[PATCH v6 00/16] arm64: support Engicam MicroGEA-STM32MP257-RMM board

[PATCH v6 00/16] 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.

Changes in v6:
- Update arch/arm64/configs/defconfig to match the current upstream defconfig
  after merge window changes (no functional changes).

Changes in v5:
- Add patch 2/16 arm64: dts: st: add power-domains to sdmmc1 on stm32mp231
- Add patch 3/16 arm64: dts: st: add power-domains to sdmmc1 on stm32mp251
- Increase slew-rate to <1> of ltdc pins to support the 27 MHz pixel clock
  and prevent timing violations.
- Change SDMMC2_CK pin bias from pull-up to bias-disable to avoid signal
  integrity issues on the clock line
- Fix touchscreen resolution to 480x854
- Fix SPI1 CS0 polarity to GPIO_ACTIVE_LOW

Changes in v4:
- Drop inclusion of stm32mp25xf.dtsi from stm32mp257-engicam-microgea.dtsi

Changes in v3:
- Add power-domains property in the SDMMC2 node.
- Drop patch "arm64: defconfig: cleanup the defconfig"

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 (16):
  dt-bindings: arm: stm32: support Engicam MicroGEA-STM32MP257-RMM board
  arm64: dts: st: add power-domains to sdmmc1 on stm32mp231
  arm64: dts: st: add power-domains to sdmmc1 on stm32mp251
  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: 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/stm32mp231.dtsi        |   1 +
 arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi | 328 ++++++++++++++++++
 arch/arm64/boot/dts/st/stm32mp251.dtsi        |  17 +
 arch/arm64/boot/dts/st/stm32mp253.dtsi        |  16 +
 .../st/stm32mp257-engicam-microgea-rmm.dts    | 319 +++++++++++++++++
 .../dts/st/stm32mp257-engicam-microgea.dtsi   |  63 ++++
 arch/arm64/configs/defconfig                  |   4 +
 9 files changed, 756 insertions(+)
 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: dc59e4fea9d83f03bad6bddf3fa2e52491777482
branch: stm32mp257d-microgea

[PATCH v6 01/16] 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>

---

(no changes since v2)

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 v6 02/16] arm64: dts: st: add power-domains to sdmmc1 on stm32mp231

[Dario Binacchi]

The sdmmc1 node was introduced early in the SoC bring-up before power
domains were systematically mapped. Add the missing power-domains
property to align it with the rest of the peripheral nodes.

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

---

(no changes since v5)

Changes in v5:
- Added in version 5. Suggested by Sashiko.

 arch/arm64/boot/dts/st/stm32mp231.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/st/stm32mp231.dtsi b/arch/arm64/boot/dts/st/stm32mp231.dtsi
index 9e1d240888ff..0feb8943efae 100644
--- a/arch/arm64/boot/dts/st/stm32mp231.dtsi
+++ b/arch/arm64/boot/dts/st/stm32mp231.dtsi
@@ -727,6 +727,7 @@ sdmmc1: mmc@48220000 {
 				cap-mmc-highspeed;
 				max-frequency = <120000000>;
 				access-controllers = <&rifsc 76>;
+				power-domains = <&cluster_pd>;
 				status = "disabled";
 			};
 
-- 
2.43.0

[PATCH v6 03/16] arm64: dts: st: add power-domains to sdmmc1 on stm32mp251

[Dario Binacchi]

The sdmmc1 node was introduced early in the SoC bring-up before power
domains were systematically mapped. Add the missing power-domains
property to align it with the rest of the peripheral nodes.

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

---

(no changes since v5)

Changes in v5:
- Added in version 5. Suggested by Sashiko.

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

diff --git a/arch/arm64/boot/dts/st/stm32mp251.dtsi b/arch/arm64/boot/dts/st/stm32mp251.dtsi
index 9c63fdb5a885..ae36d703532c 100644
--- a/arch/arm64/boot/dts/st/stm32mp251.dtsi
+++ b/arch/arm64/boot/dts/st/stm32mp251.dtsi
@@ -1664,6 +1664,7 @@ sdmmc1: mmc@48220000 {
 				cap-mmc-highspeed;
 				max-frequency = <120000000>;
 				access-controllers = <&rifsc 76>;
+				power-domains = <&CLUSTER_PD>;
 				status = "disabled";
 			};
 
-- 
2.43.0

[PATCH v6 04/16] 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 v3)

Changes in v3:
- Add power-domains property. Suggested by Sashiko.

 arch/arm64/boot/dts/st/stm32mp251.dtsi | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/arm64/boot/dts/st/stm32mp251.dtsi b/arch/arm64/boot/dts/st/stm32mp251.dtsi
index ae36d703532c..44938c036e30 100644
--- a/arch/arm64/boot/dts/st/stm32mp251.dtsi
+++ b/arch/arm64/boot/dts/st/stm32mp251.dtsi
@@ -1668,6 +1668,22 @@ 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>;
+				power-domains = <&CLUSTER_PD>;
+				status = "disabled";
+			};
+
 			ethernet1: ethernet@482c0000 {
 				compatible = "st,stm32mp25-dwmac", "snps,dwmac-5.20";
 				reg = <0x482c0000 0x4000>;
-- 
2.43.0

[PATCH v6 05/16] 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>

---

(no changes since v2)

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 v6 06/16] 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 v6 07/16] 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 v5)

Changes in v5:
- Increase slew-rate to <1> to support the 27 MHz pixel clock and
  prevent timing violations. Suggested by Sashiko

 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..50f454630cf2 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 = <1>;
+		};
+	};
+
+	/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 v6 08/16] 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 50f454630cf2..6482dd47e977 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 v6 09/16] 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 6482dd47e977..695c9d771853 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 v6 10/16] 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 695c9d771853..002fbc724b9d 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

Re: [Linux-stm32] [PATCH v6 10/16] arm64: dts: st: add sai1 pins for stm32mp25

[Olivier MOYSAN]

Hi Dario,

On 6/30/26 11:24, Dario Binacchi wrote:
> 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 695c9d771853..002fbc724b9d 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 {

You can add Reviewed-by: Olivier Moysan <olivier.moysan@foss.st.com>

Thanks & Regards
Olivier

[PATCH v6 11/16] 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 v5)

Changes in v5:
- Change SDMMC2_CK pin bias from pull-up to bias-disable to
  avoid signal integrity issues on the clock line. Suggested by Sashiko

 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 002fbc724b9d..c816a6aece47 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-disable;
+		};
+	};
+
+	/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-disable;
+		};
+		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 v6 12/16] 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 c816a6aece47..4e570e2e5157 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 v6 13/16] 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 4e570e2e5157..d515e44832d7 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 v6 14/16] 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.pdf
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>

---

(no changes since v4)

Changes in v4:
- Drop inclusion of stm32mp25xf.dtsi, we are using stm32mp257d.

Changes in v3:
- Fix a typo in the URL

 .../dts/st/stm32mp257-engicam-microgea.dtsi   | 63 +++++++++++++++++++
 1 file changed, 63 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..5b4287e86def
--- /dev/null
+++ b/arch/arm64/boot/dts/st/stm32mp257-engicam-microgea.dtsi
@@ -0,0 +1,63 @@
+// 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 "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 v6 15/16] 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>

---

(no changes since v5)

Changes in v5:
- Fix touchscreen resolution to 480x854
- Fix SPI1 CS0 polarity to GPIO_ACTIVE_LOW

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..3aea0c2f6651
--- /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 = <480>;
+		touchscreen-size-y = <854>;
+	};
+};
+
+&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_LOW>, <&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