linux-kernel - Re: [PATCH 1/4] dt-bindings: connector: Add PCIe M.2 Mechanical Key M connector

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Message-ID: <20251106-legibly-resupply-1d3cef545229@spud>
Date: Thu, 6 Nov 2025 17:57:17 +0000
From: Conor Dooley <conor@...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>, 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>
Subject: Re: [PATCH 1/4] dt-bindings: connector: Add PCIe M.2 Mechanical Key
 M connector

On Wed, Nov 05, 2025 at 02:45:49PM +0530, Manivannan Sadhasivam wrote:
> Add the devicetree binding for PCIe M.2 Mechanical Key M connector. This
> connector provides interfaces like PCIe and SATA to attach the Solid State
> Drives (SSDs) to the host machine along with additional interfaces like
> USB, and SMB for debugging and supplementary features. At any point of
> time, the connector can only support either PCIe or SATA as the primary
> host interface.
> 
> The connector provides a primary power supply of 3.3v, along with an
> optional 1.8v VIO supply for the Adapter I/O buffer circuitry operating at
> 1.8v sideband signaling.
> 
> The connector also supplies optional signals in the form of GPIOs for fine
> grained power management.
> 
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@....qualcomm.com>
> ---
>  .../bindings/connector/pcie-m2-m-connector.yaml    | 121 +++++++++++++++++++++
>  1 file changed, 121 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/connector/pcie-m2-m-connector.yaml b/Documentation/devicetree/bindings/connector/pcie-m2-m-connector.yaml
> new file mode 100644
> index 0000000000000000000000000000000000000000..2db23e60fdaefabde6f208e4ae0c9dded3a513f6
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/connector/pcie-m2-m-connector.yaml
> @@ -0,0 +1,121 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/connector/pcie-m2-m-connector.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: PCIe M.2 Mechanical Key M Connector
> +
> +maintainers:
> +  - Manivannan Sadhasivam <manivannan.sadhasivam@....qualcomm.com>
> +
> +description:
> +  A PCIe M.2 M connector node represents a physical PCIe M.2 Mechanical Key M
> +  connector. The Mechanical Key M connectors are used to connect SSDs to the
> +  host system over PCIe/SATA interfaces. These connectors also offer optional
> +  interfaces like USB, SMB.
> +
> +properties:
> +  compatible:
> +    const: pcie-m2-m-connector

Is this something generated from a standard that's going to be
practically identical everywhere, or just some qcom thing?

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