Re: [PATCH 1/2] i2c: add binding to prevent device detection

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On Tue, Apr 05, 2022 at 03:57:16PM +0200, Krzysztof Kozlowski wrote:
> On 05/04/2022 14:16, Vincent Whitchurch wrote:
> >  Documentation/devicetree/bindings/i2c/i2c.txt | 4 ++++
> 
> Use the subject matching the subsystem (git log --oneline -- .......).

I did look at the git log when writing the subject, but there's a bunch
of variation there so I went for the subject prefix which Wolfram
himself used since I assumed he would be the one applying these patches.

$ git log -n5 --oneline origin/master -- Documentation/devicetree/bindings/i2c/i2c.txt
6881e493b08f dt-bindings: net: New binding mctp-i2c-controller
168290fb2675 i2c: add binding to mark a bus as supporting SMBus-Alert
e6277308ac21 i2c: add binding to mark a bus as SMBus
db36e827d876 dt-bindings: i2c: add generic properties for GPIO bus recovery
fad5972a1eca i2c: add 'single-master' property to generic bindings

> 
> >  1 file changed, 4 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/i2c/i2c.txt b/Documentation/devicetree/bindings/i2c/i2c.txt
> > index fc3dd7ec0445..5f7bdf4851e8 100644
> > --- a/Documentation/devicetree/bindings/i2c/i2c.txt
> > +++ b/Documentation/devicetree/bindings/i2c/i2c.txt
> > @@ -72,6 +72,10 @@ wants to support one of the below features, it should adapt these bindings.
> >  	this information to adapt power management to keep the arbitration awake
> >  	all the time, for example. Can not be combined with 'single-master'.
> >  
> > +- no-detect
> > +	states that the system should not attempt to automatically detect
> > +	devices which are not explicitly specified as child nodes.
> 
> Focus on the hardware, not on system and behavior. The hardware property
> is that bus is completely described in Devicetree or detection does not
> work correctly. I guess the property name could stay like this, but the
> description could be rephrased.

I'm having a hard time drawing the line between hardware and the
"system" here.  The bus being completely described in devicetree doesn't
sound like a hardware property to me, but, yes, I can change the
description to say that.



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