linux-kernel - Re: [RFC v2 1/5] dt-bindings: pinctrl: document polarfire soc mssio pin controller

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Message-ID: <20251218-stack-trilogy-5ae1d795cb17@spud>
Date: Thu, 18 Dec 2025 00:59:25 +0000
From: Conor Dooley <conor@...nel.org>
To: Rob Herring <robh@...nel.org>
Cc: linus.walleij@...aro.org, Conor Dooley <conor.dooley@...rochip.com>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
	devicetree@...r.kernel.org, Valentina.FernandezAlanis@...rochip.com
Subject: Re: [RFC v2 1/5] dt-bindings: pinctrl: document polarfire soc mssio
 pin controller

On Tue, Dec 16, 2025 at 04:16:31PM -0600, Rob Herring wrote:
> On Thu, Nov 27, 2025 at 10:57:57AM +0000, Conor Dooley wrote:
> > +
> > +          microchip,bank-voltage-microvolt:
> > +            description:
> > +              Which bank voltage to use. This cannot differ for pins in a
> > +              given bank, the whole bank uses the same voltage.
> > +            enum: [ 1200000, 1500000, 1800000, 2500000, 3300000 ]
> 
> "power-source" serves this purpose. It's not well defined as sometimes 
> it's a register value and sometimes a voltage (in various units).

I don't recall exactly why I chose not to use that property, because I
did know it existed. I *think* it was because the selection was not per
pin and I wanted to make it clear - but I should probably just use that
property and add the description from above.

> 
> > +
> > +          microchip,clamp-diode:
> > +            $ref: /schemas/types.yaml#/definitions/flag
> > +            description:
> > +              Reflects the "Clamp Diode" setting in the MSS Configurator for
> > +              this pin. This setting controls whether or not input voltage
> > +              clamping should be enabled.

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