Hi,

Bjorn Andersson <bjorn.andersson@linaro.org> writes:
>> diff --git a/arch/arm64/boot/dts/qcom/sm8150-microsoft-surface-duo.dts b/arch/arm64/boot/dts/qcom/sm8150-microsoft-surface-duo.dts
>> new file mode 100644
>> index 000000000000..f53d4b3dd482
>> --- /dev/null
>> +++ b/arch/arm64/boot/dts/qcom/sm8150-microsoft-surface-duo.dts
>> @@ -0,0 +1,545 @@
>> +// SPDX-License-Identifier: BSD-3-Clause
>> +/*
>> + * Copyright (C) 2021, Microsoft Corporation
>> + */
>> +
>> +/dts-v1/;
>> +
>> +#include <dt-bindings/regulator/qcom,rpmh-regulator.h>
>> +#include <dt-bindings/gpio/gpio.h>
>> +#include "sm8150.dtsi"
>> +#include "pm8150.dtsi"
>> +#include "pm8150b.dtsi"
>> +#include "pm8150l.dtsi"
>> +
>> +/ {
>> +	model = "Microsoft Surface Duo";
>> +	compatible = "microsoft,surface-duo", "qcom,sm8150-mtp";
>> +
>> +	aliases {
>> +		serial0 = &uart2;
>> +	};
>> +
>> +	chosen {
>> +		stdout-path = "serial0:115200n8";
>> +	};
>> +
>> +	vph_pwr: vph-pwr-regulator {
>> +		compatible = "regulator-fixed";
>> +		regulator-name = "vph_pwr";
>> +		regulator-min-microvolt = <3700000>;
>> +		regulator-max-microvolt = <3700000>;
>> +	};
>> +
>> +	/*
>> +	 * Apparently RPMh does not provide support for PM8150 S4 because it
>> +	 * is always-on; model it as a fixed regulator.
>> +	 */
>> +	vreg_s4a_1p8: pm8150-s4 {
>> +		compatible = "regulator-fixed";
>> +		regulator-name = "vreg_s4a_1p8";
>> +
>> +		regulator-min-microvolt = <1800000>;
>> +		regulator-max-microvolt = <1800000>;
>> +
>> +		regulator-always-on;
>> +		regulator-boot-on;
>> +
>> +		vin-supply = <&vph_pwr>;
>> +	};
>> +
>> +	gpio_keys {
>> +		compatible = "gpio-keys";
>> +
>> +		vol_up {
>> +			label = "Volume Up";
>> +			gpios = <&pm8150_gpios 6 GPIO_ACTIVE_LOW>;
>> +			linux,code = <KEY_VOLUMEUP>;
>> +		};
>> +	};
>> +};
>> +
>> +&tlmm {
>
> Please sort all nodes alphabetically.

will do.

>> +&remoteproc_adsp {
>> +	status = "okay";
>> +	firmware-name = "qcom/sm8150/adsp.mdt";
>
> For platforms where we have a Dragonboard or similar we push the
> test-signed firmware to qcom/<platform>/. I presume that the Duo
> wouldn't run on the test-signed firmware.
>
> So I think it's better to make this qcom/sm8150/ms-duo/adsp.mdt...from
> the start.

ms-duo would look odd. How about qcom/sm8150/microsoft/adsp.mdt?

-- 
balbi