linux-kernel - Re: [PATCH v2 03/12] dt-bindings: extcon: document Samsung S2M series PMIC extcon device

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Message-Id: <DG7XG932U7G5.2VJWCJRZEERI0@disroot.org>
Date: Fri, 06 Feb 2026 19:22:54 +0530
From: "Kaustabh Chakraborty" <kauschluss@...root.org>
To: "Rob Herring" <robh@...nel.org>, "Kaustabh Chakraborty"
 <kauschluss@...root.org>
Cc: "Lee Jones" <lee@...nel.org>, "Pavel Machek" <pavel@...nel.org>,
 "Krzysztof Kozlowski" <krzk+dt@...nel.org>, "Conor Dooley"
 <conor+dt@...nel.org>, "MyungJoo Ham" <myungjoo.ham@...sung.com>, "Chanwoo
 Choi" <cw00.choi@...sung.com>, "Sebastian Reichel" <sre@...nel.org>,
 "Krzysztof Kozlowski" <krzk@...nel.org>, André Draszik
 <andre.draszik@...aro.org>, "Alexandre Belloni"
 <alexandre.belloni@...tlin.com>, "Jonathan Corbet" <corbet@....net>, "Shuah
 Khan" <skhan@...uxfoundation.org>, <linux-leds@...r.kernel.org>,
 <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
 <linux-pm@...r.kernel.org>, <linux-samsung-soc@...r.kernel.org>,
 <linux-rtc@...r.kernel.org>, <linux-doc@...r.kernel.org>
Subject: Re: [PATCH v2 03/12] dt-bindings: extcon: document Samsung S2M
 series PMIC extcon device

On 2026-02-06 07:49 -06:00, Rob Herring wrote:
> On Mon, Jan 26, 2026 at 12:37:10AM +0530, Kaustabh Chakraborty wrote:
>> Certain Samsung S2M series PMICs have a MUIC device which reports
>> various cable states by measuring the ID-GND resistance with an internal
>> ADC. Document the devicetree schema for this device.
>> 
>> Signed-off-by: Kaustabh Chakraborty <kauschluss@...root.org>
>> ---
>>  .../bindings/extcon/samsung,s2mu005-muic.yaml      | 35 ++++++++++++++++++++++
>>  1 file changed, 35 insertions(+)
>> 
>> diff --git a/Documentation/devicetree/bindings/extcon/samsung,s2mu005-muic.yaml b/Documentation/devicetree/bindings/extcon/samsung,s2mu005-muic.yaml
>> new file mode 100644
>> index 0000000000000..05828b7b5be13
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/extcon/samsung,s2mu005-muic.yaml
>> @@ -0,0 +1,35 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/extcon/samsung,s2mu005-muic.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Extcon Device for Samsung S2M series PMICs
>> +
>> +maintainers:
>> +  - Kaustabh Chakraborty <kauschluss@...root.org>
>> +
>> +description: |
>> +  The Samsung S2M series PMIC extcon device is a USB port accessory
>
> extcon is a Linuxism. Use usb-connector binding.
>
>> +  detector. It reports multiple states depending on the ID-GND
>> +  resistance measured by an internal ADC.
>> +
>> +  This is a part of device tree bindings for S2M and S5M family of Power
>> +  Management IC (PMIC).
>> +
>> +  See also Documentation/devicetree/bindings/mfd/samsung,s2mps11.yaml for
>> +  additional information and example.
>> +
>> +properties:
>> +  compatible:
>> +    enum:
>> +      - samsung,s2mu005-muic
>> +
>> +  port:
>> +    $ref: /schemas/graph.yaml#/properties/port
>
> What does the port connect to?

I have it connected to the USB PHY in device tree.

>
>> +
>> +required:
>> +  - compatible
>> +  - port
>> +
>> +additionalProperties: false
>> 
>> -- 
>> 2.52.0
>>