linux-kernel - Re: [PATCH v3 3/4] dt-bindings: spi: stm32: disable spi-slave property for stm32f4-f7

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 15 Jun 2023 22:20:25 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Valentin CARON <valentin.caron@...s.st.com>,
        Mark Brown <broonie@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Alain Volmat <alain.volmat@...s.st.com>
Cc:     linux-spi@...r.kernel.org, devicetree@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 3/4] dt-bindings: spi: stm32: disable spi-slave
 property for stm32f4-f7

On 15/06/2023 19:38, Valentin CARON wrote:
> Hi Krzysztof,
> 
> On 6/15/23 15:36, Krzysztof Kozlowski wrote:
>> On 15/06/2023 09:58, Valentin Caron wrote:
>>> From: Alain Volmat <alain.volmat@...s.st.com>
>>>
>>> STM32F4 and STM32F7 can't switch to spi device mode.
>>> Forbid this property with compatible "st,stm32f4-spi".
>> Just to clarify - driver cannot switch or hardware does not support it?
> 
> Driver can't support it right now but hardware can.
> 

DT is independent of some chosen (or current) Linux drivers. Imagine
Linux cannot support it but OpenBSD does.

As Mark pointed out, this needs a follow up commit.

Best regards,
Krzysztof