linux-kernel - Re: [PATCH v9 0/7] Add DDR4 memory-controller bindings and factorise LPDDR and DDR bindings

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Message-ID: <e969f825-800e-478e-b82b-7fa7da5be881@foss.st.com>
Date: Thu, 8 Jan 2026 17:52:07 +0100
From: Alexandre TORGUE <alexandre.torgue@...s.st.com>
To: Clément Le Goffic <legoffic.clement@...il.com>,
        "Krzysztof Kozlowski" <krzk@...nel.org>, Rob Herring <robh@...nel.org>,
        Conor
 Dooley <conor+dt@...nel.org>,
        Julius Werner <jwerner@...omium.org>,
        "Krzysztof Kozlowski" <krzk+dt@...nel.org>,
        Maxime Coquelin
	<mcoquelin.stm32@...il.com>
CC: <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        Clément Le Goffic
	<clement.legoffic@...s.st.com>,
        Krzysztof Kozlowski
	<krzysztof.kozlowski@...aro.org>
Subject: Re: [PATCH v9 0/7] Add DDR4 memory-controller bindings and factorise
 LPDDR and DDR bindings

Hi Clément

On 11/18/25 16:07, Clément Le Goffic wrote:
> Introduce DDR4 bindings, which is the first DDR type to be added.
> As the DDR and LPDDR use the same properties, factorise them in a
> sdram-props bindings file and rename lpddr-channel into sdram-channel.
> 
> Changes in v9:
> - In the ddr4 compatible pattern :
>      s/ddrX-YYYY,AAAA...,ZZ/ddrX-YYYY,AAAA...-ZZ/
>      The comma before the "ZZ" part has been replaced with a minus.
> - Add information about how the compatible is constructed in the patch 2:
>    "dt-bindings: memory: introduce DDR4"
> - Add Krzysztof Kozlowski's trailer on patch 1
> - Link to v8: https://lore.kernel.org/r/20250930-b4-ddr-bindings-v8-0-fe4d8c015a50@gmail.com
> 
> Changes in v8:
> - Globally fix typo/grammar in SDRAM props bindings:
>    - DDR4 bindings compatible description:
>      - s/lpddrX,YY,ZZZZ/lpddrX-YY,ZZZZ/
>      - s/in lower case/lowercase/
>      - s/statis/static/
>      - s/~/-/
>    - Add an "s" where a plural form is used (e.g. registers) in the DDR4
>      binding revision-id description
> - Fix the number of chars that an SPD can contain in the part number
>    field.
> - Link to v7: https://lore.kernel.org/r/20250922-b4-ddr-bindings-v7-0-b3dd20e54db6@gmail.com
> 
> The v7 is a subset of the v6 and other prior versions, split to simplify
> the review and merging process.
> 
> Changes in v7:
> - None
> - Link to v6: https://lore.kernel.org/all/20250909-b4-ddrperfm-upstream-v6-5-ce082cc801b5@gmail.com/
> 
> Signed-off-by: Clément Le Goffic <legoffic.clement@...il.com>
> ---
> Clément Le Goffic (7):
>        dt-bindings: memory: factorise LPDDR props into SDRAM props
>        dt-bindings: memory: introduce DDR4
>        dt-bindings: memory: factorise LPDDR channel binding into SDRAM channel
>        dt-binding: memory: add DDR4 channel compatible
>        dt-bindings: memory: SDRAM channel: standardise node name
>        arm64: dts: st: add LPDDR channel to stm32mp257f-dk board
>        arm64: dts: st: add DDR channel to stm32mp257f-ev1 board
> 

DT patches [6]&[7] applied on stm32-next.

Regards
Alex