Re: [PATCH v2 1/1] arm64: dts: qcom: monaco-evk: Add Interface Plus Mezzanine

[Umang Chheda]

Hello Dmitry,

On 2/22/2026 11:57 PM, Dmitry Baryshkov wrote:
> On Sun, Feb 22, 2026 at 11:05:45PM +0530, Umang Chheda wrote:
>> The Interface Plus [IFP] Mezzanine is an hardware expansion add-on
>> board designed to be stacked on top of Monaco 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.
> Nit: routed to? Is that M.2 only suitable for WLANs? What is "WLAN
> endpoints"?

> routed to?
If I understand correctly - you mean change string "connects M.2 E-Key connector" to 
"routed to M.2 E-Key connector" ?
 

> Is that M.2 only suitable for WLANs?
Yes, this is suitable only for the WLAN module.

> What is "WLAN endpoints"?

I Agree this is misleading - will change this to "WLAN module"

>
>>    - 2nd DSP connects M.2 B-key connector for connecting cellular
>>      modems.
>>    - 3rd DSP with support for Dual Ethernet ports.
>> - EEPROM.
>> - LVDS Display.
>> - 2*mini DP.
>>
>> Add support for following peripherals :
>> - TC9563 PCIe Switch.
>> - EEPROM.
> If there is an onboard USB hub, please describe it here. Also, what is
> the story of mini DP ports? If they are to be enabled later, please
> mention, why.

> If there is an onboard USB hub, please describe it here.

Ack, Since there are no DT changes required to enable USB Hub I did not mention.

will mention it here in the next patch.

> Also, what is the story of mini DP ports?
There is a H/W issue being is being debugged for mini DP ports - Hence did not mention.

> If they are to be enabled later, please mention, why.

Ack

>
>> Written with inputs from :
>>     Krishna Chaitanya Chundru <krishna.chundru@xxxxxxxxxxxxxxxx> - PCIe
>>     Monish Chunara <monish.chunara@xxxxxxxxxxxxxxxx> - EEPROM.
>>
>> Signed-off-by: Umang Chheda <umang.chheda@xxxxxxxxxxxxxxxx>
>> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxxxxxxxx>
>> ---
>>  arch/arm64/boot/dts/qcom/Makefile             |   4 +
>>  .../dts/qcom/monaco-evk-ifp-mezzanine.dtso    | 184 ++++++++++++++++++
>>  2 files changed, 188 insertions(+)
>>  create mode 100644 arch/arm64/boot/dts/qcom/monaco-evk-ifp-mezzanine.dtso
>>
>> diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
>> index f80b5d9cf1e8..9d298e7e8a90 100644
>> --- a/arch/arm64/boot/dts/qcom/Makefile
>> +++ b/arch/arm64/boot/dts/qcom/Makefile
>> @@ -45,6 +45,10 @@ lemans-evk-el2-dtbs := lemans-evk.dtb lemans-el2.dtbo
>>  dtb-$(CONFIG_ARCH_QCOM)	+= lemans-evk-el2.dtb
>>  dtb-$(CONFIG_ARCH_QCOM)	+= milos-fairphone-fp6.dtb
>>  dtb-$(CONFIG_ARCH_QCOM)	+= monaco-evk.dtb
>> +
>> +monaco-evk-ifp-mezzanine-dtbs	:= monaco-evk.dtb monaco-evk-ifp-mezzanine.dtbo
>> +
>> +dtb-$(CONFIG_ARCH_QCOM)	+= monaco-evk-ifp-mezzanine.dtb
>>  dtb-$(CONFIG_ARCH_QCOM)	+= msm8216-samsung-fortuna3g.dtb
>>  dtb-$(CONFIG_ARCH_QCOM)	+= msm8916-acer-a1-724.dtb
>>  dtb-$(CONFIG_ARCH_QCOM)	+= msm8916-alcatel-idol347.dtb
>> diff --git a/arch/arm64/boot/dts/qcom/monaco-evk-ifp-mezzanine.dtso b/arch/arm64/boot/dts/qcom/monaco-evk-ifp-mezzanine.dtso
>> new file mode 100644
>> index 000000000000..f0572647200c
>> --- /dev/null
>> +++ b/arch/arm64/boot/dts/qcom/monaco-evk-ifp-mezzanine.dtso
>> @@ -0,0 +1,184 @@
>> +// 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. Monaco-EVK IFP Mezzanine";
>> +
>> +	vreg_0p9: regulator-vreg-0p9 {
> Are all these regulators a part of the mezzanine?
Yes, all these regulators are part of mezzanine board.
>
>> +		compatible = "regulator-fixed";
>> +		regulator-name = "VREG_0P9";
>> +
>> +		regulator-min-microvolt = <900000>;
>> +		regulator-max-microvolt = <900000>;
>> +		regulator-always-on;
>> +		regulator-boot-on;
>> +
>> +		vin-supply = <&vreg_3p3>;
>> +	};
>> +
>> +	vreg_1p8: regulator-vreg-1p8 {
>> +		compatible = "regulator-fixed";
>> +		regulator-name = "VREG_1P8";
>> +
>> +		regulator-min-microvolt = <1800000>;
>> +		regulator-max-microvolt = <1800000>;
>> +		regulator-always-on;
>> +		regulator-boot-on;
>> +
>> +		vin-supply = <&vreg_4p2>;
>> +	};
>> +
>> +	vreg_3p3: regulator-vreg-3p3 {
>> +		compatible = "regulator-fixed";
>> +		regulator-name = "VREG_3P3";
>> +
>> +		regulator-min-microvolt = <3300000>;
>> +		regulator-max-microvolt = <3300000>;
>> +		regulator-always-on;
>> +		regulator-boot-on;
>> +
>> +		vin-supply = <&vreg_4p2>;
>> +	};
>> +
>> +	vreg_4p2: regulator-vreg-4p2 {
>> +		compatible = "regulator-fixed";
>> +		regulator-name = "VREG_4P2";
>> +
>> +		regulator-min-microvolt = <4200000>;
>> +		regulator-max-microvolt = <4200000>;
>> +		regulator-always-on;
>> +		regulator-boot-on;
>> +
>> +		vin-supply = <&vreg_sys_pwr>;
>> +	};
>> +
>> +	vreg_sys_pwr: regulator-vreg-sys-pwr {
>> +		compatible = "regulator-fixed";
>> +		regulator-name = "VREG_SYS_PWR";
>> +
>> +		regulator-min-microvolt = <24000000>;
>> +		regulator-max-microvolt = <24000000>;
>> +		regulator-always-on;
>> +		regulator-boot-on;
> ... supplied from what?
This regulator is supplied directly from the DC Power adapter.
>
>> +	};
>> +};
>> +
>> +&i2c15 {
>> +	#address-cells = <1>;
>> +	#size-cells = <0>;
>> +
>> +	eeprom1: eeprom@52 {
>> +		compatible = "giantec,gt24c256c", "atmel,24c256";
>> +		reg = <0x52>;
>> +		pagesize = <64>;
>> +
>> +		nvmem-layout {
>> +			compatible = "fixed-layout";
>> +			#address-cells = <1>;
>> +			#size-cells = <1>;
>> +		};
>> +	};
>> +};
>> +
>> +&pcie0 {
>> +	iommu-map = <0x0   &pcie_smmu 0x0 0x1>,
>> +		    <0x100 &pcie_smmu 0x1 0x1>,
>> +		    <0x208 &pcie_smmu 0x2 0x1>,
>> +		    <0x210 &pcie_smmu 0x3 0x1>,
>> +		    <0x218 &pcie_smmu 0x4 0x1>,
>> +		    <0x300 &pcie_smmu 0x5 0x1>,
>> +		    <0x400 &pcie_smmu 0x6 0x1>,
>> +		    <0x500 &pcie_smmu 0x7 0x1>,
>> +		    <0x501 &pcie_smmu 0x8 0x1>;
>> +};
>> +
>> +&pcieport0 {
>> +	#address-cells = <3>;
>> +	#size-cells = <2>;
>> +
>> +	pcie@0,0 {
>> +		compatible = "pci1179,0623";
>> +		reg = <0x10000 0x0 0x0 0x0 0x0>;
>> +		#address-cells = <3>;
>> +		#size-cells = <2>;
>> +
>> +		device_type = "pci";
>> +		ranges;
>> +		bus-range = <0x2 0xff>;
>> +
>> +		vddc-supply = <&vreg_0p9>;
>> +		vdd18-supply = <&vreg_1p8>;
>> +		vdd09-supply = <&vreg_0p9>;
>> +		vddio1-supply = <&vreg_1p8>;
>> +		vddio2-supply = <&vreg_1p8>;
>> +		vddio18-supply = <&vreg_1p8>;
>> +
>> +		i2c-parent = <&i2c15 0x77>;
>> +
>> +		resx-gpios = <&tlmm 124 GPIO_ACTIVE_LOW>;
>> +
>> +		pinctrl-0 = <&tc9563_resx_n>;
>> +		pinctrl-names = "default";
>> +
>> +		pcie@1,0 {
>> +			reg = <0x20800 0x0 0x0 0x0 0x0>;
>> +			#address-cells = <3>;
>> +			#size-cells = <2>;
>> +
>> +			device_type = "pci";
>> +			ranges;
>> +			bus-range = <0x3 0xff>;
>> +		};
>> +
>> +		pcie@2,0 {
>> +			reg = <0x21000 0x0 0x0 0x0 0x0>;
>> +			#address-cells = <3>;
>> +			#size-cells = <2>;
>> +
>> +			device_type = "pci";
>> +			ranges;
>> +			bus-range = <0x4 0xff>;
>> +		};
>> +
>> +		pcie@3,0 {
>> +			reg = <0x21800 0x0 0x0 0x0 0x0>;
>> +			#address-cells = <3>;
>> +			#size-cells = <2>;
>> +			device_type = "pci";
>> +			ranges;
>> +			bus-range = <0x5 0xff>;
>> +
>> +			pci@0,0 {
>> +				reg = <0x50000 0x0 0x0 0x0 0x0>;
>> +				#address-cells = <3>;
>> +				#size-cells = <2>;
>> +				device_type = "pci";
>> +				ranges;
>> +			};
>> +
>> +			pci@0,1 {
>> +				reg = <0x50100 0x0 0x0 0x0 0x0>;
>> +				#address-cells = <3>;
>> +				#size-cells = <2>;
>> +				device_type = "pci";
>> +				ranges;
>> +			};
>> +		};
>> +	};
>> +};
>> +
>> +&tlmm {
>> +	tc9563_resx_n: tc9563-resx-state {
>> +		pins = "gpio124";
>> +		function = "gpio";
>> +		bias-disable;
>> +		output-high;
>> +	};
>> +};
>> --
>> 2.34.1
Thanks,
Umang