linux-kernel - Re: [PATCH] thermal: rcar: enable to set tripN-temp via DT

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Date:	Wed, 25 Nov 2015 05:23:50 +0000
From:	Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
To:	Eduardo Valentin <edubezval@...il.com>
CC:	Zhang Rui <rui.zhang@...el.com>, Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>, <linux-pm@...r.kernel.org>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	Ryusuke Sakato <ryusuke.sakato.bx@...esas.com>,
	"osd2@...renesas.com" <osd2@...renesas.com>,
	<linux-sh@...r.kernel.org>
Subject: Re: [PATCH] thermal: rcar: enable to set tripN-temp via DT


Hi Eduardo

Thank you for your feedback

> > From: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
> > 
> > Current rcar thermal driver is using 90 degrees as trip temp, but it
> > should be based on each SoC / platform.
> > This patch enables to set trip temp via DT. (It uses db8500-thermal
> > style for it)
> > It will use 90 degrees as default trip temp if DT doesn't have it.
> > 
> > Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
> > ---
> >  .../devicetree/bindings/thermal/rcar-thermal.txt   |  2 ++
> >  drivers/thermal/rcar_thermal.c                     | 34 ++++++++++++++++++++--
> >  2 files changed, 33 insertions(+), 3 deletions(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/thermal/rcar-thermal.txt b/Documentation/devicetree/bindings/thermal/rcar-thermal.txt
> > index 332e625..6c57f7e 100644
> > --- a/Documentation/devicetree/bindings/thermal/rcar-thermal.txt
> > +++ b/Documentation/devicetree/bindings/thermal/rcar-thermal.txt
> > @@ -18,6 +18,8 @@ Required properties:
> >  Option properties:
> >  
> >  - interrupts		: use interrupt
> > +- tripN-temp		: temperature of trip point N. it will use 90000 as default
> > +			  if DT doesn't have tripN-temp
> 
> First of all, you are creating an entry with is specific to your driver.
> That requires it to use proper prefixing.
> 
> Besides, your property is already covered by of-thermal. Please convert
> your driver to use of-thermal, this way it will give you the flexibility
> to configure thermal data in DT.

I see, but we need to keep compatibility for non-DT SoC.
(This driver is used from both DT, non-DT SoC)

Then, I noticed we can use .set_trip_temp, and it is very enough for us.

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