linux-kernel - Re: [PATCH v2 1/1] arm64: dts: qcom: lemans-evk: Add Mezzanine

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Message-ID: <eb4bb75c-7594-4890-82e8-97a06ee67d42@oss.qualcomm.com>
Date: Tue, 3 Feb 2026 12:56:00 +0530
From: Umang Chheda <umang.chheda@....qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Cc: andersson@...nel.org, konradybcio@...nel.org, robh@...nel.org,
        krzk+dt@...nel.org, conor+dt@...nel.org, richardcochran@...il.com,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, mohd.anwar@....qualcomm.com,
        krishna.chundru@....qualcomm.com, monish.chunara@....qualcomm.com
Subject: Re: [PATCH v2 1/1] arm64: dts: qcom: lemans-evk: Add Mezzanine

Hi Dmitry,

On 2/3/2026 1:49 AM, Dmitry Baryshkov wrote:
> On Tue, Feb 03, 2026 at 01:12:34AM +0530, Umang Chheda wrote:
>> The Mezzanine is an hardware expansion add-on board designed
>> to be stacked on top of Lemans EVK.
>>
>> It has following peripherals :
>>
>> - 4x Type A USB ports in host mode.
>> - TC9563 PCIe switch, which has following three downstream ports (DSP) :
>>    - 1st DSP connects M.2 E-key connector for connecting WLAN endpoints.
>>    - 2nd DSP connects M.2 B-key connector for connecting cellular modems.
>>    - 3rd DSP with support for Dual Ethernet ports.
>> - eMMC.
>> - Additional 2.5GbE Ethernet PHY connected to native EMAC with support for
>>   MAC Address configuration via NVMEM.
>> - EEPROM.
>> - LVDS Display.
>> - 2*mini DP.
>>
>> Add support for following peripherals :
>> - TC9563 PCIe Switch.
>> - Additional 2.5GbE Ethernet Port.
>> - EEPROM.
>>
>> Written with inputs from :
>>     Mohd Ayaan Anwar <mohd.anwar@....qualcomm.com> - Ethernet.
>>     Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com> - PCIe
>>     Monish Chunara <monish.chunara@....qualcomm.com> - EEPROM.
>>
>> Signed-off-by: Umang Chheda <umang.chheda@....qualcomm.com>
>> ---
>>  arch/arm64/boot/dts/qcom/Makefile             |   4 +
>>  .../boot/dts/qcom/lemans-evk-mezzanine.dtso   | 301 ++++++++++++++++++
>>  2 files changed, 305 insertions(+)
>>  create mode 100644 arch/arm64/boot/dts/qcom/lemans-evk-mezzanine.dtso
>>
>> diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
>> index f80b5d9cf1e8..79449004adfd 100644
>> --- a/arch/arm64/boot/dts/qcom/Makefile
>> +++ b/arch/arm64/boot/dts/qcom/Makefile
>> @@ -43,6 +43,10 @@ dtb-$(CONFIG_ARCH_QCOM)	+= lemans-evk-camera.dtb
>>  lemans-evk-el2-dtbs := lemans-evk.dtb lemans-el2.dtbo
>>
>>  dtb-$(CONFIG_ARCH_QCOM)	+= lemans-evk-el2.dtb
>> +
>> +lemans-evk-mezzanine-dtbs	:= lemans-evk.dtb lemans-evk-mezzanine.dtbo
>> +
>> +dtb-$(CONFIG_ARCH_QCOM)	+= lemans-evk-mezzanine.dtb
>>  dtb-$(CONFIG_ARCH_QCOM)	+= milos-fairphone-fp6.dtb
>>  dtb-$(CONFIG_ARCH_QCOM)	+= monaco-evk.dtb
>>  dtb-$(CONFIG_ARCH_QCOM)	+= msm8216-samsung-fortuna3g.dtb
>> diff --git a/arch/arm64/boot/dts/qcom/lemans-evk-mezzanine.dtso b/arch/arm64/boot/dts/qcom/lemans-evk-mezzanine.dtso
>> new file mode 100644
>> index 000000000000..674afe485a1b
>> --- /dev/null
>> +++ b/arch/arm64/boot/dts/qcom/lemans-evk-mezzanine.dtso
>> @@ -0,0 +1,301 @@
>> +// SPDX-License-Identifier: BSD-3-Clause
>> +/*
>> + * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
>> + */
>> +
>> +/dts-v1/;
>> +/plugin/;
>> +
>> +#include <dt-bindings/gpio/gpio.h>
>> +
>> +&{/} {
>> +	model = "Qualcomm Technologies, Inc. Lemans-evk Mezzanine";
>> +
>> +	vreg_sys_pwr: regulator-vreg-sys-pwr {
> Please sort the nodes.

Ack

>
>> +		compatible = "regulator-fixed";
>> +		regulator-name = "VREG_SYS_PWR";
>> +
>> +		regulator-min-microvolt = <24000000>;
>> +		regulator-max-microvolt = <24000000>;
>> +		regulator-always-on;
>> +		regulator-boot-on;
>> +	};
>> +
>> +	vreg_4p2: regulator-vreg-4p2 {


Thanks,
Umang