On Thu, Aug 28, 2025 at 12:48:47PM +0800, Yijie Yang wrote:
> The HAMOA-IOT-EVK is an evaluation platform for IoT products, composed of
> the Hamoa IoT SoM and a carrier board. Together, they form a complete
> embedded system capable of booting to UART.
>
> This change enables the following peripherals on the carrier board:
> - UART
> - On-board regulators
> - USB Type-C mux
> - Pinctrl
> - Embedded USB (EUSB) repeaters
> - NVMe
> - pmic-glink
> - USB DisplayPorts
> - Bluetooth
> - Graphic
> - Audio
>
> Written in collaboration with Quill Qi (Audio) <le.qi@xxxxxxxxxxxxxxxx>,
> Jie Zhang (Graphics) <quic_jiezh@xxxxxxxxxxx>, Shuai Zhang (Bluetooth)
> <quic_shuaz@xxxxxxxxxxx>, and Yongxing Mou (USB DisplayPorts)
> <quic_yongmou@xxxxxxxxxxx>.
>
> Signed-off-by: Yijie Yang <yijie.yang@xxxxxxxxxxxxxxxx>
> ---
> arch/arm64/boot/dts/qcom/Makefile | 1 +
> arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts | 1247 ++++++++++++++++++++++++++++
> 2 files changed, 1248 insertions(+)
>
> +
> + wcd938x: audio-codec {
> + compatible = "qcom,wcd9385-codec";
> +
> + pinctrl-0 = <&wcd_default>;
> + pinctrl-names = "default";
> +
> + reset-gpios = <&tlmm 191 GPIO_ACTIVE_LOW>;
> +
> + qcom,micbias1-microvolt = <1800000>;
> + qcom,micbias2-microvolt = <1800000>;
> + qcom,micbias3-microvolt = <1800000>;
> + qcom,micbias4-microvolt = <1800000>;
> + qcom,mbhc-buttons-vthreshold-microvolt = <75000 150000 237000 500000
> + 500000 500000 500000 500000>;
Other platforms use a single line here. If you don't want to do it,
align data to start from the same column rather than restarting from the
column 1.
> + qcom,mbhc-headset-vthreshold-microvolt = <1700000>;
> + qcom,mbhc-headphone-vthreshold-microvolt = <50000>;
> + qcom,rx-device = <&wcd_rx>;
> + qcom,tx-device = <&wcd_tx>;
> +
> + vdd-buck-supply = <&vreg_l15b_1p8>;
> + vdd-rxtx-supply = <&vreg_l15b_1p8>;
> + vdd-io-supply = <&vreg_l15b_1p8>;
> + vdd-mic-bias-supply = <&vreg_bob1>;
> +
> + #sound-dai-cells = <1>;
> + };
> +
> + wcn7850-pmu {
> + compatible = "qcom,wcn7850-pmu";
> +
> + vdd-supply = <&vreg_wcn_0p95>;
> + vddio-supply = <&vreg_l15b_1p8>;
> + vddaon-supply = <&vreg_wcn_0p95>;
> + vdddig-supply = <&vreg_wcn_0p95>;
> + vddrfa1p2-supply = <&vreg_wcn_1p9>;
> + vddrfa1p8-supply = <&vreg_wcn_1p9>;
> +
> + bt-enable-gpios = <&tlmm 116 GPIO_ACTIVE_HIGH>;
Okay, so how is WiFi controlled? Is there a GPIO? The DT should be
describing the hardware, not the UEFI behaviour.
> +
> + pinctrl-0 = <&wcn_bt_en>;
> + pinctrl-names = "default";
> +
--
With best wishes
Dmitry
