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

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Message-ID: <6fa4ea12-bc7d-4977-8b7e-bfbea2ef2955@foss.st.com>
Date:   Tue, 11 Jul 2023 14:36:11 +0200
From:   Alexandre TORGUE <alexandre.torgue@...s.st.com>
To:     Oleksij Rempel <o.rempel@...gutronix.de>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Jérôme Pouiller <jerome.pouiller@...abs.com>
CC:     <kernel@...gutronix.de>, <linux-kernel@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <netdev@...r.kernel.org>
Subject: Re: [PATCH v1] ARM: dts: stm32: prtt1c: Add PoDL PSE regulator nodes

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>
> ---

Applied on stm32-next.

cheers
Alex