Merge tag 'stm32-mp25-for-v6.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/atorgue/stm32 into soc/newsoc

STM32 STM32MP25 for v6.5, round 1

Highlights:
----------

STM32MP25 family is composed of 4 SoCs defined as following:

  -STM32MP251: common part composed of 1*Cortex-A35,
   common peripherals like SDMMC, UART, SPI, I2C, PCIe, USB3,
   parallel and DSI display, 1*ETH ...

  -STM32MP253: STM32MP251 + 1*Cortex-A35 (dual CPU), a second ETH,
   CAN-FD and LVDS display.

  -STM32MP255: STM32MP253 + GPU/AI and video encode/decode.
  -STM32MP257: STM32MP255 + ETH TSN switch (2+1 ports).

  A second diversity layer exists for security features/A35 frequency:
  -STM32MP25xY, "Y" gives information:
    -Y = A means A35@1.2GHz + no cryp IP and no secure boot.
    -Y = C means A35@1.2GHz + cryp IP and secure boot.
    -Y = D means A35@1.5GHz + no cryp IP and no secure boot.
    -Y = F means A35@1.5GHz + cryp IP and secure boot.

This PR adds the STM32MP257F EV1 board support. This board embeds a
STM32MP257FAI SoC, with 4GB of DDR4, TSN switch (2+1 ports),
2*USB typeA, 1*USB2 typeC, SNOR OctoSPI, mini PCIe, STPMIC2 for power distribution ...

* tag 'stm32-mp25-for-v6.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/atorgue/stm32: (44 commits)
  MAINTAINERS: add entry for ARM/STM32 ARCHITECTURE
  arm64: defconfig: enable ARCH_STM32 and STM32 serial driver
  arm64: dts: st: add stm32mp257f-ev1 board support
  dt-bindings: stm32: document stm32mp257f-ev1 board
  arm64: dts: st: introduce stm32mp25 pinctrl files
  arm64: dts: st: introduce stm32mp25 SoCs family
  arm64: introduce STM32 family on Armv8 architecture
  dt-bindings: stm32: add st,stm32mp25-syscfg compatible for syscon
  pinctrl: stm32: add stm32mp257 pinctrl support
  dt-bindings: pinctrl: stm32: support for stm32mp257 and additional packages
  ARM: dts: stm32: fix i2s endpoint format property for stm32mp15xx-dkx
  ARM: dts: stm32: Fix audio routing on STM32MP15xx DHCOM PDK2
  ARM: dts: stm32: add required supplies of ov5640 in stm32mp157c-ev1
  ARM: dts: stm32: Update to generic ADC channel binding on DHSOM systems
  ARM: dts: stm32: adopt generic iio bindings for adc channels on dhcor-testbench
  ARM: dts: stm32: adopt generic iio bindings for adc channels on dhcor-drc
  ARM: dts: stm32: adopt generic iio bindings for adc channels on emstamp-argon
  ARM: dts: stm32: adopt generic iio bindings for adc channels on stm32mp157c-ed1
  ARM: dts: stm32: enable adc on stm32mp15xx-dkx boards
  ARM: dts: stm32: add vrefint support to adc2 on stm32mp15
  ...

Link: https://lore.kernel.org/r/080fc303-45c1-6cc0-4c5e-694e730896a6@foss.st.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

44 files changed, 1775 insertions, 102 deletions

diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index 59829fc90315..4c1c96000f3b 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -1266,7 +1266,8 @@ dtb-$(CONFIG_ARCH_STM32) += \
 	stm32mp157c-ev1.dtb \
 	stm32mp157c-ev1-scmi.dtb \
 	stm32mp157c-lxa-mc1.dtb \
-	stm32mp157c-odyssey.dtb
+	stm32mp157c-odyssey.dtb \
+	stm32mp157c-phycore-stm32mp1-3.dtb
 dtb-$(CONFIG_MACH_SUN4I) += \
 	sun4i-a10-a1000.dtb \
 	sun4i-a10-ba10-tvbox.dtb \
diff --git a/arch/arm/boot/dts/stm32f469-disco.dts b/arch/arm/boot/dts/stm32f469-disco.dts
index 5a0daf8e8b11..cbbd521bf010 100644
--- a/arch/arm/boot/dts/stm32f469-disco.dts
+++ b/arch/arm/boot/dts/stm32f469-disco.dts
@@ -160,7 +160,7 @@
 		};
 	};
 
-	panel-dsi@0 {
+	panel@0 {
 		compatible = "orisetech,otm8009a";
 		reg = <0>; /* dsi virtual channel (0..3) */
 		reset-gpios = <&gpioh 7 GPIO_ACTIVE_LOW>;
@@ -179,7 +179,7 @@
 	status = "okay";
 
 	port {
-		ltdc_out_dsi: endpoint@0 {
+		ltdc_out_dsi: endpoint {
 			remote-endpoint = <&dsi_in>;
 		};
 	};
diff --git a/arch/arm/boot/dts/stm32f746.dtsi b/arch/arm/boot/dts/stm32f746.dtsi
index dc868e6da40e..e3564b74a779 100644
--- a/arch/arm/boot/dts/stm32f746.dtsi
+++ b/arch/arm/boot/dts/stm32f746.dtsi
@@ -515,7 +515,7 @@
 		crc: crc@40023000 {
 			compatible = "st,stm32f7-crc";
 			reg = <0x40023000 0x400>;
-			clocks = <&rcc 0 12>;
+			clocks = <&rcc 0 STM32F7_AHB1_CLOCK(CRC)>;
 			status = "disabled";
 		};
 
diff --git a/arch/arm/boot/dts/stm32h750i-art-pi.dts b/arch/arm/boot/dts/stm32h750i-art-pi.dts
index f3e70d3b65ac..44c307f8b09c 100644
--- a/arch/arm/boot/dts/stm32h750i-art-pi.dts
+++ b/arch/arm/boot/dts/stm32h750i-art-pi.dts
@@ -208,7 +208,7 @@
 	dmas = <&dmamux1 45 0x400 0x05>,
 	       <&dmamux1 46 0x400 0x05>;
 	dma-names = "rx", "tx";
-	st,hw-flow-ctrl;
+	uart-has-rtscts;
 	status = "okay";
 
 	bluetooth {
diff --git a/arch/arm/boot/dts/stm32mp15-pinctrl.dtsi b/arch/arm/boot/dts/stm32mp15-pinctrl.dtsi
index e86d989dd351..06e969aa5fdb 100644
--- a/arch/arm/boot/dts/stm32mp15-pinctrl.dtsi
+++ b/arch/arm/boot/dts/stm32mp15-pinctrl.dtsi
@@ -341,6 +341,56 @@
 		};
 	};
 
+	ethernet0_rgmii_pins_d: rgmii-3 {
+		pins1 {
+			pinmux = <STM32_PINMUX('G', 5, AF11)>, /* ETH_RGMII_CLK125 */
+				 <STM32_PINMUX('G', 13, AF11)>,	/* ETH_RGMII_TXD0 */
+				 <STM32_PINMUX('G', 14, AF11)>,	/* ETH_RGMII_TXD1 */
+				 <STM32_PINMUX('C', 2, AF11)>, /* ETH_RGMII_TXD2 */
+				 <STM32_PINMUX('E', 2, AF11)>, /* ETH_RGMII_TXD3 */
+				 <STM32_PINMUX('B', 11, AF11)>,	/* ETH_RGMII_TX_CTL */
+				 <STM32_PINMUX('C', 1, AF11)>; /* ETH_MDC */
+			bias-disable;
+			drive-push-pull;
+			slew-rate = <2>;
+		};
+		pins2 {
+			pinmux = <STM32_PINMUX('A', 2, AF11)>; /* ETH_MDIO */
+			bias-disable;
+			drive-push-pull;
+			slew-rate = <0>;
+		};
+		pins3 {
+			pinmux = <STM32_PINMUX('C', 4, AF11)>, /* ETH_RGMII_RXD0 */
+				 <STM32_PINMUX('C', 5, AF11)>, /* ETH_RGMII_RXD1 */
+				 <STM32_PINMUX('H', 6, AF11)>, /* ETH_RGMII_RXD2 */
+				 <STM32_PINMUX('B', 1, AF11)>, /* ETH_RGMII_RXD3 */
+				 <STM32_PINMUX('A', 1, AF11)>, /* ETH_RGMII_RX_CLK */
+				 <STM32_PINMUX('A', 7, AF11)>; /* ETH_RGMII_RX_CTL */
+			bias-disable;
+		};
+	};
+
+	ethernet0_rgmii_sleep_pins_d: rgmii-sleep-3 {
+		pins1 {
+			pinmux = <STM32_PINMUX('G', 5, ANALOG)>, /* ETH_RGMII_CLK125 */
+				 <STM32_PINMUX('G', 4, ANALOG)>, /* ETH_RGMII_GTX_CLK */
+				 <STM32_PINMUX('G', 13, ANALOG)>, /* ETH_RGMII_TXD0 */
+				 <STM32_PINMUX('G', 14, ANALOG)>, /* ETH_RGMII_TXD1 */
+				 <STM32_PINMUX('C', 2, ANALOG)>, /* ETH_RGMII_TXD2 */
+				 <STM32_PINMUX('E', 2, ANALOG)>, /* ETH_RGMII_TXD3 */
+				 <STM32_PINMUX('B', 11, ANALOG)>, /* ETH_RGMII_TX_CTL */
+				 <STM32_PINMUX('A', 2, ANALOG)>, /* ETH_MDIO */
+				 <STM32_PINMUX('C', 1, ANALOG)>, /* ETH_MDC */
+				 <STM32_PINMUX('C', 4, ANALOG)>, /* ETH_RGMII_RXD0 */
+				 <STM32_PINMUX('C', 5, ANALOG)>, /* ETH_RGMII_RXD1 */
+				 <STM32_PINMUX('H', 6, ANALOG)>, /* ETH_RGMII_RXD2 */
+				 <STM32_PINMUX('B', 1, ANALOG)>, /* ETH_RGMII_RXD3 */
+				 <STM32_PINMUX('A', 1, ANALOG)>, /* ETH_RGMII_RX_CLK */
+				 <STM32_PINMUX('A', 7, ANALOG)>; /* ETH_RGMII_RX_CTL */
+		};
+	};
+
 	ethernet0_rmii_pins_a: rmii-0 {
 		pins1 {
 			pinmux = <STM32_PINMUX('G', 13, AF11)>, /* ETH1_RMII_TXD0 */
@@ -1441,6 +1491,30 @@
 		};
 	};
 
+	sai2b_pins_d: sai2b-3 {
+		pins1 {
+			pinmux = <STM32_PINMUX('H', 2, AF10)>, /* SAI2_SCK_B */
+				 <STM32_PINMUX('C', 0, AF8)>, /* SAI2_FS_B */
+				 <STM32_PINMUX('H', 3, AF10)>; /* SAI2_MCLK_B */
+			slew-rate = <0>;
+			drive-push-pull;
+			bias-disable;
+		};
+		pins2 {
+			pinmux = <STM32_PINMUX('F', 11, AF10)>; /* SAI2_SD_B */
+			bias-disable;
+		};
+	};
+
+	sai2b_sleep_pins_d: sai2b-sleep-3 {
+		pins1 {
+			pinmux = <STM32_PINMUX('H', 2, ANALOG)>, /* SAI2_SCK_B */
+				 <STM32_PINMUX('C', 0, ANALOG)>, /* SAI2_FS_B */
+				 <STM32_PINMUX('H', 3, ANALOG)>, /* SAI2_MCLK_B */
+				 <STM32_PINMUX('F', 11, ANALOG)>; /* SAI2_SD_B */
+		};
+	};
+
 	sai4a_pins_a: sai4a-0 {
 		pins {
 			pinmux = <STM32_PINMUX('B', 5, AF10)>; /* SAI4_SD_A */
@@ -1522,6 +1596,60 @@
 		};
 	};
 
+	sdmmc1_b4_pins_b: sdmmc1-b4-1 {
+		pins1 {
+			pinmux = <STM32_PINMUX('C', 8, AF12)>, /* SDMMC1_D0 */
+				 <STM32_PINMUX('C', 9, AF12)>, /* SDMMC1_D1 */
+				 <STM32_PINMUX('E', 6, AF8)>, /* SDMMC1_D2 */
+				 <STM32_PINMUX('C', 11, AF12)>, /* SDMMC1_D3 */
+				 <STM32_PINMUX('D', 2, AF12)>; /* SDMMC1_CMD */
+			slew-rate = <1>;
+			drive-push-pull;
+			bias-disable;
+		};
+		pins2 {
+			pinmux = <STM32_PINMUX('C', 12, AF12)>; /* SDMMC1_CK */
+			slew-rate = <2>;
+			drive-push-pull;
+			bias-disable;
+		};
+	};
+
+	sdmmc1_b4_od_pins_b: sdmmc1-b4-od-1 {
+		pins1 {
+			pinmux = <STM32_PINMUX('C', 8, AF12)>, /* SDMMC1_D0 */
+				 <STM32_PINMUX('C', 9, AF12)>, /* SDMMC1_D1 */
+				 <STM32_PINMUX('E', 6, AF8)>, /* SDMMC1_D2 */
+				 <STM32_PINMUX('C', 11, AF12)>; /* SDMMC1_D3 */
+			slew-rate = <1>;
+			drive-push-pull;
+			bias-disable;
+		};
+		pins2 {
+			pinmux = <STM32_PINMUX('C', 12, AF12)>; /* SDMMC1_CK */
+			slew-rate = <2>;
+			drive-push-pull;
+			bias-disable;
+		};
+		pins3 {
+			pinmux = <STM32_PINMUX('D', 2, AF12)>; /* SDMMC1_CMD */
+			slew-rate = <1>;
+			drive-open-drain;
+			bias-disable;
+		};
+	};
+
+	sdmmc1_b4_sleep_pins_b: sdmmc1-b4-sleep-1 {
+		pins {
+			pinmux = <STM32_PINMUX('C', 8, ANALOG)>, /* SDMMC1_D0 */
+				 <STM32_PINMUX('C', 9, ANALOG)>, /* SDMMC1_D1 */
+				 <STM32_PINMUX('E', 6, ANALOG)>, /* SDMMC1_D2 */
+				 <STM32_PINMUX('C', 11, ANALOG)>, /* SDMMC1_D3 */
+				 <STM32_PINMUX('C', 12, ANALOG)>, /* SDMMC1_CK */
+				 <STM32_PINMUX('D', 2, ANALOG)>; /* SDMMC1_CMD */
+		};
+	};
+
 	sdmmc1_dir_pins_a: sdmmc1-dir-0 {
 		pins1 {
 			pinmux = <STM32_PINMUX('F', 2, AF11)>, /* SDMMC1_D0DIR */
@@ -1759,6 +1887,27 @@
 		};
 	};
 
+	sdmmc2_d47_pins_e: sdmmc2-d47-4 {
+		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('D', 3, AF9)>;	/* SDMMC2_D7 */
+			slew-rate = <1>;
+			drive-push-pull;
+			bias-pull-up;
+		};
+	};
+
+	sdmmc2_d47_sleep_pins_e: sdmmc2-d47-sleep-4 {
+		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_a: sdmmc3-b4-0 {
 		pins1 {
 			pinmux = <STM32_PINMUX('F', 0, AF9)>, /* SDMMC3_D0 */
@@ -2124,6 +2273,33 @@
 		};
 	};
 
+	usart1_pins_a: usart1-0 {
+		pins1 {
+			pinmux = <STM32_PINMUX('A', 12, AF7)>; /* USART1_RTS */
+			bias-disable;
+			drive-push-pull;
+			slew-rate = <0>;
+		};
+		pins2 {
+			pinmux = <STM32_PINMUX('A', 11, AF7)>; /* USART1_CTS_NSS */
+			bias-disable;
+		};
+	};
+
+	usart1_idle_pins_a: usart1-idle-0 {
+		pins1 {
+			pinmux = <STM32_PINMUX('A', 12, ANALOG)>, /* USART1_RTS */
+				 <STM32_PINMUX('A', 11, AF7)>; /* USART1_CTS_NSS */
+		};
+	};
+
+	usart1_sleep_pins_a: usart1-sleep-0 {
+		pins {
+			pinmux = <STM32_PINMUX('A', 12, ANALOG)>, /* USART1_RTS */
+				 <STM32_PINMUX('A', 11, ANALOG)>; /* USART1_CTS_NSS */
+		};
+	};
+
 	usart2_pins_a: usart2-0 {
 		pins1 {
 			pinmux = <STM32_PINMUX('F', 5, AF7)>, /* USART2_TX */
@@ -2226,6 +2402,23 @@
 		};
 	};
 
+	usart3_idle_pins_a: usart3-idle-0 {
+		pins1 {
+			pinmux = <STM32_PINMUX('B', 10, ANALOG)>; /* USART3_TX */
+		};
+		pins2 {
+			pinmux = <STM32_PINMUX('B', 12, AF8)>; /* USART3_RX */
+			bias-disable;
+		};
+	};
+
+	usart3_sleep_pins_a: usart3-sleep-0 {
+		pins {
+			pinmux = <STM32_PINMUX('B', 10, ANALOG)>, /* USART3_TX */
+				 <STM32_PINMUX('B', 12, ANALOG)>; /* USART3_RX */
+		};
+	};
+
 	usart3_pins_b: usart3-1 {
 		pins1 {
 			pinmux = <STM32_PINMUX('B', 10, AF7)>, /* USART3_TX */
@@ -2463,4 +2656,42 @@
 			bias-disable;
 		};
 	};
+
+	spi1_sleep_pins_a: spi1-sleep-0 {
+		pins {
+			pinmux = <STM32_PINMUX('Z', 0, ANALOG)>, /* SPI1_SCK */
+				 <STM32_PINMUX('Z', 1, ANALOG)>, /* SPI1_MISO */
+				 <STM32_PINMUX('Z', 2, ANALOG)>; /* SPI1_MOSI */
+		};
+	};
+
+	usart1_pins_b: usart1-1 {
+		pins1 {
+			pinmux = <STM32_PINMUX('Z', 7, AF7)>; /* USART1_TX */
+			bias-disable;
+			drive-push-pull;
+			slew-rate = <0>;
+		};
+		pins2 {
+			pinmux = <STM32_PINMUX('Z', 6, AF7)>; /* USART1_RX */
+			bias-disable;
+		};
+	};
+
+	usart1_idle_pins_b: usart1-idle-1 {
+		pins1 {
+			pinmux = <STM32_PINMUX('Z', 7, ANALOG)>; /* USART1_TX */
+		};
+		pins2 {
+			pinmux = <STM32_PINMUX('Z', 6, AF7)>; /* USART1_RX */
+			bias-disable;
+		};
+	};
+
+	usart1_sleep_pins_b: usart1-sleep-1 {
+		pins {
+			pinmux = <STM32_PINMUX('Z', 7, ANALOG)>, /* USART1_TX */
+				 <STM32_PINMUX('Z', 6, ANALOG)>; /* USART1_RX */
+		};
+	};
 };
diff --git a/arch/arm/boot/dts/stm32mp151.dtsi b/arch/arm/boot/dts/stm32mp151.dtsi
index 63f4c78fcc1d..61508917521c 100644
--- a/arch/arm/boot/dts/stm32mp151.dtsi
+++ b/arch/arm/boot/dts/stm32mp151.dtsi
@@ -1093,6 +1093,8 @@
 			adc1: adc@0 {
 				compatible = "st,stm32mp1-adc";
 				#io-channel-cells = <1>;
+				#address-cells = <1>;
+				#size-cells = <0>;
 				reg = <0x0>;
 				interrupt-parent = <&adc>;
 				interrupts = <0>;
@@ -1104,12 +1106,24 @@
 			adc2: adc@100 {
 				compatible = "st,stm32mp1-adc";
 				#io-channel-cells = <1>;
+				#address-cells = <1>;
+				#size-cells = <0>;
 				reg = <0x100>;
 				interrupt-parent = <&adc>;
 				interrupts = <1>;
 				dmas = <&dmamux1 10 0x400 0x01>;
 				dma-names = "rx";
+				nvmem-cells = <&vrefint>;
+				nvmem-cell-names = "vrefint";
 				status = "disabled";
+				channel@13 {
+					reg = <13>;
+					label = "vrefint";
+				};
+				channel@14 {
+					reg = <14>;
+					label = "vddcore";
+				};
 			};
 		};
 
@@ -1529,11 +1543,6 @@
 			clock-names = "lcd";
 			resets = <&rcc LTDC_R>;
 			status = "disabled";
-
-			port {
-				#address-cells = <1>;
-				#size-cells = <0>;
-			};
 		};
 
 		iwdg2: watchdog@5a002000 {
@@ -1620,6 +1629,12 @@
 			reg = <0x5c005000 0x400>;
 			#address-cells = <1>;
 			#size-cells = <1>;
+			part_number_otp: part-number-otp@4 {
+				reg = <0x4 0x1>;
+			};
+			vrefint: vrefin-cal@52 {
+				reg = <0x52 0x2>;
+			};
 			ts_cal1: calib@5c {
 				reg = <0x5c 0x2>;
 			};
@@ -1820,8 +1835,8 @@
 			      <0x30000000 0x40000>,
 			      <0x38000000 0x10000>;
 			resets = <&rcc MCU_R>;
+			reset-names = "mcu_rst";
 			st,syscfg-holdboot = <&rcc 0x10C 0x1>;
-			st,syscfg-tz = <&rcc 0x000 0x1>;
 			st,syscfg-pdds = <&pwr_mcu 0x0 0x1>;
 			st,syscfg-rsc-tbl = <&tamp 0x144 0xFFFFFFFF>;
 			st,syscfg-m4-state = <&tamp 0x148 0xFFFFFFFF>;
diff --git a/arch/arm/boot/dts/stm32mp157.dtsi b/arch/arm/boot/dts/stm32mp157.dtsi
index 54e73ccea446..5e733cd16ff9 100644
--- a/arch/arm/boot/dts/stm32mp157.dtsi
+++ b/arch/arm/boot/dts/stm32mp157.dtsi
@@ -24,14 +24,7 @@
 			clock-names = "pclk", "ref", "px_clk";
 			resets = <&rcc DSI_R>;
 			reset-names = "apb";
-			#address-cells = <1>;
-			#size-cells = <0>;
 			status = "disabled";
-
-			ports {
-				#address-cells = <1>;
-				#size-cells = <0>;
-			};
 		};
 	};
 };
diff --git a/arch/arm/boot/dts/stm32mp157a-dk1-scmi.dts b/arch/arm/boot/dts/stm32mp157a-dk1-scmi.dts
index e539cc80bef8..afcd6285890c 100644
--- a/arch/arm/boot/dts/stm32mp157a-dk1-scmi.dts
+++ b/arch/arm/boot/dts/stm32mp157a-dk1-scmi.dts
@@ -55,8 +55,11 @@
 	resets = <&scmi_reset RST_SCMI_MDMA>;
 };
 
-&mlahb {
-	resets = <&scmi_reset RST_SCMI_MCU>;
+&m4_rproc {
+	/delete-property/ st,syscfg-holdboot;
+	resets = <&scmi_reset RST_SCMI_MCU>,
+		 <&scmi_reset RST_SCMI_MCU_HOLD_BOOT>;
+	reset-names =  "mcu_rst", "hold_boot";
 };
 
 &rcc {
diff --git a/arch/arm/boot/dts/stm32mp157a-icore-stm32mp1-ctouch2-of10.dts b/arch/arm/boot/dts/stm32mp157a-icore-stm32mp1-ctouch2-of10.dts
index 9a2a4bc7d079..4279b26547df 100644
--- a/arch/arm/boot/dts/stm32mp157a-icore-stm32mp1-ctouch2-of10.dts
+++ b/arch/arm/boot/dts/stm32mp157a-icore-stm32mp1-ctouch2-of10.dts
@@ -49,6 +49,9 @@
 	phy-dsi-supply = <&reg18>;
 
 	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
 		port@0 {
 			reg = <0>;
 			dsi_in: endpoint {
@@ -104,8 +107,7 @@
 	status = "okay";
 
 	port {
-		ltdc_ep0_out: endpoint@0 {
-			reg = <0>;
+		ltdc_ep0_out: endpoint {
 			remote-endpoint = <&dsi_in>;
 		};
 	};
diff --git a/arch/arm/boot/dts/stm32mp157a-icore-stm32mp1-edimm2.2.dts b/arch/arm/boot/dts/stm32mp157a-icore-stm32mp1-edimm2.2.dts
index 390ee8c05754..efba54289820 100644
--- a/arch/arm/boot/dts/stm32mp157a-icore-stm32mp1-edimm2.2.dts
+++ b/arch/arm/boot/dts/stm32mp157a-icore-stm32mp1-edimm2.2.dts
@@ -49,6 +49,9 @@
 	phy-dsi-supply = <&reg18>;
 
 	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
 		port@0 {
 			reg = <0>;
 			dsi_in_ltdc: endpoint {
@@ -104,8 +107,7 @@
 	status = "okay";
 
 	port {
-		ltdc_out_dsi: endpoint@0 {
-			reg = <0>;
+		ltdc_out_dsi: endpoint {
 			remote-endpoint = <&dsi_in_ltdc>;
 		};
 	};
diff --git a/arch/arm/boot/dts/stm32mp157a-microgea-stm32mp1-microdev2.0-of7.dts b/arch/arm/boot/dts/stm32mp157a-microgea-stm32mp1-microdev2.0-of7.dts
index 0d7560ba2950..5116a7785201 100644
--- a/arch/arm/boot/dts/stm32mp157a-microgea-stm32mp1-microdev2.0-of7.dts
+++ b/arch/arm/boot/dts/stm32mp157a-microgea-stm32mp1-microdev2.0-of7.dts
@@ -81,8 +81,7 @@
 	status = "okay";
 
 	port {
-		ltdc_ep0_out: endpoint@0 {
-			reg = <0>;
+		ltdc_ep0_out: endpoint {
 			remote-endpoint = <&panel_in>;
 		};
 	};
diff --git a/arch/arm/boot/dts/stm32mp157a-stinger96.dtsi b/arch/arm/boot/dts/stm32mp157a-stinger96.dtsi
index 3a36f7fe0a2c..5f85598cc7c6 100644
--- a/arch/arm/boot/dts/stm32mp157a-stinger96.dtsi
+++ b/arch/arm/boot/dts/stm32mp157a-stinger96.dtsi
@@ -287,7 +287,7 @@
 	pinctrl-names = "default", "sleep";
 	pinctrl-0 = <&usart2_pins_b>;
 	pinctrl-1 = <&usart2_sleep_pins_b>;
-	st,hw-flow-ctrl;
+	uart-has-rtscts;
 	/delete-property/dmas;
 	/delete-property/dma-names;
 	status = "okay";
@@ -297,7 +297,7 @@
 &uart4 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart4_pins_c>;
-	st,hw-flow-ctrl;
+	uart-has-rtscts;
 	/delete-property/dmas;
 	/delete-property/dma-names;
 	status = "okay";
diff --git a/arch/arm/boot/dts/stm32mp157c-dk2-scmi.dts b/arch/arm/boot/dts/stm32mp157c-dk2-scmi.dts
index 97e4f94b0a24..39358d902000 100644
--- a/arch/arm/boot/dts/stm32mp157c-dk2-scmi.dts
+++ b/arch/arm/boot/dts/stm32mp157c-dk2-scmi.dts
@@ -61,8 +61,11 @@
 	resets = <&scmi_reset RST_SCMI_MDMA>;
 };
 
-&mlahb {
-	resets = <&scmi_reset RST_SCMI_MCU>;
+&m4_rproc {
+	/delete-property/ st,syscfg-holdboot;
+	resets = <&scmi_reset RST_SCMI_MCU>,
+		 <&scmi_reset RST_SCMI_MCU_HOLD_BOOT>;
+	reset-names =  "mcu_rst", "hold_boot";
 };
 
 &rcc {
diff --git a/arch/arm/boot/dts/stm32mp157c-dk2.dts b/arch/arm/boot/dts/stm32mp157c-dk2.dts
index ab13e340f4ef..4bef2300ed7c 100644
--- a/arch/arm/boot/dts/stm32mp157c-dk2.dts
+++ b/arch/arm/boot/dts/stm32mp157c-dk2.dts
@@ -31,10 +31,15 @@
 };
 
 &dsi {
+	#address-cells = <1>;
+	#size-cells = <0>;
 	status = "okay";
 	phy-dsi-supply = <&reg18>;
 
 	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
 		port@0 {
 			reg = <0>;
 			dsi_in: endpoint {
@@ -82,6 +87,9 @@
 	status = "okay";
 
 	port {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
 		ltdc_ep1_out: endpoint@1 {
 			reg = <1>;
 			remote-endpoint = <&dsi_in>;
diff --git a/arch/arm/boot/dts/stm32mp157c-ed1-scmi.dts b/arch/arm/boot/dts/stm32mp157c-ed1-scmi.dts
index 9cf0a44d2f47..07ea765a4553 100644
--- a/arch/arm/boot/dts/stm32mp157c-ed1-scmi.dts
+++ b/arch/arm/boot/dts/stm32mp157c-ed1-scmi.dts
@@ -60,8 +60,11 @@
 	resets = <&scmi_reset RST_SCMI_MDMA>;
 };
 
-&mlahb {
-	resets = <&scmi_reset RST_SCMI_MCU>;
+&m4_rproc {
+	/delete-property/ st,syscfg-holdboot;
+	resets = <&scmi_reset RST_SCMI_MCU>,
+		 <&scmi_reset RST_SCMI_MCU_HOLD_BOOT>;
+	reset-names =  "mcu_rst", "hold_boot";
 };
 
 &rcc {
diff --git a/arch/arm/boot/dts/stm32mp157c-ed1.dts b/arch/arm/boot/dts/stm32mp157c-ed1.dts
index 8beb901be506..66ed5f9921ba 100644
--- a/arch/arm/boot/dts/stm32mp157c-ed1.dts
+++ b/arch/arm/boot/dts/stm32mp157c-ed1.dts
@@ -103,10 +103,20 @@
 	vref-supply = <&vdda>;
 	status = "disabled";
 	adc1: adc@0 {
-		st,adc-channels = <0 1 6>;
-		/* 16.5 ck_cycles sampling time */
-		st,min-sample-time-nsecs = <400>;
 		status = "okay";
+		channel@0 {
+			reg = <0>;
+			/* 16.5 ck_cycles sampling time */
+			st,min-sample-time-ns = <400>;
+		};
+		channel@1 {
+			reg = <1>;
+			st,min-sample-time-ns = <400>;
+		};
+		channel@6 {
+			reg = <6>;
+			st,min-sample-time-ns = <400>;
+		};
 	};
 };
 
diff --git a/arch/arm/boot/dts/stm32mp157c-emstamp-argon.dtsi b/arch/arm/boot/dts/stm32mp157c-emstamp-argon.dtsi
index b01470a9a3d5..94e38141af67 100644
--- a/arch/arm/boot/dts/stm32mp157c-emstamp-argon.dtsi
+++ b/arch/arm/boot/dts/stm32mp157c-emstamp-argon.dtsi
@@ -97,9 +97,11 @@
 	adc1: adc@0 {
 		pinctrl-names = "default";
 		pinctrl-0 = <&adc1_in6_pins_a>;
-		st,min-sample-time-nsecs = <5000>;
-		st,adc-channels = <6>;
 		status = "disabled";
+		channel@6 {
+			reg = <6>;
+			st,min-sample-time-ns = <5000>;
+		};
 	};
 
 	adc2: adc@100 {
diff --git a/arch/arm/boot/dts/stm32mp157c-ev1-scmi.dts b/arch/arm/boot/dts/stm32mp157c-ev1-scmi.dts
index 3b9dd6f4ccc9..813086ec2489 100644
--- a/arch/arm/boot/dts/stm32mp157c-ev1-scmi.dts
+++ b/arch/arm/boot/dts/stm32mp157c-ev1-scmi.dts
@@ -66,8 +66,11 @@
 	resets = <&scmi_reset RST_SCMI_MDMA>;
 };
 
-&mlahb {
-	resets = <&scmi_reset RST_SCMI_MCU>;
+&m4_rproc {
+	/delete-property/ st,syscfg-holdboot;
+	resets = <&scmi_reset RST_SCMI_MCU>,
+		 <&scmi_reset RST_SCMI_MCU_HOLD_BOOT>;
+	reset-names =  "mcu_rst", "hold_boot";
 };
 
 &rcc {
diff --git a/arch/arm/boot/dts/stm32mp157c-ev1.dts b/arch/arm/boot/dts/stm32mp157c-ev1.dts
index ba8e9d9a42fa..af3800501875 100644
--- a/arch/arm/boot/dts/stm32mp157c-ev1.dts
+++ b/arch/arm/boot/dts/stm32mp157c-ev1.dts
@@ -101,9 +101,14 @@
 
 &dsi {
 	phy-dsi-supply = <&reg18>;
+	#address-cells = <1>;
+	#size-cells = <0>;
 	status = "okay";
 
 	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
 		port@0 {
 			reg = <0>;
 			dsi_in: endpoint {
@@ -119,7 +124,7 @@
 		};
 	};
 
-	panel-dsi@0 {
+	panel@0 {
 		compatible = "raydium,rm68200";
 		reg = <0>;
 		reset-gpios = <&gpiof 15 GPIO_ACTIVE_LOW>;
@@ -185,7 +190,9 @@
 		reg = <0x3c>;
 		clocks = <&clk_ext_camera>;
 		clock-names = "xclk";
+		AVDD-supply = <&v2v8>;
 		DOVDD-supply = <&v2v8>;
+		DVDD-supply = <&v2v8>;
 		powerdown-gpios = <&stmfx_pinctrl 18 (GPIO_ACTIVE_HIGH | GPIO_PUSH_PULL)>;
 		reset-gpios = <&stmfx_pinctrl 19 (GPIO_ACTIVE_LOW | GPIO_PUSH_PULL)>;
 		rotation = <180>;
@@ -239,8 +246,7 @@
 	status = "okay";
 
 	port {
-		ltdc_ep0_out: endpoint@0 {
-			reg = <0>;
+		ltdc_ep0_out: endpoint {
 			remote-endpoint = <&dsi_in>;
 		};
 	};
diff --git a/arch/arm/boot/dts/stm32mp157c-lxa-mc1.dts b/arch/arm/boot/dts/stm32mp157c-lxa-mc1.dts
index 407ed3952f75..eada9cf257be 100644
--- a/arch/arm/boot/dts/stm32mp157c-lxa-mc1.dts
+++ b/arch/arm/boot/dts/stm32mp157c-lxa-mc1.dts
@@ -161,8 +161,7 @@
 	status = "okay";
 
 	port {
-		ltdc_ep0_out: endpoint@0 {
-			reg = <0>;
+		ltdc_ep0_out: endpoint {
 			remote-endpoint = <&panel_input>;
 		};
 	};
diff --git a/arch/arm/boot/dts/stm32mp157c-phycore-stm32mp1-3.dts b/arch/arm/boot/dts/stm32mp157c-phycore-stm32mp1-3.dts
new file mode 100644
index 000000000000..28d7203264ce
--- /dev/null
+++ b/arch/arm/boot/dts/stm32mp157c-phycore-stm32mp1-3.dts
@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/*
+ * Copyright (C) Phytec GmbH 2019-2020 - All Rights Reserved
+ * Author: Dom VOVARD <dom.vovard@linrt.com>.
+ */
+
+/dts-v1/;
+
+#include <dt-bindings/pinctrl/stm32-pinfunc.h>
+#include "stm32mp157.dtsi"
+#include "stm32mp15xc.dtsi"
+#include "stm32mp15xxac-pinctrl.dtsi"
+#include "stm32mp157c-phycore-stm32mp15-som.dtsi"
+
+/ {
+	model = "PHYTEC phyCORE-STM32MP1-3 Dev Board";
+	compatible = "phytec,phycore-stm32mp1-3",
+		     "phytec,phycore-stm32mp157c-som", "st,stm32mp157";
+
+	aliases {
+		mmc0 = &sdmmc1;
+		mmc1 = &sdmmc2;
+		mmc2 = &sdmmc3;
+		serial0 = &uart4;
+		serial1 = &usart3;
+		serial2 = &usart1;
+	};
+};
+
+&cryp1 {
+	status = "okay";
+};
+
+&dts {
+	status = "okay";
+};
+
+&fmc {
+	status = "disabled";
+};
+
+&gpu {
+	status = "okay";
+};
+
+&i2c4_eeprom {
+	status = "okay";
+};
+
+&i2c4_rtc {
+	status = "okay";
+};
+
+&qspi {
+	status = "okay";
+};
+
+&sdmmc2 {
+	status = "okay";
+};
diff --git a/arch/arm/boot/dts/stm32mp157c-phycore-stm32mp15-som.dtsi b/arch/arm/boot/dts/stm32mp157c-phycore-stm32mp15-som.dtsi
new file mode 100644
index 000000000000..4e8b2d2b30c7
--- /dev/null
+++ b/arch/arm/boot/dts/stm32mp157c-phycore-stm32mp15-som.dtsi
@@ -0,0 +1,577 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/*
+ * Copyright (C) 2022-2023 Steffen Trumtrar <kernel@pengutronix.de>
+ * Copyright (C) Phytec GmbH 2019-2020 - All Rights Reserved
+ * Author: Dom VOVARD <dom.vovard@linrt.com>.
+ */
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/leds/common.h>
+#include <dt-bindings/leds/leds-pca9532.h>
+#include <dt-bindings/mfd/st,stpmic1.h>
+#include <dt-bindings/net/ti-dp83867.h>
+#include "stm32mp15-pinctrl.dtsi"
+
+/ {
+	model = "PHYTEC phyCORE-STM32MP15 SOM";
+	compatible = "phytec,phycore-stm32mp157c-som", "st,stm32mp157";
+
+	aliases {
+		ethernet0 = &ethernet0;
+		rtc0 = &i2c4_rtc;
+		rtc1 = &rtc;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	gpio-keys {
+		compatible = "gpio-keys";
+
+		key-home {
+			label = "Home";
+			gpios = <&gpioa 13 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_HOME>;
+		};
+
+		key-enter {
+			label = "Enter";
+			gpios = <&gpioa 14 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_ENTER>;
+		};
+	};
+
+	reserved-memory {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+
+		retram: retram@38000000 {
+			compatible = "shared-dma-pool";
+			reg = <0x38000000 0x10000>;
+			no-map;
+		};
+
+		mcuram: mcuram@30000000 {
+			compatible = "shared-dma-pool";
+			reg = <0x30000000 0x40000>;
+			no-map;
+		};
+
+		mcuram2: mcuram2@10000000 {
+			compatible = "shared-dma-pool";
+			reg = <0x10000000 0x40000>;
+			no-map;
+		};
+
+		vdev0vring0: vdev0vring0@10040000 {
+			compatible = "shared-dma-pool";
+			reg = <0x10040000 0x1000>;
+			no-map;
+		};
+
+		vdev0vring1: vdev0vring1@10041000 {
+			compatible = "shared-dma-pool";
+			reg = <0x10041000 0x1000>;
+			no-map;
+		};
+
+		vdev0buffer: vdev0buffer@10042000 {
+			compatible = "shared-dma-pool";
+			reg = <0x10042000 0x4000>;
+			no-map;
+		};
+	};
+
+	sound {
+		compatible = "audio-graph-card";
+		label = "STM32MP1-PHYCORE";
+		routing =
+			"Playback", "MCLK", /* Set a route between "MCLK" and "playback" widgets */
+			"Capture", "MCLK";
+		dais = <&sai2b_port>,
+		       <&sai2a_port>;
+	};
+
+	regulator_vin: regulator {
+		compatible = "regulator-fixed";
+		regulator-name = "vin";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		regulator-always-on;
+	};
+};
+
+&ethernet0 {
+	pinctrl-0 = <&ethernet0_rgmii_pins_d>;
+	pinctrl-1 = <&ethernet0_rgmii_sleep_pins_d>;
+	pinctrl-names = "default", "sleep";
+	phy-mode = "rgmii-id";
+	max-speed = <1000>;
+	phy-handle = <&phy0>;
+	st,eth-clk-sel;
+	status = "okay";
+
+	mdio {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		compatible = "snps,dwmac-mdio";
+
+		phy0: ethernet-phy@1 {
+			compatible = "ethernet-phy-ieee802.3-c22";
+			reg = <1>;
+			interrupt-parent = <&gpiog>;
+			interrupts = <12 IRQ_TYPE_EDGE_FALLING>;
+			ti,rx-internal-delay = <DP83867_RGMIIDCTL_2_00_NS>;
+			ti,tx-internal-delay = <DP83867_RGMIIDCTL_2_00_NS>;
+			ti,fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_4_B_NIB>;
+			ti,min-output-impedance;
+			enet-phy-lane-no-swap;
+			ti,clk-output-sel = <DP83867_CLK_O_SEL_OFF>;
+		};
+	};
+};
+
+&i2c1 {
+	pinctrl-names = "default", "sleep";
+	pinctrl-0 = <&i2c1_pins_b>;
+	pinctrl-1 = <&i2c1_sleep_pins_b>;
+	i2c-scl-rising-time-ns = <100>;
+	i2c-scl-falling-time-ns = <7>;
+	status = "okay";
+
+	codec@18 {
+		compatible = "ti,tlv320aic3007";
+		reg = <0x18>;
+		#sound-dai-cells = <0>;
+
+		ai3x-micbias-vg = <2>;
+
+		AVDD-supply = <&v3v3>;
+		IOVDD-supply = <&v3v3>;
+		DRVDD-supply = <&v3v3>;
+		DVDD-supply = <&v1v8_audio>;
+
+		clocks = <&sai2b>;
+
+		port {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			tlv320_tx_endpoint: endpoint@0 {
+				reg = <0>;
+				remote-endpoint = <&sai2b_endpoint>;
+				frame-master;
+				bitclock-master;
+			};
+
+			tlv320_rx_endpoint: endpoint@1 {
+				reg = <1>;
+				remote-endpoint = <&sai2a_endpoint>;
+				frame-master;
+				bitclock-master;
+			};
+		};
+	};
+
+	touch@44 {
+		compatible = "st,stmpe811";
+		reg = <0x44>;
+		interrupts = <3 IRQ_TYPE_EDGE_FALLING>;
+		interrupt-parent = <&gpioi>;
+		vio-supply = <&v3v3>;
+		vcc-supply = <&v3v3>;
+
+		touchscreen {
+			compatible = "st,stmpe-ts";
+			st,sample-time = <4>;
+			st,mod-12b = <1>;
+			st,ref-sel = <0>;
+			st,adc-freq = <1>;
+			st,ave-ctrl = <1>;
+			st,touch-det-delay = <2>;
+			st,settling = <2>;
+			st,fraction-z = <7>;
+			st,i-drive = <1>;
+		};
+	};
+
+	leds@62 {
+		compatible = "nxp,pca9533";
+		reg = <0x62>;
+
+		led-0 {
+			color = <LED_COLOR_ID_RED>;
+			function = LED_FUNCTION_POWER;
+			type = <PCA9532_TYPE_LED>;
+		};
+
+		led-1 {
+			color = <LED_COLOR_ID_GREEN>;
+			function = LED_FUNCTION_POWER;
+			type = <PCA9532_TYPE_LED>;
+		};
+
+		led-2 {
+			color = <LED_COLOR_ID_BLUE>;
+			function = LED_FUNCTION_HEARTBEAT;
+			type = <PCA9532_TYPE_LED>;
+			linux,default-trigger = "heartbeat";
+		};
+	};
+};
+
+&i2c4 {
+	pinctrl-names = "default", "sleep";
+	pinctrl-0 = <&i2c4_pins_a>;
+	pinctrl-1 = <&i2c4_sleep_pins_a>;
+	i2c-scl-rising-time-ns = <185>;
+	i2c-scl-falling-time-ns = <20>;
+	status = "okay";
+
+	pmic@33 {
+		compatible = "st,stpmic1";
+		reg = <0x33>;
+		interrupts-extended = <&gpioa 0 IRQ_TYPE_EDGE_FALLING>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+
+		regulators {
+			compatible = "st,stpmic1-regulators";
+			buck1-supply = <&regulator_vin>;
+			buck2-supply = <&regulator_vin>;
+			buck3-supply = <&regulator_vin>;
+			buck4-supply = <&regulator_vin>;
+			ldo1-supply = <&v3v3>;
+			ldo2-supply = <&v3v3>;
+			ldo3-supply = <&vdd_ddr>;
+			ldo4-supply = <&regulator_vin>;
+			ldo5-supply = <&v3v3>;
+			ldo6-supply = <&v3v3>;
+			boost-supply = <&regulator_vin>;
+			pwr_sw1-supply = <&bst_out>;
+			pwr_sw2-supply = <&bst_out>;
+
+			vddcore: buck1 {
+				regulator-name = "vddcore";
+				regulator-min-microvolt = <1200000>;
+				regulator-max-microvolt = <1350000>;
+				regulator-always-on;
+				regulator-initial-mode = <0>;
+			};
+
+			vdd_ddr: buck2 {
+				regulator-name = "vdd_ddr";
+				regulator-min-microvolt = <1350000>;
+				regulator-max-microvolt = <1350000>;
+				regulator-always-on;
+				regulator-initial-mode = <0>;
+			};
+
+			vdd: buck3 {
+				regulator-name = "vdd";
+				regulator-min-microvolt = <3300000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-always-on;
+				st,mask-reset;
+				regulator-initial-mode = <0>;
+			};
+
+			v3v3: buck4 {
+				regulator-name = "v3v3";
+				regulator-min-microvolt = <3300000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-always-on;
+				regulator-initial-mode = <0>;
+			};
+
+			v1v8_audio: ldo1 {
+				regulator-name = "v1v8_audio";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-always-on;
+				interrupts = <IT_CURLIM_LDO1 0>;
+
+			};
+
+			vdd_eth_2v5: ldo2 {
+				regulator-name = "dd_eth_2v5";
+				regulator-min-microvolt = <2500000>;
+				regulator-max-microvolt = <2500000>;
+				regulator-always-on;
+				interrupts = <IT_CURLIM_LDO2 0>;
+
+			};
+
+			vtt_ddr: ldo3 {
+				regulator-name = "vtt_ddr";
+				regulator-min-microvolt = <500000>;
+				regulator-max-microvolt = <750000>;
+				regulator-always-on;
+				regulator-over-current-protection;
+			};
+
+			vdd_usb: ldo4 {
+				regulator-name = "vdd_usb";
+				interrupts = <IT_CURLIM_LDO4 0>;
+			};
+
+			vdda: ldo5 {
+				regulator-name = "vdda";
+				regulator-min-microvolt = <2900000>;
+				regulator-max-microvolt = <2900000>;
+				interrupts = <IT_CURLIM_LDO5 0>;
+				regulator-boot-on;
+			};
+
+			vdd_eth_1v0: ldo6 {
+				regulator-name = "vdd_eth_1v0";
+				regulator-min-microvolt = <1000000>;
+				regulator-max-microvolt = <1000000>;
+				regulator-always-on;
+				interrupts = <IT_CURLIM_LDO6 0>;
+
+			};
+
+			vref_ddr: vref_ddr {
+				regulator-name = "vref_ddr";
+				regulator-always-on;
+			};
+
+			bst_out: boost {
+				regulator-name = "bst_out";
+				interrupts = <IT_OCP_BOOST 0>;
+			};
+
+			vbus_otg: pwr_sw1 {
+				regulator-name = "vbus_otg";
+				interrupts = <IT_OCP_OTG 0>;
+				regulator-active-discharge = <1>;
+			};
+
+			vbus_sw: pwr_sw2 {
+				regulator-name = "vbus_sw";
+				interrupts = <IT_OCP_SWOUT 0>;
+				regulator-active-discharge = <1>;
+			};
+		};
+
+		onkey {
+			compatible = "st,stpmic1-onkey";
+			interrupts = <IT_PONKEY_F 0>,
+				     <IT_PONKEY_R 0>;
+			interrupt-names = "onkey-falling",
+					  "onkey-rising";
+			power-off-time-sec = <10>;
+		};
+
+		watchdog {
+			compatible = "st,stpmic1-wdt";
+		};
+	};
+
+	i2c4_eeprom: eeprom@50 {
+		compatible = "microchip,24c32",
+			     "atmel,24c32";
+		reg = <0x50>;
+	};
+
+	i2c4_rtc: rtc@52 {
+		compatible = "microcrystal,rv3028";
+		reg = <0x52>;
+	};
+};
+
+&ipcc {
+	status = "okay";
+};
+
+&iwdg2 {
+	timeout-sec = <32>;
+	status = "okay";
+};
+
+&m_can2 {
+	pinctrl-names = "default", "sleep";
+	pinctrl-0 = <&m_can2_pins_a>;
+	pinctrl-1 = <&m_can2_sleep_pins_a>;
+	status = "okay";
+};
+
+&m4_rproc {
+	memory-region = <&retram>, <&mcuram>, <&mcuram2>, <&vdev0vring0>,
+			<&vdev0vring1>, <&vdev0buffer>;
+	mboxes = <&ipcc 0>, <&ipcc 1>, <&ipcc 2>, <&ipcc 3>;
+	mbox-names = "vq0", "vq1", "shutdown", "detach";
+	interrupt-parent = <&exti>;
+	interrupts = <68 1>;
+	status = "okay";
+};
+
+&pwr_regulators {
+	vdd-supply = <&vdd>;
+	vdd_3v3_usbfs-supply = <&vdd_usb>;
+};
+
+&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>;
+	status = "okay";
+
+	flash0: flash@0 {
+		compatible = "winbond,w25q128", "jedec,spi-nor";
+		reg = <0>;
+		spi-rx-bus-width = <4>;
+		spi-max-frequency = <50000000>;
+		m25p,fast-read;
+		#address-cells = <1>;
+		#size-cells = <1>;
+	};
+};
+
+&rng1 {
+	status = "okay";
+};
+
+&rtc {
+	status = "okay";
+};
+
+&sai2 {
+	clocks = <&rcc SAI2>, <&rcc PLL3_Q>, <&rcc PLL3_R>;
+	clock-names = "pclk", "x8k", "x11k";
+	pinctrl-names = "default", "sleep";
+	pinctrl-0 = <&sai2a_pins_b>, <&sai2b_pins_d>;
+	pinctrl-1 = <&sai2a_sleep_pins_b>, <&sai2b_sleep_pins_d>;
+	status = "okay";
+};
+
+&sai2a {
+	dma-names = "rx";
+	st,sync = <&sai2b 2>;
+	clocks = <&rcc SAI2_K>, <&sai2b>;
+	clock-names = "sai_ck", "MCLK";
+	#clock-cells = <0>;
+
+	sai2a_port: port {
+		sai2a_endpoint: endpoint {
+			remote-endpoint = <&tlv320_rx_endpoint>;
+			mclk-fs = <256>;
+			dai-tdm-slot-num = <2>;
+			dai-tdm-slot-width = <16>;
+		};
+	};
+};
+
+&sai2b {
+	dma-names = "tx";
+	#clock-cells = <0>;
+
+	sai2b_port: port {
+		sai2b_endpoint: endpoint {
+			remote-endpoint = <&tlv320_tx_endpoint>;
+			mclk-fs = <256>;
+			dai-tdm-slot-num = <2>;
+			dai-tdm-slot-width = <16>;
+		};
+	};
+};
+
+&sdmmc1 {
+	pinctrl-names = "default", "opendrain", "sleep";
+	pinctrl-0 = <&sdmmc1_b4_pins_b>;
+	pinctrl-1 = <&sdmmc1_b4_od_pins_b>;
+	pinctrl-2 = <&sdmmc1_b4_sleep_pins_b>;
+	cd-gpios = <&gpiof 3 GPIO_ACTIVE_LOW>;
+	disable-wp;
+	st,neg-edge;
+	bus-width = <4>;
+	vmmc-supply = <&v3v3>;
+	status = "okay";
+};
+
+&sdmmc2 {
+	pinctrl-names = "default", "opendrain", "sleep";
+	pinctrl-0 = <&sdmmc2_b4_pins_a &sdmmc2_d47_pins_e>;
+	pinctrl-1 = <&sdmmc2_b4_od_pins_a &sdmmc2_d47_pins_e>;
+	pinctrl-2 = <&sdmmc2_b4_sleep_pins_a &sdmmc2_d47_sleep_pins_e>;
+	non-removable;
+	no-sd;
+	no-sdio;
+	st,neg-edge;
+	bus-width = <8>;
+	vmmc-supply = <&v3v3>;
+	vqmmc-supply = <&v3v3>;
+	mmc-ddr-3_3v;
+};
+
+&spi1 {
+	pinctrl-names = "default", "sleep";
+	pinctrl-0 = <&spi1_pins_a>;
+	pinctrl-1 = <&spi1_sleep_pins_a>;
+	cs-gpios = <&gpioz 3 0>;
+	status = "okay";
+};
+
+&uart4 {
+	pinctrl-names = "default", "sleep", "idle";
+	pinctrl-0 = <&uart4_pins_a>;
+	pinctrl-1 = <&uart4_sleep_pins_a>;
+	pinctrl-2 = <&uart4_idle_pins_a>;
+	pinctrl-3 = <&uart4_pins_a>;
+	/delete-property/dmas;
+	/delete-property/dma-names;
+	status = "okay";
+};
+
+&usart1 {
+	pinctrl-names = "default", "sleep", "idle";
+	pinctrl-0 = <&usart1_pins_b &usart1_pins_a>;
+	pinctrl-1 = <&usart1_sleep_pins_b &usart1_sleep_pins_a>;
+	pinctrl-2 = <&usart1_idle_pins_b &usart1_idle_pins_a>;
+	uart-has-rtscts;
+	status = "okay";
+};
+
+&usart3 {
+	pinctrl-names = "default", "sleep", "idle";
+	pinctrl-0 = <&usart3_pins_a>;
+	pinctrl-1 = <&usart3_sleep_pins_a>;
+	pinctrl-2 = <&usart3_idle_pins_a>;
+	status = "okay";
+};
+
+&usbh_ehci {
+	phys = <&usbphyc_port0>;
+	phy-names = "usb";
+	status = "okay";
+};
+
+&usbh_ohci {
+	phys = <&usbphyc_port0>;
+	phy-names = "usb";
+	status = "okay";
+};
+
+&usbotg_hs {
+	phys = <&usbphyc_port1 0>;
+	phy-names = "usb2-phy";
+	status = "okay";
+};
+
+&usbphyc {
+	status = "okay";
+};
+
+&usbphyc_port0 {
+	phy-supply = <&vdd_usb>;
+};
+
+&usbphyc_port1 {
+	phy-supply = <&vdd_usb>;
+};
diff --git a/arch/arm/boot/dts/stm32mp15xx-dhcom-pdk2.dtsi b/arch/arm/boot/dts/stm32mp15xx-dhcom-pdk2.dtsi
index 4709677151aa..46b87a27d8b3 100644
--- a/arch/arm/boot/dts/stm32mp15xx-dhcom-pdk2.dtsi
+++ b/arch/arm/boot/dts/stm32mp15xx-dhcom-pdk2.dtsi
@@ -137,10 +137,13 @@
 
 	sound {
 		compatible = "audio-graph-card";
-		routing =
-			"MIC_IN", "Capture",
-			"Capture", "Mic Bias",
-			"Playback", "HP_OUT";
+		widgets = "Headphone", "Headphone Jack",
+			  "Line", "Line In Jack",
+			  "Microphone", "Microphone Jack";
+		routing = "Headphone Jack", "HP_OUT",
+			  "LINE_IN", "Line In Jack",
+			  "MIC_IN", "Microphone Jack",
+			  "Microphone Jack", "Mic Bias";
 		dais = <&sai2a_port &sai2b_port>;
 		status = "okay";
 	};
diff --git a/arch/arm/boot/dts/stm32mp15xx-dhcom-som.dtsi b/arch/arm/boot/dts/stm32mp15xx-dhcom-som.dtsi
index c06edd2eacb0..e61df23d361a 100644
--- a/arch/arm/boot/dts/stm32mp15xx-dhcom-som.dtsi
+++ b/arch/arm/boot/dts/stm32mp15xx-dhcom-som.dtsi
@@ -80,17 +80,19 @@
 	vdda-supply = <&vdda>;
 	vref-supply = <&vdda>;
 	status = "okay";
+};
 
-	adc1: adc@0 {
-		st,min-sample-time-nsecs = <5000>;
-		st,adc-channels = <0>;
-		status = "okay";
+&adc1 {
+	channel@0 {
+		reg = <0>;
+		st,min-sample-time-ns = <5000>;
 	};
+};
 
-	adc2: adc@100 {
-		st,adc-channels = <1>;
-		st,min-sample-time-nsecs = <5000>;
-		status = "okay";
+&adc2 {
+	channel@1 {
+		reg = <1>;
+		st,min-sample-time-ns = <5000>;
 	};
 };
 
diff --git a/arch/arm/boot/dts/stm32mp15xx-dhcor-avenger96.dtsi b/arch/arm/boot/dts/stm32mp15xx-dhcor-avenger96.dtsi
index 50af4a27d6be..0069ad75d55e 100644
--- a/arch/arm/boot/dts/stm32mp15xx-dhcor-avenger96.dtsi
+++ b/arch/arm/boot/dts/stm32mp15xx-dhcor-avenger96.dtsi
@@ -87,7 +87,7 @@
 
 	sound {
 		compatible = "audio-graph-card";
-		label = "STM32MP1-AV96-HDMI";
+		label = "STM32-AV96-HDMI";
 		dais = <&sai2a_port>;
 		status = "okay";
 	};
@@ -111,17 +111,39 @@
 	vdda-supply = <&vdda>;
 	vref-supply = <&vdda>;
 	status = "okay";
+};
 
-	adc1: adc@0 {
-		st,adc-channels = <0 1 6>;
-		st,min-sample-time-nsecs = <5000>;
-		status = "okay";
+&adc1 {
+	channel@0 {
+		reg = <0>;
+		st,min-sample-time-ns = <5000>;
 	};
 
-	adc2: adc@100 {
-		st,adc-channels = <0 1 2>;
-		st,min-sample-time-nsecs = <5000>;
-		status = "okay";
+	channel@1 {
+		reg = <1>;
+		st,min-sample-time-ns = <5000>;
+	};
+
+	channel@6 {
+		reg = <6>;
+		st,min-sample-time-ns = <5000>;
+	};
+};
+
+&adc2 {
+	channel@0 {
+		reg = <0>;
+		st,min-sample-time-ns = <5000>;
+	};
+
+	channel@1 {
+		reg = <1>;
+		st,min-sample-time-ns = <5000>;
+	};
+
+	channel@2 {
+		reg = <2>;
+		st,min-sample-time-ns = <5000>;
 	};
 };
 
@@ -321,6 +343,12 @@
 			};
 		};
 	};
+
+	dh_mac_eeprom: eeprom@53 {
+		compatible = "atmel,24c02";
+		reg = <0x53>;
+		pagesize = <16>;
+	};
 };
 
 &ltdc {
@@ -330,11 +358,7 @@
 	status = "okay";
 
 	port {
-		#address-cells = <1>;
-		#size-cells = <0>;
-
-		ltdc_ep0_out: endpoint@0 {
-			reg = <0>;
+		ltdc_ep0_out: endpoint {
 			remote-endpoint = <&adv7513_in>;
 		};
 	};
@@ -452,7 +476,7 @@
 	pinctrl-names = "default", "sleep";
 	pinctrl-0 = <&usart2_pins_a>;
 	pinctrl-1 = <&usart2_sleep_pins_a>;
-	st,hw-flow-ctrl;
+	uart-has-rtscts;
 	/delete-property/dmas;
 	/delete-property/dma-names;
 	status = "okay";
diff --git a/arch/arm/boot/dts/stm32mp15xx-dhcor-drc-compact.dtsi b/arch/arm/boot/dts/stm32mp15xx-dhcor-drc-compact.dtsi
index c32c160f97f2..92d906bfd5d7 100644
--- a/arch/arm/boot/dts/stm32mp15xx-dhcor-drc-compact.dtsi
+++ b/arch/arm/boot/dts/stm32mp15xx-dhcor-drc-compact.dtsi
@@ -57,15 +57,35 @@
 	status = "okay";
 
 	adc1: adc@0 {
-		st,adc-channels = <0 1 6>;
-		st,min-sample-time-nsecs = <5000>;
 		status = "okay";
+		channel@0 {
+			reg = <0>;
+			st,min-sample-time-ns = <5000>;
+		};
+		channel@1 {
+			reg = <1>;
+			st,min-sample-time-ns = <5000>;
+		};
+		channel@6 {
+			reg = <6>;
+			st,min-sample-time-ns = <5000>;
+		};
 	};
 
 	adc2: adc@100 {
-		st,adc-channels = <0 1 2>;
-		st,min-sample-time-nsecs = <5000>;
 		status = "okay";
+		channel@0 {
+			reg = <0>;
+			st,min-sample-time-ns = <5000>;
+		};
+		channel@1 {
+			reg = <1>;
+			st,min-sample-time-ns = <5000>;
+		};
+		channel@2 {
+			reg = <2>;
+			st,min-sample-time-ns = <5000>;
+		};
 	};
 };
 
@@ -192,6 +212,12 @@
 		reg = <0x50>;
 		pagesize = <16>;
 	};
+
+	dh_mac_eeprom: eeprom@53 {
+		compatible = "atmel,24c02";
+		reg = <0x53>;
+		pagesize = <16>;
+	};
 };
 
 &sdmmc1 {	/* MicroSD */
diff --git a/arch/arm/boot/dts/stm32mp15xx-dhcor-som.dtsi b/arch/arm/boot/dts/stm32mp15xx-dhcor-som.dtsi
index bb40fb46da81..bba19f21e527 100644
--- a/arch/arm/boot/dts/stm32mp15xx-dhcor-som.dtsi
+++ b/arch/arm/boot/dts/stm32mp15xx-dhcor-som.dtsi
@@ -213,12 +213,6 @@
 			status = "disabled";
 		};
 	};
-
-	eeprom@53 {
-		compatible = "atmel,24c02";
-		reg = <0x53>;
-		pagesize = <16>;
-	};
 };
 
 &ipcc {
diff --git a/arch/arm/boot/dts/stm32mp15xx-dhcor-testbench.dtsi b/arch/arm/boot/dts/stm32mp15xx-dhcor-testbench.dtsi
index 5fdb74b652ac..ab7f0ba49639 100644
--- a/arch/arm/boot/dts/stm32mp15xx-dhcor-testbench.dtsi
+++ b/arch/arm/boot/dts/stm32mp15xx-dhcor-testbench.dtsi
@@ -41,15 +41,35 @@
 	status = "okay";
 
 	adc1: adc@0 {
-		st,adc-channels = <0 1 6>;
-		st,min-sample-time-nsecs = <5000>;
 		status = "okay";
+		channel@0 {
+			reg = <0>;
+			st,min-sample-time-ns = <5000>;
+		};
+		channel@1 {
+			reg = <1>;
+			st,min-sample-time-ns = <5000>;
+		};
+		channel@6 {
+			reg = <6>;
+			st,min-sample-time-ns = <5000>;
+		};
 	};
 
 	adc2: adc@100 {
-		st,adc-channels = <0 1 2>;
-		st,min-sample-time-nsecs = <5000>;
 		status = "okay";
+		channel@0 {
+			reg = <0>;
+			st,min-sample-time-ns = <5000>;
+		};
+		channel@1 {
+			reg = <1>;
+			st,min-sample-time-ns = <5000>;
+		};
+		channel@2 {
+			reg = <2>;
+			st,min-sample-time-ns = <5000>;
+		};
 	};
 };
 
@@ -90,6 +110,14 @@
 	};
 };
 
+&i2c4 {
+	dh_mac_eeprom: eeprom@53 {
+		compatible = "atmel,24c02";
+		reg = <0x53>;
+		pagesize = <16>;
+	};
+};
+
 &sdmmc1 {
 	pinctrl-names = "default", "opendrain", "sleep";
 	pinctrl-0 = <&sdmmc1_b4_pins_a &sdmmc1_dir_pins_b>;
diff --git a/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi b/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi
index cefeeb00fc22..511113f2e399 100644
--- a/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi
+++ b/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi
@@ -93,28 +93,39 @@
 
 &adc {
 	pinctrl-names = "default";
-	pinctrl-0 = <&adc12_ain_pins_a>, <&adc12_usb_cc_pins_a>;
+	pinctrl-0 = <&adc12_usb_cc_pins_a>;
 	vdd-supply = <&vdd>;
 	vdda-supply = <&vdd>;
 	vref-supply = <&vrefbuf>;
-	status = "disabled";
+	status = "okay";
 	adc1: adc@0 {
+		status = "okay";
 		/*
 		 * Type-C USB_PWR_CC1 & USB_PWR_CC2 on in18 & in19.
 		 * Use at least 5 * RC time, e.g. 5 * (Rp + Rd) * C:
 		 * 5 * (56 + 47kOhms) * 5pF => 2.5us.
 		 * Use arbitrary margin here (e.g. 5us).
 		 */
-		st,min-sample-time-nsecs = <5000>;
-		/* AIN connector, USB Type-C CC1 & CC2 */
-		st,adc-channels = <0 1 6 13 18 19>;
-		status = "okay";
+		channel@18 {
+			reg = <18>;
+			st,min-sample-time-ns = <5000>;
+		};
+		channel@19 {
+			reg = <19>;
+			st,min-sample-time-ns = <5000>;
+		};
 	};
 	adc2: adc@100 {
-		/* AIN connector, USB Type-C CC1 & CC2 */
-		st,adc-channels = <0 1 2 6 18 19>;
-		st,min-sample-time-nsecs = <5000>;
 		status = "okay";
+		/* USB Type-C CC1 & CC2 */
+		channel@18 {
+			reg = <18>;
+			st,min-sample-time-ns = <5000>;
+		};
+		channel@19 {
+			reg = <19>;
+			st,min-sample-time-ns = <5000>;
+		};
 	};
 };
 
@@ -379,21 +390,21 @@
 				regulator-always-on;
 			};
 
-			 bst_out: boost {
+			bst_out: boost {
 				regulator-name = "bst_out";
 				interrupts = <IT_OCP_BOOST 0>;
-			 };
+			};
 
 			vbus_otg: pwr_sw1 {
 				regulator-name = "vbus_otg";
 				interrupts = <IT_OCP_OTG 0>;
-			 };
+			};
 
-			 vbus_sw: pwr_sw2 {
+			vbus_sw: pwr_sw2 {
 				regulator-name = "vbus_sw";
 				interrupts = <IT_OCP_SWOUT 0>;
 				regulator-active-discharge = <1>;
-			 };
+			};
 		};
 
 		onkey {
@@ -435,7 +446,7 @@
 	i2s2_port: port {
 		i2s2_endpoint: endpoint {
 			remote-endpoint = <&sii9022_tx_endpoint>;
-			format = "i2s";
+			dai-format = "i2s";
 			mclk-fs = <256>;
 		};
 	};
@@ -457,8 +468,7 @@
 	status = "okay";
 
 	port {
-		ltdc_ep0_out: endpoint@0 {
-			reg = <0>;
+		ltdc_ep0_out: endpoint {
 			remote-endpoint = <&sii9022_in>;
 		};
 	};
diff --git a/arch/arm64/Kconfig.platforms b/arch/arm64/Kconfig.platforms
index e28dbc477a99..6069120199bb 100644
--- a/arch/arm64/Kconfig.platforms
+++ b/arch/arm64/Kconfig.platforms
@@ -285,6 +285,20 @@ config ARCH_INTEL_SOCFPGA
 	  Stratix 10 (ex. Altera), Stratix10 Software Virtual Platform,
 	  Agilex and eASIC N5X.
 
+config ARCH_STM32
+	bool "STMicroelectronics STM32 SoC Family"
+	select GPIOLIB
+	select PINCTRL
+	select PINCTRL_STM32MP257
+	select ARM_SMC_MBOX
+	select ARM_SCMI_PROTOCOL
+	select COMMON_CLK_SCMI
+	help
+	  This enables support for ARMv8 based STMicroelectronics
+	  STM32 family, including:
+		- STM32MP25:
+			- STM32MP251, STM32MP253, STM32MP255 and STM32MP257.
+
 config ARCH_SYNQUACER
 	bool "Socionext SynQuacer SoC Family"
 	select IRQ_FASTEOI_HIERARCHY_HANDLERS
diff --git a/arch/arm64/boot/dts/Makefile b/arch/arm64/boot/dts/Makefile
index 7b107fa7414b..30dd6347a929 100644
--- a/arch/arm64/boot/dts/Makefile
+++ b/arch/arm64/boot/dts/Makefile
@@ -27,6 +27,7 @@ subdir-y += renesas
 subdir-y += rockchip
 subdir-y += socionext
 subdir-y += sprd
+subdir-y += st
 subdir-y += synaptics
 subdir-y += tesla
 subdir-y += ti
diff --git a/arch/arm64/boot/dts/st/Makefile b/arch/arm64/boot/dts/st/Makefile
new file mode 100644
index 000000000000..881fe1296c58
--- /dev/null
+++ b/arch/arm64/boot/dts/st/Makefile
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+dtb-$(CONFIG_ARCH_STM32) += stm32mp257f-ev1.dtb
diff --git a/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi b/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
new file mode 100644
index 000000000000..d34a1d5e79c0
--- /dev/null
+++ b/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
@@ -0,0 +1,38 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-3-Clause)
+/*
+ * Copyright (C) STMicroelectronics 2023 - All Rights Reserved
+ * Author: Alexandre Torgue <alexandre.torgue@foss.st.com> for STMicroelectronics.
+ */
+#include <dt-bindings/pinctrl/stm32-pinfunc.h>
+
+&pinctrl {
+	usart2_pins_a: usart2-0 {
+		pins1 {
+			pinmux = <STM32_PINMUX('A', 4, AF6)>; /* USART2_TX */
+			bias-disable;
+			drive-push-pull;
+			slew-rate = <0>;
+		};
+		pins2 {
+			pinmux = <STM32_PINMUX('A', 8, AF8)>; /* USART2_RX */
+			bias-disable;
+		};
+	};
+
+	usart2_idle_pins_a: usart2-idle-0 {
+		pins1 {
+			pinmux = <STM32_PINMUX('A', 4, ANALOG)>; /* USART2_TX */
+		};
+		pins2 {
+			pinmux = <STM32_PINMUX('A', 8, AF8)>; /* USART2_RX */
+			bias-disable;
+		};
+	};
+
+	usart2_sleep_pins_a: usart2-sleep-0 {
+		pins {
+			pinmux = <STM32_PINMUX('A', 4, ANALOG)>, /* USART2_TX */
+				 <STM32_PINMUX('A', 8, ANALOG)>; /* USART2_RX */
+		};
+	};
+};
diff --git a/arch/arm64/boot/dts/st/stm32mp251.dtsi b/arch/arm64/boot/dts/st/stm32mp251.dtsi
new file mode 100644
index 000000000000..5268a4321841
--- /dev/null
+++ b/arch/arm64/boot/dts/st/stm32mp251.dtsi
@@ -0,0 +1,279 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-3-Clause)
+/*
+ * Copyright (C) STMicroelectronics 2023 - All Rights Reserved
+ * Author: Alexandre Torgue <alexandre.torgue@foss.st.com> for STMicroelectronics.
+ */
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+
+/ {
+	#address-cells = <2>;
+	#size-cells = <2>;
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		cpu0: cpu@0 {
+			compatible = "arm,cortex-a35";
+			device_type = "cpu";
+			reg = <0>;
+			enable-method = "psci";
+		};
+	};
+
+	arm-pmu {
+		compatible = "arm,cortex-a35-pmu";
+		interrupts = <GIC_SPI 368 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-affinity = <&cpu0>;
+		interrupt-parent = <&intc>;
+	};
+
+	clocks {
+		ck_flexgen_08: ck-flexgen-08 {
+			#clock-cells = <0>;
+			compatible = "fixed-clock";
+			clock-frequency = <100000000>;
+		};
+
+		ck_flexgen_51: ck-flexgen-51 {
+			#clock-cells = <0>;
+			compatible = "fixed-clock";
+			clock-frequency = <200000000>;
+		};
+
+		ck_icn_ls_mcu: ck-icn-ls-mcu {
+			#clock-cells = <0>;
+			compatible = "fixed-clock";
+			clock-frequency = <200000000>;
+		};
+	};
+
+	firmware {
+		optee {
+			compatible = "linaro,optee-tz";
+			method = "smc";
+		};
+
+		scmi {
+			compatible = "linaro,scmi-optee";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			linaro,optee-channel-id = <0>;
+
+			scmi_clk: protocol@14 {
+				reg = <0x14>;
+				#clock-cells = <1>;
+			};
+
+			scmi_reset: protocol@16 {
+				reg = <0x16>;
+				#reset-cells = <1>;
+			};
+		};
+	};
+
+	intc: interrupt-controller@4ac00000 {
+		compatible = "arm,cortex-a7-gic";
+		#interrupt-cells = <3>;
+		#address-cells = <1>;
+		interrupt-controller;
+		reg = <0x0 0x4ac10000 0x0 0x1000>,
+		      <0x0 0x4ac20000 0x0 0x2000>,
+		      <0x0 0x4ac40000 0x0 0x2000>,
+		      <0x0 0x4ac60000 0x0 0x2000>;
+	};
+
+	psci {
+		compatible = "arm,psci-1.0";
+		method = "smc";
+	};
+
+	timer {
+		compatible = "arm,armv8-timer";
+		interrupt-parent = <&intc>;
+		interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
+			     <GIC_PPI 14 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
+			     <GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
+			     <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>;
+		always-on;
+	};
+
+	soc@0 {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		interrupt-parent = <&intc>;
+		ranges = <0x0 0x0 0x0 0x80000000>;
+
+		rifsc: rifsc-bus@42080000 {
+			compatible = "simple-bus";
+			reg = <0x42080000 0x1000>;
+			#address-cells = <1>;
+			#size-cells = <1>;
+			ranges;
+
+			usart2: serial@400e0000 {
+				compatible = "st,stm32h7-uart";
+				reg = <0x400e0000 0x400>;
+				interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&ck_flexgen_08>;
+				status = "disabled";
+			};
+		};
+
+		syscfg: syscon@44230000 {
+			compatible = "st,stm32mp25-syscfg", "syscon";
+			reg = <0x44230000 0x10000>;
+		};
+
+		pinctrl: pinctrl@44240000 {
+			#address-cells = <1>;
+			#size-cells = <1>;
+			compatible = "st,stm32mp257-pinctrl";
+			ranges = <0 0x44240000 0xa0400>;
+			pins-are-numbered;
+
+			gpioa: gpio@44240000 {
+				gpio-controller;
+				#gpio-cells = <2>;
+				interrupt-controller;
+				#interrupt-cells = <2>;
+				reg = <0x0 0x400>;
+				clocks = <&ck_icn_ls_mcu>;
+				st,bank-name = "GPIOA";
+				status = "disabled";
+			};
+
+			gpiob: gpio@44250000 {
+				gpio-controller;
+				#gpio-cells = <2>;
+				interrupt-controller;
+				#interrupt-cells = <2>;
+				reg = <0x10000 0x400>;
+				clocks = <&ck_icn_ls_mcu>;
+				st,bank-name = "GPIOB";
+				status = "disabled";
+			};
+
+			gpioc: gpio@44260000 {
+				gpio-controller;
+				#gpio-cells = <2>;
+				interrupt-controller;
+				#interrupt-cells = <2>;
+				reg = <0x20000 0x400>;
+				clocks = <&ck_icn_ls_mcu>;
+				st,bank-name = "GPIOC";
+				status = "disabled";
+			};
+
+			gpiod: gpio@44270000 {
+				gpio-controller;
+				#gpio-cells = <2>;
+				interrupt-controller;
+				#interrupt-cells = <2>;
+				reg = <0x30000 0x400>;
+				clocks = <&ck_icn_ls_mcu>;
+				st,bank-name = "GPIOD";
+				status = "disabled";
+			};
+
+			gpioe: gpio@44280000 {
+				gpio-controller;
+				#gpio-cells = <2>;
+				interrupt-controller;
+				#interrupt-cells = <2>;
+				reg = <0x40000 0x400>;
+				clocks = <&ck_icn_ls_mcu>;
+				st,bank-name = "GPIOE";
+				status = "disabled";
+			};
+
+			gpiof: gpio@44290000 {
+				gpio-controller;
+				#gpio-cells = <2>;
+				interrupt-controller;
+				#interrupt-cells = <2>;
+				reg = <0x50000 0x400>;
+				clocks = <&ck_icn_ls_mcu>;
+				st,bank-name = "GPIOF";
+				status = "disabled";
+			};
+
+			gpiog: gpio@442a0000 {
+				gpio-controller;
+				#gpio-cells = <2>;
+				interrupt-controller;
+				#interrupt-cells = <2>;
+				reg = <0x60000 0x400>;
+				clocks = <&ck_icn_ls_mcu>;
+				st,bank-name = "GPIOG";
+				status = "disabled";
+			};
+
+			gpioh: gpio@442b0000 {
+				gpio-controller;
+				#gpio-cells = <2>;
+				interrupt-controller;
+				#interrupt-cells = <2>;
+				reg = <0x70000 0x400>;
+				clocks = <&ck_icn_ls_mcu>;
+				st,bank-name = "GPIOH";
+				status = "disabled";
+			};
+
+			gpioi: gpio@442c0000 {
+				gpio-controller;
+				#gpio-cells = <2>;
+				interrupt-controller;
+				#interrupt-cells = <2>;
+				reg = <0x80000 0x400>;
+				clocks = <&ck_icn_ls_mcu>;
+				st,bank-name = "GPIOI";
+				status = "disabled";
+			};
+
+			gpioj: gpio@442d0000 {
+				gpio-controller;
+				#gpio-cells = <2>;
+				interrupt-controller;
+				#interrupt-cells = <2>;
+				reg = <0x90000 0x400>;
+				clocks = <&ck_icn_ls_mcu>;
+				st,bank-name = "GPIOJ";
+				status = "disabled";
+			};
+
+			gpiok: gpio@442e0000 {
+				gpio-controller;
+				#gpio-cells = <2>;
+				interrupt-controller;
+				#interrupt-cells = <2>;
+				reg = <0xa0000 0x400>;
+				clocks = <&ck_icn_ls_mcu>;
+				st,bank-name = "GPIOK";
+				status = "disabled";
+			};
+		};
+
+		pinctrl_z: pinctrl@46200000 {
+			#address-cells = <1>;
+			#size-cells = <1>;
+			compatible = "st,stm32mp257-z-pinctrl";
+			ranges = <0 0x46200000 0x400>;
+			pins-are-numbered;
+
+			gpioz: gpio@46200000 {
+				gpio-controller;
+				#gpio-cells = <2>;
+				interrupt-controller;
+				#interrupt-cells = <2>;
+				reg = <0 0x400>;
+				clocks = <&ck_icn_ls_mcu>;
+				st,bank-name = "GPIOZ";
+				st,bank-ioport = <11>;
+				status = "disabled";
+			};
+
+		};
+	};
+};
diff --git a/arch/arm64/boot/dts/st/stm32mp253.dtsi b/arch/arm64/boot/dts/st/stm32mp253.dtsi
new file mode 100644
index 000000000000..af48e82efe8a
--- /dev/null
+++ b/arch/arm64/boot/dts/st/stm32mp253.dtsi
@@ -0,0 +1,23 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-3-Clause)
+/*
+ * Copyright (C) STMicroelectronics 2023 - All Rights Reserved
+ * Author: Alexandre Torgue <alexandre.torgue@foss.st.com> for STMicroelectronics.
+ */
+#include "stm32mp251.dtsi"
+
+/ {
+	cpus {
+		cpu1: cpu@1 {
+			compatible = "arm,cortex-a35";
+			device_type = "cpu";
+			reg = <1>;
+			enable-method = "psci";
+		};
+	};
+
+	arm-pmu {
+		interrupts = <GIC_SPI 368 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 369 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-affinity = <&cpu0>, <&cpu1>;
+	};
+};
diff --git a/arch/arm64/boot/dts/st/stm32mp255.dtsi b/arch/arm64/boot/dts/st/stm32mp255.dtsi
new file mode 100644
index 000000000000..e6fa596211f5
--- /dev/null
+++ b/arch/arm64/boot/dts/st/stm32mp255.dtsi
@@ -0,0 +1,9 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-3-Clause)
+/*
+ * Copyright (C) STMicroelectronics 2023 - All Rights Reserved
+ * Author: Alexandre Torgue <alexandre.torgue@foss.st.com> for STMicroelectronics.
+ */
+#include "stm32mp253.dtsi"
+
+/ {
+};
diff --git a/arch/arm64/boot/dts/st/stm32mp257.dtsi b/arch/arm64/boot/dts/st/stm32mp257.dtsi
new file mode 100644
index 000000000000..5c5000d3d9db
--- /dev/null
+++ b/arch/arm64/boot/dts/st/stm32mp257.dtsi
@@ -0,0 +1,9 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-3-Clause)
+/*
+ * Copyright (C) STMicroelectronics 2023 - All Rights Reserved
+ * Author: Alexandre Torgue <alexandre.torgue@foss.st.com> for STMicroelectronics.
+ */
+#include "stm32mp255.dtsi"
+
+/ {
+};
diff --git a/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts b/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts
new file mode 100644
index 000000000000..39b4726cc098
--- /dev/null
+++ b/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts
@@ -0,0 +1,50 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-3-Clause)
+/*
+ * Copyright (C) STMicroelectronics 2023 - All Rights Reserved
+ * Author: Alexandre Torgue <alexandre.torgue@foss.st.com> for STMicroelectronics.
+ */
+
+/dts-v1/;
+
+#include "stm32mp257.dtsi"
+#include "stm32mp25xf.dtsi"
+#include "stm32mp25-pinctrl.dtsi"
+#include "stm32mp25xxai-pinctrl.dtsi"
+
+/ {
+	model = "STMicroelectronics STM32MP257F-EV1 Evaluation Board";
+	compatible = "st,stm32mp257f-ev1", "st,stm32mp257";
+
+	aliases {
+		serial0 = &usart2;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	memory@80000000 {
+		device_type = "memory";
+		reg = <0x0 0x80000000 0x1 0x0>;
+	};
+
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		fw@80000000 {
+			compatible = "shared-dma-pool";
+			reg = <0x0 0x80000000 0x0 0x4000000>;
+			no-map;
+		};
+	};
+};
+
+&usart2 {
+	pinctrl-names = "default", "idle", "sleep";
+	pinctrl-0 = <&usart2_pins_a>;
+	pinctrl-1 = <&usart2_idle_pins_a>;
+	pinctrl-2 = <&usart2_sleep_pins_a>;
+	status = "okay";
+};
diff --git a/arch/arm64/boot/dts/st/stm32mp25xc.dtsi b/arch/arm64/boot/dts/st/stm32mp25xc.dtsi
new file mode 100644
index 000000000000..5e83a6926485
--- /dev/null
+++ b/arch/arm64/boot/dts/st/stm32mp25xc.dtsi
@@ -0,0 +1,8 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-3-Clause)
+/*
+ * Copyright (C) STMicroelectronics 2023 - All Rights Reserved
+ * Author: Alexandre Torgue <alexandre.torgue@foss.st.com> for STMicroelectronics.
+ */
+
+/ {
+};
diff --git a/arch/arm64/boot/dts/st/stm32mp25xf.dtsi b/arch/arm64/boot/dts/st/stm32mp25xf.dtsi
new file mode 100644
index 000000000000..5e83a6926485
--- /dev/null
+++ b/arch/arm64/boot/dts/st/stm32mp25xf.dtsi
@@ -0,0 +1,8 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-3-Clause)
+/*
+ * Copyright (C) STMicroelectronics 2023 - All Rights Reserved
+ * Author: Alexandre Torgue <alexandre.torgue@foss.st.com> for STMicroelectronics.
+ */
+
+/ {
+};
diff --git a/arch/arm64/boot/dts/st/stm32mp25xxai-pinctrl.dtsi b/arch/arm64/boot/dts/st/stm32mp25xxai-pinctrl.dtsi
new file mode 100644
index 000000000000..abdbc7aebc7f
--- /dev/null
+++ b/arch/arm64/boot/dts/st/stm32mp25xxai-pinctrl.dtsi
@@ -0,0 +1,83 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-3-Clause)
+/*
+ * Copyright (C) STMicroelectronics 2023 - All Rights Reserved
+ * Author: Alexandre Torgue <alexandre.torgue@foss.st.com> for STMicroelectronics.
+ */
+
+&pinctrl {
+	st,package = <STM32MP_PKG_AI>;
+
+	gpioa: gpio@44240000 {
+		status = "okay";
+		ngpios = <16>;
+		gpio-ranges = <&pinctrl 0 0 16>;
+	};
+
+	gpiob: gpio@44250000 {
+		status = "okay";
+		ngpios = <16>;
+		gpio-ranges = <&pinctrl 0 16 16>;
+	};
+
+	gpioc: gpio@44260000 {
+		status = "okay";
+		ngpios = <14>;
+		gpio-ranges = <&pinctrl 0 32 14>;
+	};
+
+	gpiod: gpio@44270000 {
+		status = "okay";
+		ngpios = <16>;
+		gpio-ranges = <&pinctrl 0 48 16>;
+	};
+
+	gpioe: gpio@44280000 {
+		status = "okay";
+		ngpios = <16>;
+		gpio-ranges = <&pinctrl 0 64 16>;
+	};
+
+	gpiof: gpio@44290000 {
+		status = "okay";
+		ngpios = <16>;
+		gpio-ranges = <&pinctrl 0 80 16>;
+	};
+
+	gpiog: gpio@442a0000 {
+		status = "okay";
+		ngpios = <16>;
+		gpio-ranges = <&pinctrl 0 96 16>;
+	};
+
+	gpioh: gpio@442b0000 {
+		status = "okay";
+		ngpios = <12>;
+		gpio-ranges = <&pinctrl 2 114 12>;
+	};
+
+	gpioi: gpio@442c0000 {
+		status = "okay";
+		ngpios = <16>;
+		gpio-ranges = <&pinctrl 0 128 16>;
+	};
+
+	gpioj: gpio@442d0000 {
+		status = "okay";
+		ngpios = <16>;
+		gpio-ranges = <&pinctrl 0 144 16>;
+	};
+
+	gpiok: gpio@442e0000 {
+		status = "okay";
+		ngpios = <8>;
+		gpio-ranges = <&pinctrl 0 160 8>;
+	};
+};
+
+&pinctrl_z {
+	gpioz: gpio@46200000 {
+		status = "okay";
+		ngpios = <10>;
+		gpio-ranges = <&pinctrl_z 0 400 10>;
+	};
+};
diff --git a/arch/arm64/boot/dts/st/stm32mp25xxak-pinctrl.dtsi b/arch/arm64/boot/dts/st/stm32mp25xxak-pinctrl.dtsi
new file mode 100644
index 000000000000..2e0d4d349d14
--- /dev/null
+++ b/arch/arm64/boot/dts/st/stm32mp25xxak-pinctrl.dtsi
@@ -0,0 +1,71 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-3-Clause)
+/*
+ * Copyright (C) STMicroelectronics 2023 - All Rights Reserved
+ * Author: Alexandre Torgue <alexandre.torgue@foss.st.com> for STMicroelectronics.
+ */
+
+&pinctrl {
+	st,package = <STM32MP_PKG_AK>;
+
+	gpioa: gpio@44240000 {
+		status = "okay";
+		ngpios = <16>;
+		gpio-ranges = <&pinctrl 0 0 16>;
+	};
+
+	gpiob: gpio@44250000 {
+		status = "okay";
+		ngpios = <16>;
+		gpio-ranges = <&pinctrl 0 16 16>;
+	};
+
+	gpioc: gpio@44260000 {
+		status = "okay";
+		ngpios = <14>;
+		gpio-ranges = <&pinctrl 0 32 14>;
+	};
+
+	gpiod: gpio@44270000 {
+		status = "okay";
+		ngpios = <16>;
+		gpio-ranges = <&pinctrl 0 48 16>;
+	};
+
+	gpioe: gpio@44280000 {
+		status = "okay";
+		ngpios = <16>;
+		gpio-ranges = <&pinctrl 0 64 16>;
+	};
+
+	gpiof: gpio@44290000 {
+		status = "okay";
+		ngpios = <16>;
+		gpio-ranges = <&pinctrl 0 80 16>;
+	};
+
+	gpiog: gpio@442a0000 {
+		status = "okay";
+		ngpios = <16>;
+		gpio-ranges = <&pinctrl 0 96 16>;
+	};
+
+	gpioh: gpio@442b0000 {
+		status = "okay";
+		ngpios = <12>;
+		gpio-ranges = <&pinctrl 2 114 12>;
+	};
+
+	gpioi: gpio@442c0000 {
+		status = "okay";
+		ngpios = <12>;
+		gpio-ranges = <&pinctrl 0 128 12>;
+	};
+};
+
+&pinctrl_z {
+	gpioz: gpio@46200000 {
+		status = "okay";
+		ngpios = <10>;
+		gpio-ranges = <&pinctrl_z 0 400 10>;
+	};
+};
diff --git a/arch/arm64/boot/dts/st/stm32mp25xxal-pinctrl.dtsi b/arch/arm64/boot/dts/st/stm32mp25xxal-pinctrl.dtsi
new file mode 100644
index 000000000000..2406e972554c
--- /dev/null
+++ b/arch/arm64/boot/dts/st/stm32mp25xxal-pinctrl.dtsi
@@ -0,0 +1,71 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-3-Clause)
+/*
+ * Copyright (C) STMicroelectronics 2023 - All Rights Reserved
+ * Author: Alexandre Torgue <alexandre.torgue@foss.st.com> for STMicroelectronics.
+ */
+
+&pinctrl {
+	st,package = <STM32MP_PKG_AL>;
+
+	gpioa: gpio@44240000 {
+		status = "okay";
+		ngpios = <16>;
+		gpio-ranges = <&pinctrl 0 0 16>;
+	};
+
+	gpiob: gpio@44250000 {
+		status = "okay";
+		ngpios = <16>;
+		gpio-ranges = <&pinctrl 0 16 16>;
+	};
+
+	gpioc: gpio@44260000 {
+		status = "okay";
+		ngpios = <14>;
+		gpio-ranges = <&pinctrl 0 32 14>;
+	};
+
+	gpiod: gpio@44270000 {
+		status = "okay";
+		ngpios = <16>;
+		gpio-ranges = <&pinctrl 0 48 16>;
+	};
+
+	gpioe: gpio@44280000 {
+		status = "okay";
+		ngpios = <16>;
+		gpio-ranges = <&pinctrl 0 64 16>;
+	};
+
+	gpiof: gpio@44290000 {
+		status = "okay";
+		ngpios = <16>;
+		gpio-ranges = <&pinctrl 0 80 16>;
+	};
+
+	gpiog: gpio@442a0000 {
+		status = "okay";
+		ngpios = <16>;
+		gpio-ranges = <&pinctrl 0 96 16>;
+	};
+
+	gpioh: gpio@442b0000 {
+		status = "okay";
+		ngpios = <12>;
+		gpio-ranges = <&pinctrl 2 114 12>;
+	};
+
+	gpioi: gpio@442c0000 {
+		status = "okay";
+		ngpios = <12>;
+		gpio-ranges = <&pinctrl 0 128 12>;
+	};
+};
+
+&pinctrl_z {
+	gpioz: gpio@46200000 {
+		status = "okay";
+		ngpios = <10>;
+		gpio-ranges = <&pinctrl_z 0 400 10>;
+	};
+};
diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index 0ee572753f1a..4968feb2812c 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -59,6 +59,7 @@ CONFIG_ARCH_RENESAS=y
 CONFIG_ARCH_ROCKCHIP=y
 CONFIG_ARCH_SEATTLE=y
 CONFIG_ARCH_INTEL_SOCFPGA=y
+CONFIG_ARCH_STM32=y
 CONFIG_ARCH_SYNQUACER=y
 CONFIG_ARCH_TEGRA=y
 CONFIG_ARCH_TESLA_FSD=y
@@ -462,6 +463,8 @@ CONFIG_SERIAL_FSL_LPUART=y
 CONFIG_SERIAL_FSL_LPUART_CONSOLE=y
 CONFIG_SERIAL_FSL_LINFLEXUART=y
 CONFIG_SERIAL_FSL_LINFLEXUART_CONSOLE=y
+CONFIG_SERIAL_STM32=y
+CONFIG_SERIAL_STM32_CONSOLE=y
 CONFIG_SERIAL_MVEBU_UART=y
 CONFIG_SERIAL_OWL=y
 CONFIG_SERIAL_DEV_BUS=y