTIVE_LOW>;
+
+		clocks = <&clock_sja1105>;
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+				label = "t1l0";
+				phy-mode = "rmii";
+
+				fixed-link {
+					speed = <10>;
+					full-duplex;
+				};
+			};
+
+			port@1 {
+				reg = <1>;
+				label = "t1l1";
+				phy-mode = "rmii";
+
+				fixed-link {
+					speed = <10>;
+					full-duplex;
+				};
+			};
+
+			port@2 {
+				reg = <2>;
+				label = "t1l2";
+				phy-mode = "rmii";
+
+				fixed-link {
+					speed = <10>;
+					full-duplex;
+				};
+			};
+
+			port@3 {
+				reg = <3>;
+				label = "rj45";
+				phy-handle = <&rj45_phy>;
+				phy-mode = "rgmii-id";
+			};
+
+			port@4 {
+				reg = <4>;
+				label = "cpu";
+				ethernet = <&ethernet0>;
+				phy-mode = "rmii";
+
+				fixed-link {
+					speed = <100>;
+					full-duplex;
+				};
+			};
+		};
+	};
+};
+
+&sdmmc2 {
+	pinctrl-names = "default", "opendrain", "sleep";
+	pinctrl-0 = <&sdmmc2_b4_pins_a &sdmmc2_d47_pins_a>;
+	pinctrl-1 = <&sdmmc2_b4_od_pins_a &sdmmc2_d47_pins_a>;
+	pinctrl-2 = <&sdmmc2_b4_sleep_pins_a &sdmmc2_d47_sleep_pins_a>;
+	disable-wp;
+	disable-cd;
+	none-removable;
+	no-sd;
+	no-sdio;
+	no-1-8-v;
+	st,neg-edge;
+	bus-width = <8>;
+	vmmc-supply = <&v3v3>;
+	vqmmc-supply = <&v3v3>;
+	status = "okay";
+};
+
+&sdmmc3 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	pinctrl-names = "default", "opendrain", "sleep";
+	pinctrl-0 = <&sdmmc3_b4_pins_b>;
+	pinctrl-1 = <&sdmmc3_b4_od_pins_b>;
+	pinctrl-2 = <&sdmmc3_b4_sleep_pins_b>;
+	disable-wp;
+	disable-cd;
+	none-removable;
+	no-1-8-v;
+	st,neg-edge;
+	sd-uhs-sdr12;
+	sd-uhs-sdr25;
+	bus-width = <4>;
+	vmmc-supply = <&v3v3>;
+	vqmmc-supply = <&v3v3>;
+        mmc-pwrseq = <&wfx_pwrseq>;
+	status = "okay";
+
+	mmc@1 {
+		compatible = "silabs,wf200";
+		reg = <1>;
+	};
+};
+
+&pinctrl {
+	spi1_pins_a1: spi1-0 {
+		pins1 {
+			pinmux = <STM32_PINMUX('A', 5, AF5)>, /* SPI1_SCK */
+				 <STM32_PINMUX('B', 5, AF5)>; /* SPI1_MOSI */
+			bias-disable;
+			drive-push-pull;
+			slew-rate = <1>;
+		};
+
+		pins2 {
+			pinmux = <STM32_PINMUX('A', 6, AF5)>; /* SPI1_MISO */
+			bias-disable;
+		};
+	};
+};
+
+&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_b4_od_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 */
+	};
+};
+
+&sdmmc2_b4_sleep_pins_a {
+	pins {
+		pinmux = <STM32_PINMUX('B', 14, ANALOG)>, /* SDMMC2_D0 */
+			 <STM32_PINMUX('B', 7, ANALOG)>, /* SDMMC2_D1 */
+			 <STM32_PINMUX('B', 3, ANALOG)>, /* SDMMC2_D2 */
+			 <STM32_PINMUX('B', 4, ANALOG)>, /* SDMMC2_D3 */
+			 <STM32_PINMUX('E', 3, ANALOG)>, /* SDMMC2_CK */
+			 <STM32_PINMUX('G', 6, ANALOG)>; /* 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 */
+	};
+};
+
+&sdmmc2_d47_sleep_pins_a {
+	pins {
+		pinmux = <STM32_PINMUX('A', 8, ANALOG)>, /* SDMMC2_D4 */
+			 <STM32_PINMUX('A', 9, ANALOG)>, /* SDMMC2_D5 */
+			 <STM32_PINMUX('C', 6, ANALOG)>, /* SDMMC2_D6 */
+			 <STM32_PINMUX('D', 3, ANALOG)>; /* SDMMC2_D7 */
+	};
+};
+
+&sdmmc3_b4_pins_b {
+	pins1 {
+		pinmux = <STM32_PINMUX('D', 1, AF10)>, /* SDMMC3_D0 */
+			 <STM32_PINMUX('D', 4, AF10)>, /* SDMMC3_D1 */
+			 <STM32_PINMUX('D', 5, AF10)>, /* SDMMC3_D2 */
+			 <STM32_PINMUX('D', 7, AF10)>, /* SDMMC3_D3 */
+			 <STM32_PINMUX('D', 0, AF10)>; /* SDMMC3_CMD */
+	};
+};
+
+&sdmmc3_b4_od_pins_b {
+	pins1 {
+		pinmux = <STM32_PINMUX('D', 1, AF10)>, /* SDMMC3_D0 */
+			 <STM32_PINMUX('D', 4, AF10)>, /* SDMMC3_D1 */
+			 <STM32_PINMUX('D', 5, AF10)>, /* SDMMC3_D2 */
+			 <STM32_PINMUX('D', 7, AF10)>; /* SDMMC3_D3 */
+	};
+};
+
+&sdmmc3_b4_sleep_pins_b {
+	pins {
+		pinmux = <STM32_PINMUX('D', 1, ANALOG)>, /* SDMMC3_D0 */
+			 <STM32_PINMUX('D', 4, ANALOG)>, /* SDMMC3_D1 */
+			 <STM32_PINMUX('D', 5, ANALOG)>, /* SDMMC3_D2 */
+			 <STM32_PINMUX('D', 7, ANALOG)>, /* SDMMC3_D3 */
+			 <STM32_PINMUX('G', 15, ANALOG)>, /* SDMMC3_CK */
+			 <STM32_PINMUX('D', 0, ANALOG)>; /* SDMMC3_CMD */
+	};
+};
+
+&gpioa {
+	gpio-line-names =
+		"", "", "", "PHY0_nRESET", "PHY0_nINT", "", "", "",
+		"", "", "", "", "", "", "", "SPI1_nSS";
+};
+
+&gpiod {
+	gpio-line-names =
+		"", "", "", "", "", "", "", "",
+		"WFM_RESET", "", "", "", "", "", "", "";
+};
+
+&gpioe {
+	gpio-line-names =
+		"SDMMC2_nRESET", "", "", "", "", "", "SPI1_nRESET", "",
+		"", "", "", "", "WFM_nIRQ", "", "", "";
+};
+
+&gpiog {
+	gpio-line-names =
+		"", "", "", "", "", "", "", "PHY3_nINT",
+		"PHY1_nINT", "PHY3_nRESET", "PHY2_nINT", "PHY2_nRESET", "PHY1_nRESET", "SPE1_PWR", "SPE0_PWR", "";
+};
diff --git a/arch/arm/dts/stm32mp151-prtt1l.dtsi b/arch/arm/dts/stm32mp151-prtt1l.dtsi
new file mode 100644
index 0000000000..a7360f8156
--- /dev/null
+++ b/arch/arm/dts/stm32mp151-prtt1l.dtsi
@@ -0,0 +1,264 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/*
+ * Copyright (C) Protonic Holland
+ * Author: David Jander <david@protonic.nl>
+ */
+/dts-v1/;
+
+#include <arm/stm32mp151.dtsi>
+#include <arm/stm32mp15-pinctrl.dtsi>
+#include <arm/stm32mp15xxad-pinctrl.dtsi>
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	aliases {
+		serial0 = &uart4;
+		ethernet0 = &ethernet0;
+	};
+
+	memory@c0000000 {
+		device_type = "memory";
+		reg = <0xC0000000 0x10000000>;
+	};
+
+	v3v3: fixed-regulator-v3v3 {
+		compatible = "regulator-fixed";
+		regulator-name = "v3v3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-always-on;
+		regulator-boot-on;
+	};
+
+	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";
+		};
+	};
+
+};
+
+&ethernet0 {
+	status = "okay";
+	pinctrl-0 = <&ethernet0_rmii_pins_a>;
+	pinctrl-1 = <&ethernet0_rmii_sleep_pins_a>;
+	pinctrl-names = "default", "sleep";
+	phy-mode = "rmii";
+	phy-reset-gpios = <&gpioa 3 GPIO_ACTIVE_LOW>;
+	max-speed = <10>;
+/*
+	fixed-link {
+		speed = <10>;
+		full-duplex;
+	};
+*/
+	phy-handle = <&phy0>;
+
+	mdio0 {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		compatible = "snps,dwmac-mdio";
+		phy0: ethernet-phy@0 {
+			reg = <0>;
+			interrupt-parent = <&gpioa>;
+			interrupts = <4 IRQ_TYPE_LEVEL_LOW>;
+		};
+	};
+};
+
+&qspi {
+	pinctrl-names = "default", "sleep";
+	pinctrl-0 = <&qspi_clk_pins_a &qspi_bk1_pins_a>;
+	pinctrl-1 = <&qspi_clk_sleep_pins_a &qspi_bk1_sleep_pins_a>;
+	reg = <0x58003000 0x1000>, <0x70000000 0x4000000>;
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+
+	flash0: w25n512gvpit@0 {
+		compatible = "jedec,spi-nand";
+		reg = <0>;
+		spi-rx-bus-width = <4>;
+		spi-max-frequency = <104000000>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			fsbl1@0 {
+				label = "fsbl1";
+				reg = <0x0 0x40000>;
+			};
+
+			fsbl2@40000 {
+				label = "fsbl2";
+				reg = <0x40000 0x40000>;
+			};
+
+			ssbl@80000 {
+				label = "fsbl2";
+				reg = <0x80000 0x100000>;
+			};
+
+			ubi@180000 {
+				label = "ubi";
+				reg = <0x180000 0x3e80000>;
+			};			
+		};
+	};
+};
+
+&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", "opendrain", "sleep";
+	pinctrl-0 = <&sdmmc1_b4_pins_a>;
+	pinctrl-1 = <&sdmmc1_b4_od_pins_a>;
+	pinctrl-2 = <&sdmmc1_b4_sleep_pins_a>;
+	/* cd-gpios = <&gpiog 1 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>; */
+	disable-wp;
+	disable-cd;
+	/* st,sig-dir; */
+	st,neg-edge;
+	/* st,use-ckin; */
+	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;
+	};
+};
+
+&sdmmc1_b4_od_pins_a {
+	pins1 {
+		bias-pull-up;
+	};
+	pins2 {
+		bias-pull-up;
+	};
+};
+
+&uart4 {
+	pinctrl-names = "default", "sleep", "idle";
+	pinctrl-0 = <&uart4_pins_a>;
+	pinctrl-1 = <&uart4_sleep_pins_a>;
+	pinctrl-2 = <&uart4_idle_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;
+	};
+};
+
+&uart4_idle_pins_a {
+	pins1 {
+		pinmux = <STM32_PINMUX('B', 9, ANALOG)>; /* UART4_TX */
+	};
+	pins2 {
+		pinmux = <STM32_PINMUX('B', 2, AF8)>; /* UART4_RX */
+		bias-pull-up;
+	};
+};
+
+&uart4_sleep_pins_a {
+	pins {
+		pinmux = <STM32_PINMUX('B', 9, ANALOG)>, /* UART4_TX */
+			<STM32_PINMUX('B', 2, ANALOG)>; /* UART4_RX */
+	};
+};
+
+&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 */
+	};
+};
+
+&ethernet0_rmii_sleep_pins_a {
+	pins1 {
+		pinmux = <STM32_PINMUX('B', 12, ANALOG)>, /* ETH1_RMII_TXD0 */
+			 <STM32_PINMUX('B', 13, ANALOG)>, /* ETH1_RMII_TXD1 */
+			 <STM32_PINMUX('B', 11, ANALOG)>, /* ETH1_RMII_TX_EN */
+			 <STM32_PINMUX('A', 2, ANALOG)>,  /* ETH1_MDIO */
+			 <STM32_PINMUX('C', 1, ANALOG)>,  /* ETH1_MDC */
+			 <STM32_PINMUX('C', 4, ANALOG)>,  /* ETH1_RMII_RXD0 */
+			 <STM32_PINMUX('C', 5, ANALOG)>,  /* ETH1_RMII_RXD1 */
+			 <STM32_PINMUX('A', 1, ANALOG)>,  /* ETH1_RMII_REF_CLK */
+			 <STM32_PINMUX('A', 7, ANALOG)>;  /* ETH1_RMII_CRS_DV */
+	};
+};
+
+&qspi_bk1_pins_a {
+	pins1 {
+		bias-pull-up;
+		drive-push-pull;
+		slew-rate = <1>;
+	};
+};
diff --git a/arch/arm/dts/stm32mp151-prtt1s.dts b/arch/arm/dts/stm32mp151-prtt1s.dts
new file mode 100644
index 0000000000..8949194742
--- /dev/null
+++ b/arch/arm/dts/stm32mp151-prtt1s.dts
@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR X11)
+
+#include "stm32mp151-prtt1s.dtsi"
+#include "stm32mp151.dtsi"
+
+/ {
+	chosen {
+		environment-sd {
+			compatible = "barebox,environment";
+			device-path = &sdmmc1, "partname:barebox-environment";
+			status = "okay";
+		};
+
+		environment-emmc {
+			compatible = "barebox,environment";
+			device-path = &sdmmc2, "partname:barebox-environment";
+			status = "okay";
+		};
+	};
+};
+
+&usbh_ehci {
+	status = "disabled";
+};
+
+&usbotg_hs {
+	status = "disabled";
+};
+
+&usbphyc {
+	status = "disabled";
+};
+
+&usbphyc_port1 {
+	status = "disabled";
+};
diff --git a/arch/arm/dts/stm32mp151-prtt1s.dtsi b/arch/arm/dts/stm32mp151-prtt1s.dtsi
new file mode 100644
index 0000000000..0f4638787a
--- /dev/null
+++ b/arch/arm/dts/stm32mp151-prtt1s.dtsi
@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/*
+ * Copyright (C) Protonic Holland
+ * Author: David Jander <david@protonic.nl>
+ */
+/dts-v1/;
+
+#include "stm32mp151-prtt1l.dtsi"
+
+/ {
+	model = "Protonic PRTT1S";
+	compatible = "prt,prtt1s", "st,stm32mp151";
+};
+
+&i2c1 {
+	status = "okay";
+	pinctrl-names = "default", "sleep";
+	pinctrl-0 = <&i2c1_pins_a>;
+	pinctrl-1 = <&i2c1_sleep_pins_a>;
+	clock-frequency = <100000>;
+	/delete-property/dmas;
+	/delete-property/dma-names;
+
+	hdc1080@40 {
+		compatible = "ti,hdc1080";
+		reg = <0x40>;
+	};
+
+	scd41@62 {
+		compatible = "sensirion,scd41";
+		reg = <0x62>;
+	};
+};
+
+
+&i2c1_pins_a {
+	pins {
+		pinmux = <STM32_PINMUX('D', 12, AF5)>, /* I2C1_SCL */
+			 <STM32_PINMUX('D', 13, AF5)>; /* I2C1_SDA */
+	};
+};
+
+&i2c1_sleep_pins_a {
+	pins {
+		pinmux = <STM32_PINMUX('D', 12, ANALOG)>, /* I2C1_SCL */
+			 <STM32_PINMUX('D', 13, ANALOG)>; /* I2C1_SDA */
+	};
+};
diff --git a/arch/arm/mach-stm32mp/Kconfig b/arch/arm/mach-stm32mp/Kconfig
index 95d3dc510d..8328eb899a 100644
--- a/arch/arm/mach-stm32mp/Kconfig
+++ b/arch/arm/mach-stm32mp/Kconfig
@@ -31,4 +31,11 @@ config MACH_STM32MP15X_EV1
 	  as SSBL on any STM32MP15X-EVAL platform, like the
 	  STM32MP157C-EV1
 
+config MACH_PROTONIC_STM32MP1
+	select ARCH_STM32MP157
+	bool "Protonic PRTT1L family of boards"
+	help
+	  Builds all barebox-prtt1*.img that can be deployed as SSBL
+	  on the respective PRTT1L family board
+
 endif
diff --git a/images/Makefile.stm32mp b/images/Makefile.stm32mp
index 3384f5014b..17f03908b0 100644
--- a/images/Makefile.stm32mp
+++ b/images/Makefile.stm32mp
@@ -23,6 +23,15 @@ FILE_barebox-stm32mp157c-lxa-mc1.img = start_stm32mp157c_lxa_mc1.pblb.stm32
 OPTS_start_stm32mp157c_lxa_mc1.pblb.stm32 = $(STM32MP1_OPTS)
 image-$(CONFIG_MACH_LXA_MC1) += barebox-stm32mp157c-lxa-mc1.img
 
+pblb-$(CONFIG_MACH_PROTONIC_STM32MP1) += start_prtt1a start_prtt1s start_prtt1c
+FILE_barebox-prtt1a.img = start_prtt1a.pblb.stm32
+FILE_barebox-prtt1c.img = start_prtt1c.pblb.stm32
+FILE_barebox-prtt1s.img = start_prtt1s.pblb.stm32
+OPTS_start_prtt1a.pblb.stm32 = $(STM32MP1_OPTS)
+OPTS_start_prtt1c.pblb.stm32 = $(STM32MP1_OPTS)
+OPTS_start_prtt1s.pblb.stm32 = $(STM32MP1_OPTS)
+image-$(CONFIG_MACH_PROTONIC_STM32MP1) += barebox-prtt1a.img barebox-prtt1s.img barebox-prtt1c.img
+
 pblb-$(CONFIG_MACH_SEEED_ODYSSEY) += start_stm32mp157c_seeed_odyssey
 FILE_barebox-stm32mp157c-seeed-odyssey.img = start_stm32mp157c_seeed_odyssey.pblb.stm32
 OPTS_start_stm32mp157c_seeed_odyssey.pblb.stm32 = $(STM32MP1_OPTS)
-- 
2.30.2


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