linux-kernel - Re: [PATCH v5 2/2] arm64: dts: freescale: add NXP FRDM-IMX91S board support

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Message-ID: <9b223407-9218-4382-9968-6541cf485b9d@nxp.com>
Date: Wed, 11 Feb 2026 09:54:52 +0800
From: Joseph Guo <qijian.guo@....com>
To: Frank Li <Frank.li@....com>, Yanan Yang <yanan.yang@....com>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
 Sascha Hauer <s.hauer@...gutronix.de>,
 Pengutronix Kernel Team <kernel@...gutronix.de>,
 Fabio Estevam <festevam@...il.com>, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, imx@...ts.linux.dev,
 linux-arm-kernel@...ts.infradead.org, justin.jiang@....com,
 Lei Xu <lei.xu@....com>, Xiaofeng Wei <xiaofeng.wei@....com>
Subject: Re: [PATCH v5 2/2] arm64: dts: freescale: add NXP FRDM-IMX91S board
 support

On 2/10/2026 11:51 PM, Frank Li wrote:
> On Tue, Feb 10, 2026 at 07:47:55PM +0900, Yanan Yang wrote:
>> Add DeviceTree support for the NXP FRDM-IMX91S development board based
>> on the i.MX91 SoC. FRDM-IMX91S is a cost-optimized variant of FRDM-IMX91
>> and differs in memory, storage, Ethernet, and PMIC configuration:
>>
>> - 512MB LPDDR4 (FRDM-IMX91 uses 1GB)
>> - 256MB FlexSPI-NAND (FRDM-IMX91 uses 8GB eMMC)
>> - Single GbE port (FRDM-IMX91 has dual GbE)
>> - PMIC PF9453 (FRDM-IMX91 uses PCA9451A)
> 
> Look like it is very similar with imx91-11x11-frdm boards.
> 
> Can you create common dtsi for both boards
> 
> imx91-11x11-fdrm-common.dtsi
> 
> then imx91-11x11-fdrm-s.dts and imx91-11x11-frdm.dts included
> imx91-11x11-fdrm-common.dtsi.
> 
> You can refer below method
> https://lore.kernel.org/imx/20260204083551.2867263-1-sherry.sun@nxp.com/
> 
> Frank

Hi Frank,

I think the two boards are totally different.
They have different PMIC, no EMMC for FRDM-IMX91S and totally different pin assignment.
So if we create a common dtsi, there will be not much duplicate code can put in.

Regards,
Joseph