Re: [PATCH 3/3] arm64: dts: qcom: lemans: Add Draco EVK board
From: Dmitry Baryshkov
Date: Mon Oct 19 2026 - 08:09:01 EST
On Mon, Oct 19, 2026 at 03:57:34PM +0530, Gopikishan Thawre wrote:
> Add the device tree for the LeMans Draco EVK platform which combines
> the LeMans Draco EVK SoM and Draco carrier board.
>
> This device tree adds board-specific peripheral configuration on top
> of the SoM, including:
>
> - I2C GPIO expanders (TCA6416/PCA9534) on i2c2 and i2c18
> - EEPROM with MAC address nvmem layout on i2c18
> - Native DisplayPort output (DP0-DP3)
> - Dual Ethernet (ethernet0/ethernet1) with HSGMII PHY over SerDes
> - ST33HTPM TPM over SPI16
> - AMC6821 fan controller on i2c4
>
> Co-developed-by: Vishnu Saini <vishnu.saini@xxxxxxxxxxxxxxxx>
> Signed-off-by: Vishnu Saini <vishnu.saini@xxxxxxxxxxxxxxxx>
> Co-developed-by: Khalid Faisal Ansari <khalid.ansari@xxxxxxxxxxxxxxxx>
> Signed-off-by: Khalid Faisal Ansari <khalid.ansari@xxxxxxxxxxxxxxxx>
> Co-developed-by: Ajinkya Inchure <ainchure@xxxxxxxxxxxxxxxx>
> Signed-off-by: Ajinkya Inchure <ainchure@xxxxxxxxxxxxxxxx>
> Co-developed-by: Anuj Tripathi <anuj.tripathi@xxxxxxxxxxxxxxxx>
> Signed-off-by: Anuj Tripathi <anuj.tripathi@xxxxxxxxxxxxxxxx>
> Signed-off-by: Gopikishan Thawre <gopikishan.thawre@xxxxxxxxxxxxxxxx>
> ---
> arch/arm64/boot/dts/qcom/Makefile | 5 +
> arch/arm64/boot/dts/qcom/lemans-draco-evk.dts | 543 ++++++++++++++++++++++++++
> 2 files changed, 548 insertions(+)
>
> +
> +&i2c2 {
> + status = "okay";
> +
> + expander0: gpio@20 {
> + compatible = "ti,tca6416";
> + reg = <0x20>;
> + #gpio-cells = <2>;
> + gpio-controller;
> + };
> +
> + expander1: gpio@21 {
> + compatible = "ti,tca6416";
> + reg = <0x21>;
> + #gpio-cells = <2>;
> + gpio-controller;
> + };
> +
> + expander2: gpio@22 {
> + compatible = "ti,tca6416";
> + reg = <0x22>;
> + #gpio-cells = <2>;
> + gpio-controller;
> + };
> +
> + expander3: gpio@23 {
> + compatible = "ti,tca6416";
> + reg = <0x23>;
> + #gpio-cells = <2>;
> + gpio-controller;
> + };
> +
> + expander4: gpio@38 {
> + compatible = "nxp,pca9534";
> + reg = <0x38>;
> + #gpio-cells = <2>;
> + gpio-controller;
> + };
> +};
> +
> +&tlmm {
Please make sure to sort your DT file. You have 'tlmm' node between
'i2c2' and 'i2c18'.
> +
> + dp2_hot_plug_det: dp2-hot-plug-det-state {
> + pins = "gpio104";
> + function = "edp2_hot";
> + bias-disable;
> + };
> +
> + dp3_hot_plug_det: dp3-hot-plug-det-state {
> + pins = "gpio103";
> + function = "edp3_hot";
> + bias-disable;
> + };
> +
> + ethernet0_default: ethernet0-default-state {
> + ethernet0_mdc: ethernet0-mdc-pins {
> + pins = "gpio8";
> + function = "emac0_mdc";
> + drive-strength = <16>;
> + bias-pull-up;
> + };
> +
> + ethernet0_mdio: ethernet0-mdio-pins {
> + pins = "gpio9";
> + function = "emac0_mdio";
> + drive-strength = <16>;
> + bias-pull-up;
> + };
> + };
> +
> + ethernet1_default: ethernet1-default-state {
> + ethernet1_mdc: ethernet1-mdc-pins {
> + pins = "gpio20";
> + function = "emac1_mdc";
> + drive-strength = <16>;
> + bias-pull-up;
> + };
> +
> + ethernet1_mdio: ethernet1-mdio-pins {
> + pins = "gpio21";
> + function = "emac1_mdio";
> + drive-strength = <16>;
> + bias-pull-up;
> + };
> + };
> +
> +};
> +
> +&i2c18 {
> + status = "okay";
> +
> + expander5: gpio@3c {
> + compatible = "nxp,pca9534";
> + reg = <0x3c>;
> + #gpio-cells = <2>;
> + gpio-controller;
> + };
> +
> + eeprom@50 {
> + compatible = "giantec,gt24c256c", "atmel,24c256";
> + reg = <0x50>;
> + pagesize = <64>;
> +
> + nvmem-layout {
> + compatible = "fixed-layout";
> + #address-cells = <1>;
> + #size-cells = <1>;
> +
> + mac_addr0: mac-addr@0 {
> + reg = <0x0 0x6>;
> + };
> +
> + mac_addr1: mac-addr@6 {
> + reg = <0x6 0x6>;
> + };
> + };
> + };
> +};
> +
> +&i2c4 {
More of the nodes in the wrong order. Please go through the whole file.
> + status = "okay";
> +
> + fan_controller: fan@1a {
> + compatible = "ti,amc6821";
> + reg = <0x1a>;
> + #pwm-cells = <2>;
> +
> + fan {
> + pwms = <&fan_controller 40000 PWM_POLARITY_INVERTED>;
> + };
> + };
> +};
> +
--
With best wishes
Dmitry