linux-kernel - Re: [PATCH v4 5/9] dt-bindings: connector: Add PCIe M.2 Mechanical Key E connector

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Message-ID: <pfyzilu4xpggftei4th37uv7wb4gpfsntjlagctsydrrc35qci@4uyd3zog6t7j>
Date: Thu, 15 Jan 2026 16:14:41 +0530
From: Manivannan Sadhasivam <mani@...nel.org>
To: Rob Herring <robh@...nel.org>
Cc: Manivannan Sadhasivam <manivannan.sadhasivam@....qualcomm.com>, 
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Jiri Slaby <jirislaby@...nel.org>, 
	Nathan Chancellor <nathan@...nel.org>, Nicolas Schier <nicolas.schier@...ux.dev>, 
	Hans de Goede <hansg@...nel.org>, Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>, 
	Mark Pearson <mpearson-lenovo@...ebb.ca>, "Derek J. Clark" <derekjohn.clark@...il.com>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Marcel Holtmann <marcel@...tmann.org>, Luiz Augusto von Dentz <luiz.dentz@...il.com>, 
	Bartosz Golaszewski <brgl@...ev.pl>, Andy Shevchenko <andriy.shevchenko@...ux.intel.com>, 
	Bartosz Golaszewski <brgl@...nel.org>, linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-kbuild@...r.kernel.org, platform-driver-x86@...r.kernel.org, linux-pci@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-arm-msm@...r.kernel.org, linux-bluetooth@...r.kernel.org, 
	linux-pm@...r.kernel.org, Stephan Gerhold <stephan.gerhold@...aro.org>, 
	Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>, linux-acpi@...r.kernel.org
Subject: Re: [PATCH v4 5/9] dt-bindings: connector: Add PCIe M.2 Mechanical
 Key E connector

On Tue, Jan 13, 2026 at 11:16:01AM -0600, Rob Herring wrote:
> On Mon, Jan 12, 2026 at 09:56:04PM +0530, Manivannan Sadhasivam wrote:
> > Add the devicetree binding for PCIe M.2 Mechanical Key E connector defined
> > in the PCI Express M.2 Specification, r4.0, sec 5.1.2. This connector
> > provides interfaces like PCIe or SDIO to attach the WiFi devices to the
> > host machine, USB or UART+PCM interfaces to attach the Bluetooth (BT)
> > devices. Spec also provides an optional interface to connect the UIM card,
> > but that is not covered in this binding.
> > 
> > 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-e-connector.yaml    | 154 +++++++++++++++++++++
> >  MAINTAINERS                                        |   1 +
> >  2 files changed, 155 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/connector/pcie-m2-e-connector.yaml b/Documentation/devicetree/bindings/connector/pcie-m2-e-connector.yaml
> > new file mode 100644
> > index 000000000000..b65b39ddfd19
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/connector/pcie-m2-e-connector.yaml
> > @@ -0,0 +1,154 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/connector/pcie-m2-e-connector.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: PCIe M.2 Mechanical Key E Connector
> > +
> > +maintainers:
> > +  - Manivannan Sadhasivam <manivannan.sadhasivam@....qualcomm.com>
> > +
> > +description:
> > +  A PCIe M.2 E connector node represents a physical PCIe M.2 Mechanical Key E
> > +  connector. Mechanical Key E connectors are used to connect Wireless
> > +  Connectivity devices including combinations of Wi-Fi, BT, NFC to the host
> > +  machine over interfaces like PCIe/SDIO, USB/UART+PCM, and I2C.
> > +
> > +properties:
> > +  compatible:
> > +    const: pcie-m2-e-connector
> > +
> > +  vpcie3v3-supply:
> > +    description: A phandle to the regulator for 3.3v supply.
> > +
> > +  vpcie1v8-supply:
> > +    description: A phandle to the regulator for VIO 1.8v supply.
> > +
> > +  ports:
> 
> Also, nodes go after all properties.
> 

Ack.

- Mani

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