diff --git a/fdts/stm32mp15-ddr3-1x2Gb-1066-binG.dtsi b/fdts/stm32mp15-ddr3-1x2Gb-1066-binG.dtsi
new file mode 100644
index 0000000..332d1bf
--- /dev/null
+++ b/fdts/stm32mp15-ddr3-1x2Gb-1066-binG.dtsi
@@ -0,0 +1,119 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/*
+ * Copyright (C) 2023, STMicroelectronics - All Rights Reserved
+ */
+
+/*
+ * File generated by STMicroelectronics STM32CubeMX DDR Tool for MPUs
+ * DDR type: DDR3 / DDR3L
+ * DDR width: 16bits
+ * DDR density: 4Gb
+ * System frequency: 533000Khz
+ * Relaxed Timing Mode: false
+ * Address mapping type: RBC
+ *
+ * Save Date: 2020.02.20, save Time: 18:45:20
+ */
+
+#define DDR_MEM_NAME	"DDR3-DDR3L 16bits 533000kHz"
+#define DDR_MEM_SPEED	533000
+#define DDR_MEM_SIZE	0x10000000
+
+#define DDR_MSTR 0x00041401
+#define DDR_MRCTRL0 0x00000010
+#define DDR_MRCTRL1 0x00000000
+#define DDR_DERATEEN 0x00000000
+#define DDR_DERATEINT 0x00800000
+#define DDR_PWRCTL 0x00000000
+#define DDR_PWRTMG 0x00400010
+#define DDR_HWLPCTL 0x00000000
+#define DDR_RFSHCTL0 0x00210000
+#define DDR_RFSHCTL3 0x00000000
+#define DDR_RFSHTMG 0x0040008B
+#define DDR_CRCPARCTL0 0x00000000
+#define DDR_DRAMTMG0 0x121B1214
+#define DDR_DRAMTMG1 0x000A041C
+#define DDR_DRAMTMG2 0x0608090F
+#define DDR_DRAMTMG3 0x0050400C
+#define DDR_DRAMTMG4 0x08040608
+#define DDR_DRAMTMG5 0x06060403
+#define DDR_DRAMTMG6 0x02020002
+#define DDR_DRAMTMG7 0x00000202
+#define DDR_DRAMTMG8 0x00001005
+#define DDR_DRAMTMG14 0x000000A0
+#define DDR_ZQCTL0 0xC2000040
+#define DDR_DFITMG0 0x02060105
+#define DDR_DFITMG1 0x00000202
+#define DDR_DFILPCFG0 0x07000000
+#define DDR_DFIUPD0 0xC0400003
+#define DDR_DFIUPD1 0x00000000
+#define DDR_DFIUPD2 0x00000000
+#define DDR_DFIPHYMSTR 0x00000000
+#define DDR_ODTCFG 0x06000600
+#define DDR_ODTMAP 0x00000001
+#define DDR_SCHED 0x00000C01
+#define DDR_SCHED1 0x00000000
+#define DDR_PERFHPR1 0x01000001
+#define DDR_PERFLPR1 0x08000200
+#define DDR_PERFWR1 0x08000400
+#define DDR_DBG0 0x00000000
+#define DDR_DBG1 0x00000000
+#define DDR_DBGCMD 0x00000000
+#define DDR_POISONCFG 0x00000000
+#define DDR_PCCFG 0x00000010
+#define DDR_PCFGR_0 0x00010000
+#define DDR_PCFGW_0 0x00000000
+#define DDR_PCFGQOS0_0 0x02100C03
+#define DDR_PCFGQOS1_0 0x00800100
+#define DDR_PCFGWQOS0_0 0x01100C03
+#define DDR_PCFGWQOS1_0 0x01000200
+#define DDR_PCFGR_1 0x00010000
+#define DDR_PCFGW_1 0x00000000
+#define DDR_PCFGQOS0_1 0x02100C03
+#define DDR_PCFGQOS1_1 0x00800040
+#define DDR_PCFGWQOS0_1 0x01100C03
+#define DDR_PCFGWQOS1_1 0x01000200
+#define DDR_ADDRMAP1 0x00151515
+#define DDR_ADDRMAP2 0x00000000
+#define DDR_ADDRMAP3 0x1F000000
+#define DDR_ADDRMAP4 0x00001F1F
+#define DDR_ADDRMAP5 0x03030303
+#define DDR_ADDRMAP6 0x0F0F0303
+#define DDR_ADDRMAP9 0x00000000
+#define DDR_ADDRMAP10 0x00000000
+#define DDR_ADDRMAP11 0x00000000
+#define DDR_PGCR 0x01442E02
+#define DDR_PTR0 0x0022AA5B
+#define DDR_PTR1 0x04841104
+#define DDR_PTR2 0x042DA068
+#define DDR_ACIOCR 0x10400812
+#define DDR_DXCCR 0x00000C40
+#define DDR_DSGCR 0xF200011F
+#define DDR_DCR 0x0000000B
+#define DDR_DTPR0 0x38D488D0
+#define DDR_DTPR1 0x098B00D8
+#define DDR_DTPR2 0x10023600
+#define DDR_MR0 0x00000840
+#define DDR_MR1 0x00000000
+#define DDR_MR2 0x00000248
+#define DDR_MR3 0x00000000
+#define DDR_ODTCR 0x00010000
+#define DDR_ZQ0CR1 0x00000038
+#define DDR_DX0GCR 0x0000CE81
+#define DDR_DX0DLLCR 0x40000000
+#define DDR_DX0DQTR 0xFFFFFFFF
+#define DDR_DX0DQSTR 0x3DB02000
+#define DDR_DX1GCR 0x0000CE81
+#define DDR_DX1DLLCR 0x40000000
+#define DDR_DX1DQTR 0xFFFFFFFF
+#define DDR_DX1DQSTR 0x3DB02000
+#define DDR_DX2GCR 0x0000CE80
+#define DDR_DX2DLLCR 0x40000000
+#define DDR_DX2DQTR 0xFFFFFFFF
+#define DDR_DX2DQSTR 0x3DB02000
+#define DDR_DX3GCR 0x0000CE80
+#define DDR_DX3DLLCR 0x40000000
+#define DDR_DX3DQTR 0xFFFFFFFF
+#define DDR_DX3DQSTR 0x3DB02000
+
+#include "stm32mp15-ddr.dtsi"
diff --git a/fdts/stm32mp151a-prtt1a-fw-config.dts b/fdts/stm32mp151a-prtt1a-fw-config.dts
new file mode 100644
index 0000000..1bbae4e
--- /dev/null
+++ b/fdts/stm32mp151a-prtt1a-fw-config.dts
@@ -0,0 +1,7 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/*
+ * Copyright (c) 2023, Oleksij Rempel <kernel@pengutronix.de>, Pengutronix
+ */
+
+#define DDR_SIZE	0x10000000 /* 256 MB */
+#include "stm32mp15-fw-config.dtsi"
diff --git a/fdts/stm32mp151a-prtt1a.dts b/fdts/stm32mp151a-prtt1a.dts
new file mode 100644
index 0000000..be9bdae
--- /dev/null
+++ b/fdts/stm32mp151a-prtt1a.dts
@@ -0,0 +1,235 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/*
+ * Copyright (C) 2023, Protonic Holland - All Rights Reserved
+ * Author: David Jander <david@protonic.nl>
+ */
+/dts-v1/;
+
+#include "stm32mp151.dtsi"
+#include "stm32mp15-pinctrl.dtsi"
+#include "stm32mp15xxad-pinctrl.dtsi"
+#include <dt-bindings/clock/stm32mp1-clksrc.h>
+#include "stm32mp15-ddr3-1x2Gb-1066-binG.dtsi"
+
+/ {
+	model = "Protonic PRTT1A";
+	compatible = "prt,prtt1a", "st,stm32mp151";
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	aliases {
+		mmc0 = &sdmmc1;
+		mmc1 = &sdmmc2;
+		serial0 = &uart4;
+	};
+
+	memory@c0000000 {
+		device_type = "memory";
+		reg = <0xC0000000 0x10000000>;
+	};
+};
+
+&iwdg2 {
+	timeout-sec = <32>;
+	status = "okay";
+	secure-status = "okay";
+};
+
+&qspi {
+	pinctrl-names = "default", "sleep";
+	pinctrl-0 = <&qspi_clk_pins_a &qspi_bk1_pins_a>;
+	reg = <0x58003000 0x1000>, <0x70000000 0x4000000>;
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+
+	flash@0 {
+		compatible = "spi-nand";
+		reg = <0>;
+		spi-rx-bus-width = <4>;
+		spi-max-frequency = <104000000>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+	};
+};
+
+&qspi_bk1_pins_a {
+	pins1 {
+		bias-pull-up;
+		drive-push-pull;
+		slew-rate = <1>;
+	};
+};
+
+&rcc {
+	st,clksrc = <
+		CLK_MPU_PLL1P
+		CLK_AXI_PLL2P
+		CLK_MCU_PLL3P
+		CLK_PLL12_HSE
+		CLK_PLL3_HSE
+		CLK_PLL4_HSE
+		CLK_RTC_LSI
+		CLK_MCO1_DISABLED
+		CLK_MCO2_DISABLED
+	>;
+
+	st,clkdiv = <
+		1 /*MPU*/
+		0 /*AXI*/
+		0 /*MCU*/
+		1 /*APB1*/
+		1 /*APB2*/
+		1 /*APB3*/
+		1 /*APB4*/
+		2 /*APB5*/
+		23 /*RTC*/
+		0 /*MCO1*/
+		0 /*MCO2*/
+	>;
+
+	st,pkcs = <
+		CLK_CKPER_HSE
+		CLK_FMC_ACLK
+		CLK_QSPI_ACLK
+		CLK_ETH_DISABLED
+		CLK_SDMMC12_PLL4P
+		CLK_DSI_DSIPLL
+		CLK_STGEN_HSE
+		CLK_USBPHY_HSE
+		CLK_SPI2S1_PLL3Q
+		CLK_SPI2S23_PLL3Q
+		CLK_SPI45_HSI
+		CLK_SPI6_HSI
+		CLK_I2C46_HSI
+		CLK_SDMMC3_PLL4P
+		CLK_USBO_USBPHY
+		CLK_ADC_CKPER
+		CLK_CEC_LSI
+		CLK_I2C12_HSI
+		CLK_I2C35_HSI
+		CLK_UART1_HSI
+		CLK_UART24_HSI
+		CLK_UART35_HSI
+		CLK_UART6_HSI
+		CLK_UART78_HSI
+		CLK_SPDIF_PLL4P
+		CLK_FDCAN_PLL4R
+		CLK_SAI1_PLL3Q
+		CLK_SAI2_PLL3Q
+		CLK_SAI3_PLL3Q
+		CLK_SAI4_PLL3Q
+		CLK_RNG1_LSI
+		CLK_RNG2_LSI
+		CLK_LPTIM1_PCLK1
+		CLK_LPTIM23_PCLK3
+		CLK_LPTIM45_LSI
+	>;
+
+	/* VCO = 1300.0 MHz => P = 650 (CPU) */
+	pll1: st,pll@0 {
+		compatible = "st,stm32mp1-pll";
+		reg = <0>;
+		cfg = <2 80 0 0 0 PQR(1,0,0)>;
+		frac = <0x800>;
+	};
+
+	/* VCO = 1066.0 MHz => P = 266 (AXI), Q = 533 (GPU), R = 533 (DDR) */
+	pll2: st,pll@1 {
+		compatible = "st,stm32mp1-pll";
+		reg = <1>;
+		cfg = <2 65 1 0 0 PQR(1,1,1)>;
+		frac = <0x1400>;
+	};
+
+	/* VCO = 417.8 MHz => P = 209, Q = 24, R = 11 */
+	pll3: st,pll@2 {
+		compatible = "st,stm32mp1-pll";
+		reg = <2>;
+		cfg = <1 33 1 16 36 PQR(1,1,1)>;
+		frac = <0x1a04>;
+	};
+
+	/* VCO = 480.0 MHz => P = 120, Q = 40, R = 96 */
+	pll4: st,pll@3 {
+		compatible = "st,stm32mp1-pll";
+		reg = <3>;
+		cfg = <1 39 3 11 4 PQR(1,1,1)>;
+	};
+};
+
+&rng1 {
+	status = "okay";
+};
+
+&rtc {
+	status = "okay";
+};
+
+&sdmmc1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&sdmmc1_b4_pins_a>;
+	bus-width = <4>;
+	status = "okay";
+};
+
+&sdmmc1_b4_pins_a {
+	pins1 {
+		bias-pull-up;
+	};
+	pins2 {
+		bias-pull-up;
+	};
+};
+
+/* NOTE: Although the PRTT1A does not have an eMMC, we declare it
+ * anyway, in order to be able to use the same binary for the
+ * PRTT1C also. All involved pins are N.C. on PRTT1A/S for that
+ * reason, so it should do no harm. All inputs configured with
+ * pull-ups to avoid floating inputs. */
+&sdmmc2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&sdmmc2_b4_pins_a &sdmmc2_d47_pins_a>;
+	bus-width = <8>;
+	status = "okay";
+};
+
+&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 */
+	};
+};
+
+&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;
+	};
+};