[PATCH v2 00/15] arm64: support Engicam MicroGEA-STM32MP257-RMM board

[PATCH v2 00/15] arm64: support Engicam MicroGEA-STM32MP257-RMM board

[Dario Binacchi]

This series adds initial support for the Engicam MicroGEA-STM32MP257-RMM
board based on the MicroGEA-STM32MP257 SoM.

The support includes device tree descriptions for both the SoM and the
carrier board, together with the required pinctrl definitions for the
peripherals used.

The series also updates the arm64 defconfig accordingly.

Notes:
Following Arnd's guidance [1], patch 14/15 "arm64: defconfig: cleanup the
defconfig" is kept in this series purely for review purposes. Since a better
version of this change has already been merged via Krzysztof's cleanups,
this patch will be skipped once the review is complete.

[1] https://lore.kernel.org/all/3e23b0c6-6968-4c87-8d34-f44b8af1df82@app.fastmail.com/

Changes in v2:
- Add Acked-by of Conor Dooley for patch 0/1 "dt-bindings: arm: stm32:
  support Engicam MicroGEA-STM32MP257-RMM board"
- Add resets property to dts CAN node. Suggested by Sashiko.
- Drop the clocks property from the sai1 node in stm32mp257-engicam-microgea-rmm.dts
  to avoid overriding the peripheral bus clock reference defined in the base
  SoC device tree. Suggested by Sashiko.
- Reference the existing labeled nodes directly at the root level using
  &sai1a and &sai1b in stm32mp257-engicam-microgea-rmm.dts instead of
  redefining the entire node structure and redeclaring the labels. Suggested by Sashiko.
- Drop the #clock-cells property from sai1a and remove the reference to sai1a from
  the clocks array in sai1b, relying strictly on the st,sync property to handle
  internal synchronization.

Dario Binacchi (15):
  dt-bindings: arm: stm32: support Engicam MicroGEA-STM32MP257-RMM board
  arm64: dts: st: add SDMMC2 support on stm32mp25
  arm64: dts: st: add CAN1 support on stm32mp25
  arm64: dts: st: add i2c1 pins for stm32mp25
  arm64: dts: st: add ltdc pins for stm32mp25
  arm64: dts: st: add can1 pins for stm32mp25
  arm64: dts: st: add pwm2/pwm4 pins for stm32mp25
  arm64: dts: st: add sai1 pins for stm32mp25
  arm64: dts: st: add sdmmc2 pins for stm32mp25
  arm64: dts: st: add spi1 pins for stm32mp25
  arm64: dts: st: add usart1 pins for stm32mp25
  arm64: dts: st: support Engicam MicroGEA-STM32MP257 SoM
  arm64: dts: st: support Engicam MicroGEA-STM32MP257-RMM board
  arm64: defconfig: cleanup the defconfig
  arm64: defconfig: enable configs for Engicam MicroGEA-STM32MP257-RMM

 .../devicetree/bindings/arm/stm32/stm32.yaml  |   7 +
 arch/arm64/boot/dts/st/Makefile               |   1 +
 arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi | 328 ++++++++++++++++++
 arch/arm64/boot/dts/st/stm32mp251.dtsi        |  15 +
 arch/arm64/boot/dts/st/stm32mp253.dtsi        |  16 +
 .../st/stm32mp257-engicam-microgea-rmm.dts    | 319 +++++++++++++++++
 .../dts/st/stm32mp257-engicam-microgea.dtsi   |  64 ++++
 arch/arm64/configs/defconfig                  | 293 ++++++----------
 8 files changed, 861 insertions(+), 182 deletions(-)
 create mode 100644 arch/arm64/boot/dts/st/stm32mp257-engicam-microgea-rmm.dts
 create mode 100644 arch/arm64/boot/dts/st/stm32mp257-engicam-microgea.dtsi

-- 
2.43.0

base-commit: 8fde5d1d47f69db6082dfa34500c27f8485389a5
branch: stm32mp257d-microgea

[PATCH v2 01/15] dt-bindings: arm: stm32: support Engicam MicroGEA-STM32MP257-RMM board

[Dario Binacchi]

Add devicetree bindings for Engicam MicroGEA-STM32MP257-RMM board based
on the Engicam MicroGEA-STM32MP257 SoM (System-on-Module).

The use of an enum for a single element is justified by the future
addition of other boards based on the same SoM.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>

---

Changes in v2:
- Add Acked-by of Conor Dooley for patch 0/1 "dt-bindings: arm: stm32:
  support Engicam MicroGEA-STM32MP257-RMM board"

 Documentation/devicetree/bindings/arm/stm32/stm32.yaml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/arm/stm32/stm32.yaml b/Documentation/devicetree/bindings/arm/stm32/stm32.yaml
index c6af3a46364f..c5ce81e3ce45 100644
--- a/Documentation/devicetree/bindings/arm/stm32/stm32.yaml
+++ b/Documentation/devicetree/bindings/arm/stm32/stm32.yaml
@@ -203,6 +203,13 @@ properties:
               - st,stm32mp257f-ev1
           - const: st,stm32mp257
 
+      - description: Engicam MicroGEA STM32MP257 SoM based Boards
+        items:
+          - enum:
+              - engicam,microgea-stm32mp257-rmm
+          - const: engicam,microgea-stm32mp257
+          - const: st,stm32mp257
+
       - description: ST STM32MP235 based Boards
         items:
           - enum:
-- 
2.43.0

[PATCH v2 02/15] arm64: dts: st: add SDMMC2 support on stm32mp25

[Dario Binacchi]

The SDMMC2 controller supports SD cards, eMMC memories and SDIO devices.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
---

(no changes since v1)

 arch/arm64/boot/dts/st/stm32mp251.dtsi | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/arch/arm64/boot/dts/st/stm32mp251.dtsi b/arch/arm64/boot/dts/st/stm32mp251.dtsi
index 673fbc5632e6..5e46024d2215 100644
--- a/arch/arm64/boot/dts/st/stm32mp251.dtsi
+++ b/arch/arm64/boot/dts/st/stm32mp251.dtsi
@@ -1667,6 +1667,21 @@ sdmmc1: mmc@48220000 {
 				status = "disabled";
 			};
 
+			sdmmc2: mmc@48230000 {
+				compatible = "st,stm32mp25-sdmmc2", "arm,pl18x", "arm,primecell";
+				arm,primecell-periphid = <0x00353180>;
+				reg = <0x48230000 0x400>, <0x44230800 0x8>;
+				interrupts = <GIC_SPI 197 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&rcc CK_KER_SDMMC2>;
+				clock-names = "apb_pclk";
+				resets = <&rcc SDMMC2_R>;
+				cap-sd-highspeed;
+				cap-mmc-highspeed;
+				max-frequency = <120000000>;
+				access-controllers = <&rifsc 77>;
+				status = "disabled";
+			};
+
 			ethernet1: ethernet@482c0000 {
 				compatible = "st,stm32mp25-dwmac", "snps,dwmac-5.20";
 				reg = <0x482c0000 0x4000>;
-- 
2.43.0

Re: [PATCH v2 02/15] arm64: dts: st: add SDMMC2 support on stm32mp25

[sashiko-bot]

Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [Medium] The `power-domains` property is missing from the `sdmmc2` node.
--

commit 4ee314c8f9ee08a9bd17b8a43369159b8e1356d6
Author: Dario Binacchi <dario.binacchi@amarulasolutions.com>

arm64: dts: st: add SDMMC2 support on stm32mp25

The SDMMC2 controller supports SD cards, eMMC memories and SDIO devices.

> diff --git a/arch/arm64/boot/dts/st/stm32mp251.dtsi b/arch/arm64/boot/dts/st/stm32mp251.dtsi
> index 673fbc5632e69..5e46024d22152 100644
> --- a/arch/arm64/boot/dts/st/stm32mp251.dtsi
> +++ b/arch/arm64/boot/dts/st/stm32mp251.dtsi
> @@ -1667,6 +1667,21 @@ sdmmc1: mmc@48220000 {
>  				status = "disabled";
>  			};
>  
> +			sdmmc2: mmc@48230000 {
> +				compatible = "st,stm32mp25-sdmmc2", "arm,pl18x", "arm,primecell";
> +				arm,primecell-periphid = <0x00353180>;
> +				reg = <0x48230000 0x400>, <0x44230800 0x8>;
> +				interrupts = <GIC_SPI 197 IRQ_TYPE_LEVEL_HIGH>;
> +				clocks = <&rcc CK_KER_SDMMC2>;
> +				clock-names = "apb_pclk";
> +				resets = <&rcc SDMMC2_R>;
> +				cap-sd-highspeed;
> +				cap-mmc-highspeed;
> +				max-frequency = <120000000>;
> +				access-controllers = <&rifsc 77>;

[Severity: Medium]
Should this node include a power-domains property?

On the STM32MP25 SoC, peripheral IP blocks are linked to the cluster power
domain. For example, other nodes in the same file use:

    power-domains = <&CLUSTER_PD>;

Looking at the git history, the sdmmc1 node was added early in SoC bringup
before power domains were systematically added to other peripherals.

While the sdmmc1 node is currently missing this property as well, does the
absence of it here cause a regression with runtime power management and
sleep state transitions for the new sdmmc2 controller?

> +				status = "disabled";
> +			};

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260529144707.3931919-1-dario.binacchi@amarulasolutions.com?part=2

[PATCH v2 03/15] arm64: dts: st: add CAN1 support on stm32mp25

[Dario Binacchi]

The controller is compliant with ISO 11898-1: 2015 (CAN protocol
specification version 2.0 part A, B) and CAN FD protocol specification
version 1.0.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>

---

Changes in v2:
- Add resets property to dts CAN node. Suggested by Sashiko.

 arch/arm64/boot/dts/st/stm32mp253.dtsi | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/arm64/boot/dts/st/stm32mp253.dtsi b/arch/arm64/boot/dts/st/stm32mp253.dtsi
index eeceb086252b..7e82f01fdc10 100644
--- a/arch/arm64/boot/dts/st/stm32mp253.dtsi
+++ b/arch/arm64/boot/dts/st/stm32mp253.dtsi
@@ -43,6 +43,22 @@ &optee {
 };
 
 &rifsc {
+	m_can1: can@402d0000 {
+		compatible = "bosch,m_can";
+		reg = <0x402d0000 0x400>, <0x40310000 0xd50>;
+		reg-names = "m_can", "message_ram";
+		interrupts = <GIC_SPI 91 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 94 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-names = "int0", "int1";
+		clocks = <&rcc CK_BUS_FDCAN>, <&rcc CK_KER_FDCAN>;
+		clock-names = "hclk", "cclk";
+		resets = <&rcc FDCAN_R>;
+		bosch,mram-cfg = <0x0 0 0 32 0 0 2 2>;
+		access-controllers = <&rifsc 56>;
+		power-domains = <&CLUSTER_PD>;
+		status = "disabled";
+	};
+
 	ethernet2: ethernet@482d0000 {
 		compatible = "st,stm32mp25-dwmac", "snps,dwmac-5.20";
 		reg = <0x482d0000 0x4000>;
-- 
2.43.0

[PATCH v2 04/15] arm64: dts: st: add i2c1 pins for stm32mp25

[Dario Binacchi]

Add the i2c1 pins used on MicroGEA-STM32MP257-RMM board.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
---

(no changes since v1)

 arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi b/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
index 456ece7f8ebc..db485b9ed904 100644
--- a/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
+++ b/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
@@ -203,6 +203,25 @@ pins {
 		};
 	};
 
+	/omit-if-no-ref/
+	i2c1_pins_a: i2c1-0 {
+		pins {
+			pinmux = <STM32_PINMUX('G', 13, AF9)>, /* I2C1_SCL */
+				 <STM32_PINMUX('A', 2, AF10)>; /* I2C1_SDA */
+			bias-disable;
+			drive-open-drain;
+			slew-rate = <0>;
+		};
+	};
+
+	/omit-if-no-ref/
+	i2c1_sleep_pins_a: i2c1-sleep-0 {
+		pins {
+			pinmux = <STM32_PINMUX('G', 13, ANALOG)>, /* I2C1_SCL */
+				 <STM32_PINMUX('A', 2, ANALOG)>; /* I2C1_SDA */
+		};
+	};
+
 	/omit-if-no-ref/
 	i2c2_pins_a: i2c2-0 {
 		pins {
-- 
2.43.0

[PATCH v2 05/15] arm64: dts: st: add ltdc pins for stm32mp25

[Dario Binacchi]

Add the LTDC pins used on MicroGEA-STM32MP257-RMM board.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
---

(no changes since v1)

 arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi | 71 +++++++++++++++++++
 1 file changed, 71 insertions(+)

diff --git a/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi b/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
index db485b9ed904..05bd07a0a561 100644
--- a/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
+++ b/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
@@ -260,6 +260,77 @@ pins {
 		};
 	};
 
+	/omit-if-no-ref/
+	ltdc_pins_a: ltdc-0 {
+		pins {
+			pinmux = <STM32_PINMUX('C',  6, AF14)>, /* LCD_CLK */
+				 <STM32_PINMUX('G',  2, AF13)>, /* LCD_HSYNC */
+				 <STM32_PINMUX('G',  1, AF13)>, /* LCD_VSYNC */
+				 <STM32_PINMUX('C',  5, AF14)>, /* LCD_DE */
+				 <STM32_PINMUX('H',  4, AF10)>, /* LCD_R0 */
+				 <STM32_PINMUX('F',  7, AF13)>, /* LCD_R1 */
+				 <STM32_PINMUX('C', 11, AF13)>, /* LCD_R2 */
+				 <STM32_PINMUX('A',  1, AF11)>, /* LCD_R3 */
+				 <STM32_PINMUX('B', 15, AF13)>, /* LCD_R4 */
+				 <STM32_PINMUX('G',  3, AF13)>, /* LCD_R5 */
+				 <STM32_PINMUX('A', 10, AF12)>, /* LCD_R6 */
+				 <STM32_PINMUX('G',  7, AF13)>, /* LCD_R7 */
+				 <STM32_PINMUX('F',  8, AF13)>, /* LCD_G0 */
+				 <STM32_PINMUX('H',  5, AF10)>, /* LCD_G1 */
+				 <STM32_PINMUX('C',  9, AF13)>, /* LCD_G2 */
+				 <STM32_PINMUX('C', 10, AF13)>, /* LCD_G3 */
+				 <STM32_PINMUX('A',  6, AF10)>, /* LCD_G4 */
+				 <STM32_PINMUX('G', 11, AF13)>, /* LCD_G5 */
+				 <STM32_PINMUX('G', 12, AF13)>, /* LCD_G6 */
+				 <STM32_PINMUX('A',  9, AF12)>, /* LCD_G7 */
+				 <STM32_PINMUX('F',  6, AF13)>, /* LCD_B0 */
+				 <STM32_PINMUX('A',  3, AF11)>, /* LCD_B1 */
+				 <STM32_PINMUX('G', 15, AF13)>, /* LCD_B2 */
+				 <STM32_PINMUX('I',  0, AF13)>, /* LCD_B3 */
+				 <STM32_PINMUX('I',  1, AF13)>, /* LCD_B4 */
+				 <STM32_PINMUX('A',  7, AF10)>, /* LCD_B5 */
+				 <STM32_PINMUX('F',  5, AF13)>, /* LCD_B6 */
+				 <STM32_PINMUX('I',  4, AF13)>; /* LCD_B7 */
+			bias-disable;
+			drive-push-pull;
+			slew-rate = <0>;
+		};
+	};
+
+	/omit-if-no-ref/
+	ltdc_sleep_pins_a: ltdc-sleep-0 {
+		pins {
+			pinmux = <STM32_PINMUX('C',  6, ANALOG)>, /* LCD_CLK */
+				 <STM32_PINMUX('G',  2, ANALOG)>, /* LCD_HSYNC */
+				 <STM32_PINMUX('G',  1, ANALOG)>, /* LCD_VSYNC */
+				 <STM32_PINMUX('C',  5, ANALOG)>, /* LCD_DE */
+				 <STM32_PINMUX('H',  4, ANALOG)>, /* LCD_R0 */
+				 <STM32_PINMUX('F',  7, ANALOG)>, /* LCD_R1 */
+				 <STM32_PINMUX('C', 11, ANALOG)>, /* LCD_R2 */
+				 <STM32_PINMUX('A',  1, ANALOG)>, /* LCD_R3 */
+				 <STM32_PINMUX('B', 15, ANALOG)>, /* LCD_R4 */
+				 <STM32_PINMUX('G',  3, ANALOG)>, /* LCD_R5 */
+				 <STM32_PINMUX('A', 10, ANALOG)>, /* LCD_R6 */
+				 <STM32_PINMUX('G',  7, ANALOG)>, /* LCD_R7 */
+				 <STM32_PINMUX('F',  8, ANALOG)>, /* LCD_G0 */
+				 <STM32_PINMUX('H',  5, ANALOG)>, /* LCD_G1 */
+				 <STM32_PINMUX('C',  9, ANALOG)>, /* LCD_G2 */
+				 <STM32_PINMUX('C', 10, ANALOG)>, /* LCD_G3 */
+				 <STM32_PINMUX('A',  6, ANALOG)>, /* LCD_G4 */
+				 <STM32_PINMUX('G', 11, ANALOG)>, /* LCD_G5 */
+				 <STM32_PINMUX('G', 12, ANALOG)>, /* LCD_G6 */
+				 <STM32_PINMUX('A',  9, ANALOG)>, /* LCD_G7 */
+				 <STM32_PINMUX('F',  6, ANALOG)>, /* LCD_B0 */
+				 <STM32_PINMUX('A',  3, ANALOG)>, /* LCD_B1 */
+				 <STM32_PINMUX('G', 15, ANALOG)>, /* LCD_B2 */
+				 <STM32_PINMUX('I',  0, ANALOG)>, /* LCD_B3 */
+				 <STM32_PINMUX('I',  1, ANALOG)>, /* LCD_B4 */
+				 <STM32_PINMUX('A',  7, ANALOG)>, /* LCD_B5 */
+				 <STM32_PINMUX('F',  5, ANALOG)>, /* LCD_B6 */
+				 <STM32_PINMUX('I',  4, ANALOG)>; /* LCD_B7 */
+		};
+	};
+
 	/omit-if-no-ref/
 	ospi_port1_clk_pins_a: ospi-port1-clk-0 {
 		pins {
-- 
2.43.0

[PATCH v2 06/15] arm64: dts: st: add can1 pins for stm32mp25

[Dario Binacchi]

Add the can1 pins used on MicroGEA-STM32MP257-RMM board.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
---

(no changes since v1)

 arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi b/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
index 05bd07a0a561..4be01a6574c7 100644
--- a/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
+++ b/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
@@ -331,6 +331,28 @@ pins {
 		};
 	};
 
+	/omit-if-no-ref/
+	m_can1_pins_a: m-can1-0 {
+		pins1 {
+			pinmux = <STM32_PINMUX('B', 9, AF7)>; /* CAN1_TX */
+			slew-rate = <1>;
+			drive-push-pull;
+			bias-disable;
+		};
+		pins2 {
+			pinmux = <STM32_PINMUX('B', 11, AF7)>; /* CAN1_RX */
+			bias-disable;
+		};
+	};
+
+	/omit-if-no-ref/
+	m_can1_sleep_pins_a: m-can1-sleep-0 {
+		pins {
+			pinmux = <STM32_PINMUX('B', 9, ANALOG)>, /* CAN1_TX */
+				 <STM32_PINMUX('B', 11, ANALOG)>; /* CAN1_RX */
+		};
+	};
+
 	/omit-if-no-ref/
 	ospi_port1_clk_pins_a: ospi-port1-clk-0 {
 		pins {
-- 
2.43.0

[PATCH v2 07/15] arm64: dts: st: add pwm2/pwm4 pins for stm32mp25

[Dario Binacchi]

Add the pwm2 and pwm4 pins used on MicroGEA-STM32MP257-RMM board.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
---

(no changes since v1)

 arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi | 34 +++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi b/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
index 4be01a6574c7..eab8ebe71660 100644
--- a/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
+++ b/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
@@ -433,6 +433,23 @@ pins {
 		};
 	};
 
+	/omit-if-no-ref/
+	pwm2_pins_a: pwm2-0 {
+		pins {
+			pinmux = <STM32_PINMUX('I', 7, AF7)>; /* TIM2_CH1 */
+			bias-pull-down;
+			drive-push-pull;
+			slew-rate = <0>;
+		};
+	};
+
+	/omit-if-no-ref/
+	pwm2_sleep_pins_a: pwm2-sleep-0 {
+		pins {
+			pinmux = <STM32_PINMUX('I', 7, ANALOG)>; /* TIM2_CH1 */
+		};
+	};
+
 	/omit-if-no-ref/
 	pwm3_pins_a: pwm3-0 {
 		pins {
@@ -450,6 +467,23 @@ pins {
 		};
 	};
 
+	/omit-if-no-ref/
+	pwm4_pins_a: pwm4-0 {
+		pins {
+			pinmux = <STM32_PINMUX('A', 12, AF7)>; /* TIM4_CH1 */
+			bias-pull-down;
+			drive-push-pull;
+			slew-rate = <0>;
+		};
+	};
+
+	/omit-if-no-ref/
+	pwm4_sleep_pins_a: pwm4-sleep-0 {
+		pins {
+			pinmux = <STM32_PINMUX('A', 12, ANALOG)>; /* TIM4_CH1 */
+		};
+	};
+
 	/omit-if-no-ref/
 	pwm8_pins_a: pwm8-0 {
 		pins {
-- 
2.43.0

[PATCH v2 08/15] arm64: dts: st: add sai1 pins for stm32mp25

[Dario Binacchi]

Add the sai1 pins used on MicroGEA-STM32MP257-RMM board.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
---

(no changes since v1)

 arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi | 45 +++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi b/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
index eab8ebe71660..ab1e62cf2bfc 100644
--- a/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
+++ b/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
@@ -520,6 +520,51 @@ pins {
 		};
 	};
 
+	/omit-if-no-ref/
+	sai1a_pins_a: sai1a-0 {
+		pins1 {
+			pinmux = <STM32_PINMUX('D', 9, AF3)>, /* SAI1_SD_A */
+				 <STM32_PINMUX('D', 8, AF3)>, /* SAI1_FS_A */
+				 <STM32_PINMUX('D', 10, AF3)>; /* SAI1_SCK_A */
+			bias-disable;
+			drive-push-pull;
+			slew-rate = <1>;
+		};
+		pins2 {
+			pinmux = <STM32_PINMUX('D', 11, AF3)>; /* SAI1_MCLK_A */
+			bias-disable;
+			drive-push-pull;
+			slew-rate = <2>;
+		};
+	};
+
+	/omit-if-no-ref/
+	sai1a_sleep_pins_a: sai1a-sleep-0 {
+		pins {
+			pinmux = <STM32_PINMUX('D', 9, ANALOG)>, /* SAI1_SD_A */
+				 <STM32_PINMUX('D', 8, ANALOG)>, /* SAI1_FS_A */
+				 <STM32_PINMUX('D', 10, ANALOG)>, /* SAI1_SCK_A */
+				 <STM32_PINMUX('D', 11, ANALOG)>; /* SAI1_MCLK_A */
+		};
+	};
+
+	/omit-if-no-ref/
+	sai1b_pins_a: sai1b-0 {
+		pins {
+			pinmux = <STM32_PINMUX('D', 4, AF4)>; /* SAI1_SD_B */
+			bias-disable;
+			drive-push-pull;
+			slew-rate = <0>;
+		};
+	};
+
+	/omit-if-no-ref/
+	sai1b_sleep_pins_a: sai1b-sleep-0 {
+		pins {
+			pinmux = <STM32_PINMUX('D', 4, ANALOG)>; /* SAI1_SD_B */
+		};
+	};
+
 	/omit-if-no-ref/
 	sdmmc1_b4_pins_a: sdmmc1-b4-0 {
 		pins1 {
-- 
2.43.0

[PATCH v2 09/15] arm64: dts: st: add sdmmc2 pins for stm32mp25

[Dario Binacchi]

Add the sdmmc2 pins used on MicroGEA-STM32MP257-RMM board.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
---

(no changes since v1)

 arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi | 80 +++++++++++++++++++
 1 file changed, 80 insertions(+)

diff --git a/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi b/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
index ab1e62cf2bfc..62f898a55d45 100644
--- a/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
+++ b/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
@@ -622,6 +622,86 @@ pins {
 		};
 	};
 
+	/omit-if-no-ref/
+	sdmmc2_b4_pins_a: sdmmc2-b4-0 {
+		pins1 {
+			pinmux = <STM32_PINMUX('E', 13, AF12)>, /* SDMMC2_D0 */
+				 <STM32_PINMUX('E', 11, AF12)>, /* SDMMC2_D1 */
+				 <STM32_PINMUX('E', 8, AF12)>, /* SDMMC2_D2 */
+				 <STM32_PINMUX('E', 12, AF12)>, /* SDMMC2_D3 */
+				 <STM32_PINMUX('E', 15, AF12)>; /* SDMMC2_CMD */
+			slew-rate = <1>;
+			drive-push-pull;
+			bias-pull-up;
+		};
+		pins2 {
+			pinmux = <STM32_PINMUX('E', 14, AF12)>; /* SDMMC2_CK */
+			slew-rate = <2>;
+			drive-push-pull;
+			bias-pull-up;
+		};
+	};
+
+	/omit-if-no-ref/
+	sdmmc2_b4_od_pins_a: sdmmc2-b4-od-0 {
+		pins1 {
+			pinmux = <STM32_PINMUX('E', 13, AF12)>, /* SDMMC2_D0 */
+				 <STM32_PINMUX('E', 11, AF12)>, /* SDMMC2_D1 */
+				 <STM32_PINMUX('E', 8, AF12)>, /* SDMMC2_D2 */
+				 <STM32_PINMUX('E', 12, AF12)>; /* SDMMC2_D3 */
+			slew-rate = <1>;
+			drive-push-pull;
+			bias-pull-up;
+		};
+		pins2 {
+			pinmux = <STM32_PINMUX('E', 14, AF12)>; /* SDMMC2_CK */
+			slew-rate = <2>;
+			drive-push-pull;
+			bias-pull-up;
+		};
+		pins3 {
+			pinmux = <STM32_PINMUX('E', 15, AF12)>; /* SDMMC2_CMD */
+			slew-rate = <1>;
+			drive-open-drain;
+			bias-pull-up;
+		};
+	};
+
+	/omit-if-no-ref/
+	sdmmc2_b4_sleep_pins_a: sdmmc2-b4-sleep-0 {
+		pins {
+			pinmux = <STM32_PINMUX('E', 13, ANALOG)>, /* SDMMC2_D0 */
+				 <STM32_PINMUX('E', 11, ANALOG)>, /* SDMMC2_D1 */
+				 <STM32_PINMUX('E', 8, ANALOG)>, /* SDMMC2_D2 */
+				 <STM32_PINMUX('E', 12, ANALOG)>, /* SDMMC2_D3 */
+				 <STM32_PINMUX('E', 14, ANALOG)>, /* SDMMC2_CK */
+				 <STM32_PINMUX('E', 15, ANALOG)>; /* SDMMC2_CMD */
+		};
+	};
+
+	/omit-if-no-ref/
+	sdmmc2_d47_pins_a: sdmmc2-d47-0 {
+		pins {
+			pinmux = <STM32_PINMUX('E', 10, AF12)>, /* SDMMC2_D4 */
+				 <STM32_PINMUX('E', 9, AF12)>, /* SDMMC2_D5 */
+				 <STM32_PINMUX('E', 6, AF12)>, /* SDMMC2_D6 */
+				 <STM32_PINMUX('E', 7, AF12)>; /* SDMMC2_D7 */
+			slew-rate = <1>;
+			drive-push-pull;
+			bias-pull-up;
+		};
+	};
+
+	/omit-if-no-ref/
+	sdmmc2_d47_sleep_pins_a: sdmmc2-d47-sleep-0 {
+		pins {
+			pinmux = <STM32_PINMUX('E', 10, ANALOG)>, /* SDMMC2_D4 */
+				 <STM32_PINMUX('E', 9, ANALOG)>, /* SDMMC2_D5 */
+				 <STM32_PINMUX('E', 6, ANALOG)>, /* SDMMC2_D6 */
+				 <STM32_PINMUX('E', 7, ANALOG)>; /* SDMMC2_D7 */
+		};
+	};
+
 	/omit-if-no-ref/
 	spi3_pins_a: spi3-0 {
 		pins1 {
-- 
2.43.0

[PATCH v2 10/15] arm64: dts: st: add spi1 pins for stm32mp25

[Dario Binacchi]

Add the spi1 pins used on MicroGEA-STM32MP257-RMM board.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
---

(no changes since v1)

 arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi | 24 +++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi b/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
index 62f898a55d45..46c5197dcd63 100644
--- a/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
+++ b/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
@@ -702,6 +702,30 @@ pins {
 		};
 	};
 
+	/omit-if-no-ref/
+	spi1_pins_a: spi1-0 {
+		pins1 {
+			pinmux = <STM32_PINMUX('G', 6, AF3)>, /* SPI1_SCK */
+				 <STM32_PINMUX('I', 5, AF3)>; /* SPI1_MOSI */
+			drive-push-pull;
+			bias-disable;
+			slew-rate = <1>;
+		};
+		pins2 {
+			pinmux = <STM32_PINMUX('F', 12, AF3)>; /* SPI1_MISO */
+			bias-disable;
+		};
+	};
+
+	/omit-if-no-ref/
+	spi1_sleep_pins_a: spi1-sleep-0 {
+		pins1 {
+			pinmux = <STM32_PINMUX('G', 6, ANALOG)>, /* SPI1_SCK */
+				 <STM32_PINMUX('I', 5, ANALOG)>, /* SPI1_MOSI */
+				 <STM32_PINMUX('F', 12, ANALOG)>; /* SPI1_MISO */
+		};
+	};
+
 	/omit-if-no-ref/
 	spi3_pins_a: spi3-0 {
 		pins1 {
-- 
2.43.0

[PATCH v2 11/15] arm64: dts: st: add usart1 pins for stm32mp25

[Dario Binacchi]

Add the usart1 pins used on MicroGEA-STM32MP257-RMM board.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
---

(no changes since v1)

 arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi | 33 +++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi b/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
index 46c5197dcd63..a72c458b2c6e 100644
--- a/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
+++ b/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
@@ -766,6 +766,39 @@ pins {
 		};
 	};
 
+	/omit-if-no-ref/
+	usart1_pins_b: usart1-1 {
+		pins1 {
+			pinmux = <STM32_PINMUX('B', 8, AF6)>; /* USART1_TX */
+			bias-disable;
+			drive-push-pull;
+			slew-rate = <0>;
+		};
+		pins2 {
+			pinmux = <STM32_PINMUX('B', 10, AF6)>; /* USART1_RX */
+			bias-disable;
+		};
+	};
+
+	/omit-if-no-ref/
+	usart1_idle_pins_b: usart1-idle-1 {
+		pins1 {
+			pinmux = <STM32_PINMUX('B', 8, ANALOG)>; /* USART1_TX */
+		};
+		pins2 {
+			pinmux = <STM32_PINMUX('B', 10, AF6)>; /* USART1_RX */
+			bias-disable;
+		};
+	};
+
+	/omit-if-no-ref/
+	usart1_sleep_pins_b: usart1-sleep-1 {
+		pins {
+			pinmux = <STM32_PINMUX('B', 8, ANALOG)>, /* USART1_TX */
+				 <STM32_PINMUX('B', 10, ANALOG)>; /* USART1_RX */
+		};
+	};
+
 	/omit-if-no-ref/
 	usart2_pins_a: usart2-0 {
 		pins1 {
-- 
2.43.0

[PATCH v2 12/15] arm64: dts: st: support Engicam MicroGEA-STM32MP257 SoM

[Dario Binacchi]

Support Engicam MicroGEA-STM32MP257 SoM with:

 - 8 GB eMMC Flash
 - 2 GB LPDDR4 DRAM

The SoM also provides an Ethernet MAC, but Ethernet support is not
enabled at this stage due to a known silicon limitation documented in
[1].

This corresponds to section 2.21.2 ("ETH1 RMII mode could have CRC
errors"), where CRC errors may occur in ETH1 RMII direct mode when
directly connected to I/Os.

The workaround requires use of the Ethernet switch (ETHSW), which
introduces additional DT bindings and topology complexity. This is
intended to be addressed in a separate patch series.

[1] https://www.st.com/resource/en/errata_sheet/es0598-stm32mp23xx25xx-device-errata-stmicroelectronics.pd
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
---

(no changes since v1)

 .../dts/st/stm32mp257-engicam-microgea.dtsi   | 64 +++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 arch/arm64/boot/dts/st/stm32mp257-engicam-microgea.dtsi

diff --git a/arch/arm64/boot/dts/st/stm32mp257-engicam-microgea.dtsi b/arch/arm64/boot/dts/st/stm32mp257-engicam-microgea.dtsi
new file mode 100644
index 000000000000..67be66cd1930
--- /dev/null
+++ b/arch/arm64/boot/dts/st/stm32mp257-engicam-microgea.dtsi
@@ -0,0 +1,64 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2026 Amarula Solutions, Dario Binacchi <dario.binacchi@amarulasolutions.com>
+ * Copyright (C) 2026 Engicam srl
+ */
+
+/dts-v1/;
+
+#include <dt-bindings/regulator/st,stm32mp25-regulator.h>
+#include "stm32mp257.dtsi"
+#include "stm32mp25xf.dtsi"
+#include "stm32mp25-pinctrl.dtsi"
+#include "stm32mp25xxai-pinctrl.dtsi"
+
+/ {
+	model = "Engicam MicroGEA STM32MP257 SoM";
+	compatible = "engicam,microgea-stm32mp257", "st,stm32mp257";
+
+	memory@80000000 {
+		device_type = "memory";
+		reg = <0x0 0x80000000 0x0 0x80000000>;
+	};
+};
+
+&scmi_regu {
+	scmi_vddio1: regulator@0 {
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+	};
+	scmi_vddcore: regulator@b {
+		reg = <VOLTD_SCMI_STPMIC2_BUCK2>;
+		regulator-name = "vddcore";
+	};
+	scmi_v1v8: regulator@e {
+		reg = <VOLTD_SCMI_STPMIC2_BUCK5>;
+		regulator-name = "v1v8";
+	};
+	scmi_v3v3: regulator@10 {
+		reg = <VOLTD_SCMI_STPMIC2_BUCK7>;
+		regulator-name = "v3v3";
+	};
+	scmi_vdd3v3_usb: regulator@14 {
+		reg = <VOLTD_SCMI_STPMIC2_LDO4>;
+		regulator-name = "vdd3v3_usb";
+	};
+};
+
+/* eMMC */
+&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>;
+	non-removable;
+	no-sd;
+	no-sdio;
+	st,neg-edge;
+	bus-width = <8>;
+	vmmc-supply = <&scmi_v3v3>;
+	vqmmc-supply = <&scmi_vddio2>;
+	mmc-ddr-1_8v;
+	mmc-hs200-1_8v;
+	status = "okay";
+};
-- 
2.43.0

[PATCH v2 13/15] arm64: dts: st: support Engicam MicroGEA-STM32MP257-RMM board

[Dario Binacchi]

Support for Engicam MicroGEA-STM32MP257-RMM board with:

 - 8 GB eMMC Flash
 - 2 GB LPDDR4 DRAM
 - CAN
 - LEDs
 - LCD panel with touchscreen
 - Micro SD card connector
 - Audio codec
 - Buzzer

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>

---

Changes in v2:
- Drop the clocks property from the sai1 node in stm32mp257-engicam-microgea-rmm.dts
  to avoid overriding the peripheral bus clock reference defined in the base
  SoC device tree. Suggested by Sashiko.
- Reference the existing labeled nodes directly at the root level using
  &sai1a and &sai1b in stm32mp257-engicam-microgea-rmm.dts instead of
  redefining the entire node structure and redeclaring the labels. Suggested by Sashiko.
- Drop the #clock-cells property from sai1a and remove the reference to sai1a from
  the clocks array in sai1b, relying strictly on the st,sync property to handle
  internal synchronization.

 arch/arm64/boot/dts/st/Makefile               |   1 +
 .../st/stm32mp257-engicam-microgea-rmm.dts    | 319 ++++++++++++++++++
 2 files changed, 320 insertions(+)
 create mode 100644 arch/arm64/boot/dts/st/stm32mp257-engicam-microgea-rmm.dts

diff --git a/arch/arm64/boot/dts/st/Makefile b/arch/arm64/boot/dts/st/Makefile
index 63908113ae36..386eca593c54 100644
--- a/arch/arm64/boot/dts/st/Makefile
+++ b/arch/arm64/boot/dts/st/Makefile
@@ -2,5 +2,6 @@
 dtb-$(CONFIG_ARCH_STM32) += \
 	stm32mp215f-dk.dtb \
 	stm32mp235f-dk.dtb \
+	stm32mp257-engicam-microgea-rmm.dtb \
 	stm32mp257f-dk.dtb \
 	stm32mp257f-ev1.dtb
diff --git a/arch/arm64/boot/dts/st/stm32mp257-engicam-microgea-rmm.dts b/arch/arm64/boot/dts/st/stm32mp257-engicam-microgea-rmm.dts
new file mode 100644
index 000000000000..0212c03aae1a
--- /dev/null
+++ b/arch/arm64/boot/dts/st/stm32mp257-engicam-microgea-rmm.dts
@@ -0,0 +1,319 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2026 Amarula Solutions, Dario Binacchi <dario.binacchi@amarulasolutions.com>
+ * Copyright (C) 2026 Engicam srl
+ */
+
+/dts-v1/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/leds/common.h>
+
+#include "stm32mp257-engicam-microgea.dtsi"
+
+/ {
+	model = "Engicam MicroGEA STM32MP257D RMM Board";
+	compatible = "engicam,microgea-stm32mp257-rmm",
+		     "engicam,microgea-stm32mp257", "st,stm32mp257";
+
+	aliases {
+		mmc0 = &sdmmc1;
+		mmc1 = &sdmmc2;
+		serial0 = &usart2;
+		serial1 = &usart1;
+	};
+
+	backlight: backlight {
+		compatible = "pwm-backlight";
+		brightness-levels = <0 100>;
+		num-interpolated-steps = <100>;
+		default-brightness-level = <85>;
+		pwms = <&pwm2 0 100000 0>;
+	};
+
+	buzzer {
+		compatible = "pwm-beeper";
+		pwms = <&pwm4 0 1000000 0>;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		framebuffer {
+			compatible = "simple-framebuffer";
+			clocks = <&rcc CK_BUS_LTDC>, <&rcc CK_KER_LTDC>;
+			lcd-supply = <&reg_3v3>;
+			status = "disabled";
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led-0 {
+			gpios = <&gpioh 2 GPIO_ACTIVE_HIGH>;
+			default-state = "off";
+			status = "okay";
+		};
+
+		led-1 {
+			gpios = <&gpioh 6 GPIO_ACTIVE_HIGH>;
+			default-state = "off";
+			status = "okay";
+		};
+	};
+
+	mclk: clock-mclk {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <24000000>;
+	};
+
+	reg_1v8: regulator-1v8 {
+		compatible = "regulator-fixed";
+		regulator-name = "1v8";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+	};
+
+	reg_3v3: regulator-3v3 {
+		compatible = "regulator-fixed";
+		regulator-name = "3v3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+	};
+
+	reg_ext_pwr: regulator-ext-pwr {
+		compatible = "regulator-fixed";
+		regulator-name = "ext-pwr";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		gpio = <&gpiog 0 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+		regulator-always-on;
+	};
+
+	sound {
+		compatible = "audio-graph-card";
+		label = "STM32MP25-RMM";
+		widgets = "Headphone", "Headphone Jack",
+			  "Microphone", "Microphone Jack";
+		routing = "Headphone Jack", "HP_OUT",
+			  "MIC_IN", "Microphone Jack",
+			  "Microphone Jack", "Mic Bias";
+		dais = <&sai1a_port &sai1b_port>;
+		status = "okay";
+	};
+};
+
+&arm_wdt {
+	timeout-sec = <32>;
+	status = "okay";
+};
+
+&i2c1 {
+	pinctrl-names = "default", "sleep";
+	pinctrl-0 = <&i2c1_pins_a>;
+	pinctrl-1 = <&i2c1_sleep_pins_a>;
+	i2c-scl-rising-time-ns = <185>;
+	i2c-scl-falling-time-ns = <20>;
+	status = "okay";
+	/* spare dmas for other usage */
+	/delete-property/dmas;
+	/delete-property/dma-names;
+
+	touchscreen@38 {
+		compatible = "edt,edt-ft5306";
+		reg = <0x38>;
+		interrupt-parent = <&gpiob>;
+		interrupts = <0 IRQ_TYPE_EDGE_FALLING>;
+		reset-gpios = <&gpiod 1 GPIO_ACTIVE_LOW>;
+		touchscreen-size-x = <1280>;
+		touchscreen-size-y = <800>;
+	};
+};
+
+&i2c2 {
+	pinctrl-names = "default", "sleep";
+	pinctrl-0 = <&i2c2_pins_a>;
+	pinctrl-1 = <&i2c2_sleep_pins_a>;
+	i2c-scl-rising-time-ns = <185>;
+	i2c-scl-falling-time-ns = <20>;
+	status = "okay";
+	/* spare dmas for other usage */
+	/delete-property/dmas;
+	/delete-property/dma-names;
+
+	sgtl5000: codec@a {
+		compatible = "fsl,sgtl5000";
+		reg = <0x0a>;
+		#sound-dai-cells = <0>;
+		clocks = <&mclk>;
+
+		VDDA-supply = <&reg_3v3>;
+		VDDIO-supply = <&reg_3v3>;
+		VDDD-supply = <&reg_1v8>;
+
+		sgtl5000_port: port {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			sgtl5000_tx_endpoint: endpoint@0 {
+				reg = <0>;
+				remote-endpoint = <&sai1a_endpoint>;
+				frame-master = <&sgtl5000_tx_endpoint>;
+				bitclock-master = <&sgtl5000_tx_endpoint>;
+			};
+
+			sgtl5000_rx_endpoint: endpoint@1 {
+				reg = <1>;
+				remote-endpoint = <&sai1b_endpoint>;
+				frame-master = <&sgtl5000_rx_endpoint>;
+				bitclock-master = <&sgtl5000_rx_endpoint>;
+			};
+		};
+	};
+};
+
+&ltdc {
+	pinctrl-names = "default", "sleep";
+	pinctrl-0 = <&ltdc_pins_a>;
+	pinctrl-1 = <&ltdc_sleep_pins_a>;
+	status = "okay";
+
+	port {
+		ltdc_out: endpoint {
+			remote-endpoint = <&panel_in>;
+		};
+	};
+};
+
+&m_can1 {
+	pinctrl-names = "default", "sleep";
+	pinctrl-0 = <&m_can1_pins_a>;
+	pinctrl-1 = <&m_can1_sleep_pins_a>;
+	status = "okay";
+};
+
+&sai1 {
+	pinctrl-names = "default", "sleep";
+	pinctrl-0 = <&sai1a_pins_a>, <&sai1b_pins_a>;
+	pinctrl-1 = <&sai1a_sleep_pins_a>, <&sai1b_sleep_pins_a>;
+	status = "okay";
+};
+
+&sai1a {
+	dma-names = "tx";
+	status = "okay";
+
+	sai1a_port: port {
+		sai1a_endpoint: endpoint {
+			remote-endpoint = <&sgtl5000_tx_endpoint>;
+			dai-format = "i2s";
+			mclk-fs = <512>;
+		};
+	};
+};
+
+&sai1b {
+	dma-names = "rx";
+	st,sync = <&sai1a 2>;
+	clocks = <&rcc CK_KER_SAI1>;
+	clock-names = "sai_ck";
+	status = "okay";
+
+	sai1b_port: port {
+		sai1b_endpoint: endpoint {
+			remote-endpoint = <&sgtl5000_rx_endpoint>;
+			dai-format = "i2s";
+			mclk-fs = <512>;
+		};
+	};
+};
+
+/* MicroSD */
+&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>;
+	broken-cd;
+	disable-wp;
+	st,neg-edge;
+	bus-width = <4>;
+	vmmc-supply = <&scmi_v3v3>;
+	vqmmc-supply = <&scmi_vddio1>;
+	no-1-8-v;
+	status = "okay";
+};
+
+&spi1 {
+	pinctrl-names = "default", "sleep";
+	pinctrl-0 = <&spi1_pins_a>;
+	pinctrl-1 = <&spi1_sleep_pins_a>;
+	#address-cells = <1>;
+	#size-cells = <0>;
+	cs-gpios = <&gpioh 8 GPIO_ACTIVE_HIGH>, <&gpioh 3 GPIO_ACTIVE_HIGH>;
+	status = "okay";
+
+	display: display@0 {
+		compatible = "rocktech,rk050hr345-ct106a", "ilitek,ili9806e";
+		reg = <0>;
+		vdd-supply = <&reg_3v3>;
+		spi-max-frequency = <10000000>;
+		reset-gpios = <&gpiob 6 GPIO_ACTIVE_LOW>;
+		backlight = <&backlight>;
+
+		port {
+			panel_in: endpoint {
+				remote-endpoint = <&ltdc_out>;
+			};
+		};
+	};
+};
+
+&timers2 {
+	status = "okay";
+
+	pwm2: pwm {
+		pinctrl-0 = <&pwm2_pins_a>;
+		pinctrl-1 = <&pwm2_sleep_pins_a>;
+		pinctrl-names = "default", "sleep";
+		status = "okay";
+	};
+};
+
+&timers4 {
+	status = "okay";
+
+	pwm4: pwm {
+		pinctrl-names = "default", "sleep";
+		pinctrl-0 = <&pwm4_pins_a>;
+		pinctrl-1 = <&pwm4_sleep_pins_a>;
+		status = "okay";
+	};
+};
+
+&usart1 {
+	pinctrl-names = "default", "idle", "sleep";
+	pinctrl-0 = <&usart1_pins_b>;
+	pinctrl-1 = <&usart1_idle_pins_b>;
+	pinctrl-2 = <&usart1_sleep_pins_b>;
+	/delete-property/ dmas;
+	/delete-property/ dma-names;
+	status = "okay";
+};
+
+&usart2 {
+	pinctrl-names = "default", "idle", "sleep";
+	pinctrl-0 = <&usart2_pins_a>;
+	pinctrl-1 = <&usart2_idle_pins_a>;
+	pinctrl-2 = <&usart2_sleep_pins_a>;
+	/delete-property/ dmas;
+	/delete-property/ dma-names;
+	status = "okay";
+};
-- 
2.43.0