linux-kernel - Re: [PATCH v4 0/5] PCI: Add initial support for handling PCIe M.2 connectors in devicetree

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Message-ID: <aVOcgDeOejO9m1zE@ryzen>
Date: Tue, 30 Dec 2025 10:33:52 +0100
From: Niklas Cassel <cassel@...nel.org>
To: Manivannan Sadhasivam <manivannan.sadhasivam@....qualcomm.com>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>,
	Manivannan Sadhasivam <mani@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Bartosz Golaszewski <brgl@...ev.pl>,
	Damien Le Moal <dlemoal@...nel.org>,
	Linus Walleij <linus.walleij@...aro.org>,
	Bartosz Golaszewski <brgl@...nel.org>, linux-kernel@...r.kernel.org,
	linux-pci@...r.kernel.org, devicetree@...r.kernel.org,
	linux-arm-msm@...r.kernel.org,
	Stephan Gerhold <stephan.gerhold@...aro.org>,
	Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>,
	linux-pm@...r.kernel.org, linux-ide@...r.kernel.org,
	Frank Li <Frank.Li@....com>,
	Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: Re: [PATCH v4 0/5] PCI: Add initial support for handling PCIe M.2
 connectors in devicetree

Hello Mani,

On Sun, Dec 28, 2025 at 10:31:00PM +0530, Manivannan Sadhasivam wrote:
> The Mechanical Key M connector is used to connect SSDs to the host machine over
> PCIe/SATA interfaces. Due to the hardware constraints, this series only adds
> support for driving the PCIe interface of the connector in the kernel.

Since this series does not add any support for SATA, do we really want to
modify the SATA device tree binding?

I know that device tree describes the hardware, but if there is no software
that makes use of this, the SATA DT binding change feels a bit unnecessary.

Do we perhaps want to defer modifying the SATA DT binding change until the
corresponding change in software is added?


Kind regards,
Niklas