linux-kernel - Re: [PATCH 05/13] thermal: rcar: Document SoC-specific bindings

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Date:	Tue, 15 Jul 2014 19:16:06 -0700 (PDT)
From:	Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
To:	Zhang Rui <rui.zhang@...el.com>
Cc:	Simon Horman <horms@...ge.net.au>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Magnus Damm <magnus.damm@...il.com>,
	devicetree@...r.kernel.org, linux-sh@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Eduardo Valentin <eduardo.valentin@...com>,
	linux-pm@...r.kernel.org
Subject: Re: [PATCH 05/13] thermal: rcar: Document SoC-specific bindings


Hi

> > > The documentation only mentioned the generic fallback compatible property.
> > > Add the missing SoC-specific compatible properties, some of which are
> > > already in use.
> > > 
> > > Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
> > > Cc: Zhang Rui <rui.zhang@...el.com>
> > > Cc: Eduardo Valentin <eduardo.valentin@...com>
> > > Cc: linux-pm@...r.kernel.org
> > 
> > Acked-by: Simon Horman <horms+renesas@...ge.net.au>
> 
> Kuninori,
> 
> what' your opinion of this patch?
> 
> thanks,
> rui
> > 
> > > ---
> > >  .../devicetree/bindings/thermal/rcar-thermal.txt       | 18 ++++++++++++------
> > >  1 file changed, 12 insertions(+), 6 deletions(-)
> > > 
> > > diff --git a/Documentation/devicetree/bindings/thermal/rcar-thermal.txt b/Documentation/devicetree/bindings/thermal/rcar-thermal.txt
> > > index 28ef498a66e5..0ef00be44b01 100644
> > > --- a/Documentation/devicetree/bindings/thermal/rcar-thermal.txt
> > > +++ b/Documentation/devicetree/bindings/thermal/rcar-thermal.txt
> > > @@ -1,7 +1,13 @@
> > >  * Renesas R-Car Thermal
> > >  
> > >  Required properties:
> > > -- compatible		: "renesas,rcar-thermal"
> > > +- compatible		: "renesas,thermal-<soctype>", "renesas,rcar-thermal"
> > > +			  as fallback.
> > > +			  Examples with soctypes are:
> > > +			    - "renesas,thermal-r8a73a4" (R-Mobile AP6)
> > > +			    - "renesas,thermal-r8a7779" (R-Car H1)
> > > +			    - "renesas,thermal-r8a7790" (R-Car H2)
> > > +			    - "renesas,thermal-r8a7791" (R-Car M2)
> > >  - reg			: Address range of the thermal registers.
> > >  			  The 1st reg will be recognized as common register
> > >  			  if it has "interrupts".
> > > @@ -12,18 +18,18 @@ Option properties:
> > >  
> > >  Example (non interrupt support):
> > >  
> > > -thermal@...f0100 {
> > > -	compatible = "renesas,rcar-thermal";
> > > -	reg = <0xe61f0100 0x38>;
> > > +thermal@...48000 {
> > > +	compatible = "renesas,thermal-r8a7779", "renesas,rcar-thermal";
> > > +	reg = <0xffc48000 0x38>;
> > >  };
> > >  
> > >  Example (interrupt support):
> > >  
> > >  thermal@...f0000 {
> > > -	compatible = "renesas,rcar-thermal";
> > > +	compatible = "renesas,thermal-r8a73a4", "renesas,rcar-thermal";
> > >  	reg = <0xe61f0000 0x14
> > >  		0xe61f0100 0x38
> > >  		0xe61f0200 0x38
> > >  		0xe61f0300 0x38>;
> > > -	interrupts = <0 69 4>;
> > > +	interrupts = <0 69 IRQ_TYPE_LEVEL_HIGH>;
> > >  };

This patch and [12/13] are adding SoC-specific compatible name.
Of course we don't know future request,
and, adding SoC-specific compatible name for
fallbacking is nice safety for us.
So, I don't have strong objection about it.

But, thermal driver side do nothing for each
SoC-specific compatible name at this point.
This means

 -> There is no trouble in driver/SoC
 -> Add new (and not used) compatible name
 -> Nothing happen in driver/SoC

My questions are...
 1) How to verify this patch ?
 2) Do we need to update example SoC "specific name" list in rcar-thermal.txt.
    Few example codes are very enough ?
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