[PATCH 0/3] Enable display support for STM32MP257F-DK

[PATCH 0/3] Enable display support for STM32MP257F-DK

[Raphael Gallais-Pou]

This series aims to add and enable sufficient LVDS display support for
STM32MP257F-DK board.

Signed-off-by: Raphael Gallais-Pou <raphael.gallais-pou@foss.st.com>
---
Raphael Gallais-Pou (3):
      arm64: dts: st: add i2c2 pins for stm32mp25
      arm64: dts: st: describe power supplies for stm32mp257f-dk board
      arm64: dts: st: enable display support on stm32mp257f-dk board

 arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi |  17 ++++
 arch/arm64/boot/dts/st/stm32mp257f-dk.dts     | 118 ++++++++++++++++++++++++++
 2 files changed, 135 insertions(+)
---
base-commit: f14faaf3a1fb3b9e4cf2e56269711fb85fba9458
change-id: 20260205-master-8194059eb646

Best regards,
-- 
Raphael Gallais-Pou <raphael.gallais-pou@foss.st.com>

[PATCH 1/3] arm64: dts: st: add i2c2 pins for stm32mp25

[Raphael Gallais-Pou]

Add the i2c2 pins used on STM32MP257F-DK board.

Signed-off-by: Raphael Gallais-Pou <raphael.gallais-pou@foss.st.com>
---
 arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi b/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
index c34cd33cd855fb28b65a39b59b49e089345ce9a6..2f853f3fae6d84756300f19da32d6cb0297d9e20 100644
--- a/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
+++ b/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
@@ -212,6 +212,23 @@ pins {
 		};
 	};
 
+	i2c2_pins_b: i2c2-1 {
+		pins {
+			pinmux = <STM32_PINMUX('F', 2, AF9)>, /* I2C2_SCL */
+				 <STM32_PINMUX('F', 0, AF9)>; /* I2C2_SDA */
+			bias-disable;
+			drive-open-drain;
+			slew-rate = <0>;
+		};
+	};
+
+	i2c2_sleep_pins_b: i2c2-sleep-1 {
+		pins {
+			pinmux = <STM32_PINMUX('F', 2, ANALOG)>, /* I2C2_SCL */
+				 <STM32_PINMUX('F', 0, ANALOG)>; /* I2C2_SDA */
+		};
+	};
+
 	ospi_port1_clk_pins_a: ospi-port1-clk-0 {
 		pins {
 			pinmux = <STM32_PINMUX('D', 0, AF10)>; /* OSPI1_CLK */

-- 
2.43.0

[PATCH 2/3] arm64: dts: st: describe power supplies for stm32mp257f-dk board

[Raphael Gallais-Pou]

Describe power supplies for stm32mp257f-dk board.

Signed-off-by: Raphael Gallais-Pou <raphael.gallais-pou@foss.st.com>
---
 arch/arm64/boot/dts/st/stm32mp257f-dk.dts | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/arch/arm64/boot/dts/st/stm32mp257f-dk.dts b/arch/arm64/boot/dts/st/stm32mp257f-dk.dts
index e718d888ce21b6f124331543c09c1e66e6304964..4e45562ceb3dabb19eca3340337b364f63508215 100644
--- a/arch/arm64/boot/dts/st/stm32mp257f-dk.dts
+++ b/arch/arm64/boot/dts/st/stm32mp257f-dk.dts
@@ -105,6 +105,34 @@ scmi_vddio1: regulator@0 {
 		regulator-min-microvolt = <1800000>;
 		regulator-max-microvolt = <3300000>;
 	};
+	scmi_vddcore: regulator@11 {
+		reg = <VOLTD_SCMI_STPMIC2_BUCK2>;
+		regulator-name = "vddcore";
+	};
+	scmi_v1v8: regulator@14 {
+		reg = <VOLTD_SCMI_STPMIC2_BUCK5>;
+		regulator-name = "v1v8";
+	};
+	scmi_v3v3: regulator@16 {
+		reg = <VOLTD_SCMI_STPMIC2_BUCK7>;
+		regulator-name = "v3v3";
+	};
+	scmi_vdd_emmc: regulator@18 {
+		reg = <VOLTD_SCMI_STPMIC2_LDO2>;
+		regulator-name = "vdd_emmc";
+	};
+	scmi_vdd3v3_usb: regulator@20 {
+		reg = <VOLTD_SCMI_STPMIC2_LDO4>;
+		regulator-name = "vdd3v3_usb";
+	};
+	scmi_v5v_hdmi: regulator@21 {
+		reg = <VOLTD_SCMI_STPMIC2_LDO5>;
+		regulator-name = "v5v_hdmi";
+	};
+	scmi_v5v_vconn: regulator@22 {
+		reg = <VOLTD_SCMI_STPMIC2_LDO6>;
+		regulator-name = "v5v_vconn";
+	};
 	scmi_vdd_sdcard: regulator@23 {
 		reg = <VOLTD_SCMI_STPMIC2_LDO7>;
 		regulator-name = "vdd_sdcard";

-- 
2.43.0

[PATCH 3/3] arm64: dts: st: enable display support on stm32mp257f-dk board

[Raphael Gallais-Pou]

Enable the following IPs on stm32mp257f-dk in order to get display:
   * LTDC
   * LVDS
   * WSVGA LVDS panel (1024x600)
   * Panel LVDS backlight as GPIO backlight
   * ILI2511 i2c touchscreen

Signed-off-by: Raphael Gallais-Pou <raphael.gallais-pou@foss.st.com>
---
 arch/arm64/boot/dts/st/stm32mp257f-dk.dts | 90 +++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)

diff --git a/arch/arm64/boot/dts/st/stm32mp257f-dk.dts b/arch/arm64/boot/dts/st/stm32mp257f-dk.dts
index 4e45562ceb3dabb19eca3340337b364f63508215..b60c13614cfb9207b8b541ee8bde4ae9aab937a8 100644
--- a/arch/arm64/boot/dts/st/stm32mp257f-dk.dts
+++ b/arch/arm64/boot/dts/st/stm32mp257f-dk.dts
@@ -55,6 +55,43 @@ led-blue {
 		};
 	};
 
+	panel_lvds: display {
+		compatible = "edt,etml0700z9ndha", "panel-lvds";
+		enable-gpios = <&gpioi 4 GPIO_ACTIVE_HIGH>;
+		backlight = <&panel_lvds_backlight>;
+		power-supply = <&scmi_v3v3>;
+		width-mm = <156>;
+		height-mm = <92>;
+		data-mapping = "vesa-24";
+		status = "okay";
+
+		panel-timing {
+			clock-frequency = <54000000>;
+			hactive = <1024>;
+			vactive = <600>;
+			hfront-porch = <150>;
+			hback-porch = <150>;
+			hsync-len = <21>;
+			vfront-porch = <24>;
+			vback-porch = <24>;
+			vsync-len = <21>;
+		};
+
+		port {
+			lvds_panel_in: endpoint {
+				remote-endpoint = <&lvds_out0>;
+			};
+		};
+	};
+
+	panel_lvds_backlight: backlight {
+		compatible = "gpio-backlight";
+		gpios = <&gpioi 4 GPIO_ACTIVE_HIGH>;
+		default-on;
+		status = "okay";
+	};
+
+
 	memory@80000000 {
 		device_type = "memory";
 		reg = <0x0 0x80000000 0x1 0x0>;
@@ -100,6 +137,59 @@ phy1_eth1: ethernet-phy@1 {
 	};
 };
 
+&i2c2 {
+	pinctrl-names = "default", "sleep";
+	pinctrl-0 = <&i2c2_pins_b>;
+	pinctrl-1 = <&i2c2_sleep_pins_b>;
+	i2c-scl-rising-time-ns = <108>;
+	i2c-scl-falling-time-ns = <12>;
+	clock-frequency = <400000>;
+	status = "okay";
+	/* spare dmas for other usage */
+	/delete-property/dmas;
+	/delete-property/dma-names;
+
+	ili2511: ili2511@41 {
+		compatible = "ilitek,ili251x";
+		reg = <0x41>;
+		interrupt-parent = <&gpioi>;
+		interrupts = <6 IRQ_TYPE_EDGE_FALLING>;
+		reset-gpios = <&gpioi 0 GPIO_ACTIVE_LOW>;
+		status = "okay";
+	};
+};
+
+&ltdc {
+	status = "okay";
+	port {
+		ltdc_ep0_out: endpoint {
+			remote-endpoint = <&lvds_in>;
+		};
+	};
+};
+
+&lvds {
+	status = "okay";
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port@0 {
+			reg = <0>;
+			lvds_in: endpoint {
+				remote-endpoint = <&ltdc_ep0_out>;
+			};
+		};
+
+		port@1 {
+			reg = <1>;
+			lvds_out0: endpoint {
+				remote-endpoint = <&lvds_panel_in>;
+			};
+		};
+	};
+};
+
 &scmi_regu {
 	scmi_vddio1: regulator@0 {
 		regulator-min-microvolt = <1800000>;

-- 
2.43.0