linux-kernel - Re: [PATCH v1] ARM: dts: stm32: prtt1c: Add PoDL PSE regulator nodes

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Message-ID: <509b45f9-b6f1-d6a1-c76f-1047efc2334c@foss.st.com>
Date:   Mon, 3 Apr 2023 09:48:26 +0200
From:   Alexandre TORGUE <alexandre.torgue@...s.st.com>
To:     Oleksij Rempel <o.rempel@...gutronix.de>
CC:     Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Jérôme Pouiller <jerome.pouiller@...abs.com>,
        <devicetree@...r.kernel.org>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <kernel@...gutronix.de>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v1] ARM: dts: stm32: prtt1c: Add PoDL PSE regulator nodes

Hi Oleksij

On 3/28/23 13:02, Oleksij Rempel wrote:
> On Tue, Mar 28, 2023 at 11:58:34AM +0200, Alexandre TORGUE wrote:
>> Hi Oleksij
>>
>> On 3/23/23 13:32, Oleksij Rempel wrote:
>>> This commit introduces Power over Data Line (PoDL) Power Source
>>> Equipment (PSE) regulator nodes to the PRTT1C devicetree. The addition
>>> of these nodes enables support for PoDL in PRTT1C devices, allowing
>>> power delivery and data transmission over a single twisted pair.
>>>
>>> The new PoDL PSE regulator nodes provide voltage capability information
>>> of the current board design, which can be used as a hint for system
>>> administrators when configuring and managing power settings. This
>>> update enhances the versatility and simplifies the power management of
>>> PRTT1C devices while ensuring compatibility with connected Powered
>>> Devices (PDs).
>>>
>>> After applying this patch, the power delivery can be controlled from
>>> user space with a patched [1] ethtool version using the following commands:
>>>     ethtool --set-pse t1l2 podl-pse-admin-control enable
>>> to enable power delivery, and
>>>     ethtool --show-pse t1l2
>>> to display the PoDL PSE settings.
>>>
>>> By integrating PoDL PSE support into the PRTT1C devicetree, users can
>>> benefit from streamlined power and data connections in their
>>> deployments, improving overall system efficiency and reducing cabling
>>> complexity.
>>>
>>> [1] https://lore.kernel.org/all/20230317093024.1051999-1-o.rempel@pengutronix.de/
>>>
>>> Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
>>> ---
>>
>> Please, fix the introduction of those new yaml validation errors:
>>
>> arch/arm/boot/dts/stm32mp151a-prtt1c.dtb: ethernet-pse-1: $nodename:0:
>> 'ethernet-pse-1' does not match '^ethernet-pse(@.*)?$'
>>          From schema:
>> /Documentation/devicetree/bindings/net/pse-pd/podl-pse-regulator.yaml
>> arch/arm/boot/dts/stm32mp151a-prtt1c.dtb: ethernet-pse-2: $nodename:0:
>> 'ethernet-pse-2' does not match '^ethernet-pse(@.*)?$'
>>          From schema: /local/home/frq08678/STLINUX/kernel/my-kernel/stm32/Documentation/devicetree/bindings/net/pse-pd/podl-pse-regulator.yaml
> 
> Using ethernet-pse@1 will require to use "reg" or "ranges" properties.
> Which makes no sense in this use case. I need to fix the schema instead by
> allowing this patter with following regex: "^ethernet-pse(@.*|-[0-9a-f])*$"
> 
> Should I send schema fix together with this patch?

Yes you can. As soon as Rob or Krzysztof review it I'll apply both on 
stm32-next.

Thanks
Alex




> Regards,
> Oleksij