linux-kernel - Re: [PATCH 4/4] arm64: dts: allwinner: h6: Add CPU Operating Performance Points table

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Date:   Mon, 18 Feb 2019 10:33:40 +0100
From:   Maxime Ripard <maxime.ripard@...tlin.com>
To:     Frank Lee <tiny.windzz@...il.com>
Cc:     Chen-Yu Tsai <wens@...e.org>, robh+dt@...nel.org,
        mark.rutland@....com,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        devicetree@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 4/4] arm64: dts: allwinner: h6: Add CPU Operating
 Performance Points table

Hi,

On Fri, Feb 15, 2019 at 10:09:51PM +0800, Frank Lee wrote:
> On Fri, Feb 15, 2019 at 9:56 PM Maxime Ripard <maxime.ripard@...tlin.com> wrote:
> >
> > Hi
> >
> > On Fri, Feb 15, 2019 at 12:56:03AM +0800, Frank Lee wrote:
> > > How about to implement a thermal driver that is not integrated with
> > > gpadc ？
> > >
> > > GPADC on soc is rarely used now.
> >
> > You mean GPADC in general, or the gpadc driver in particular?
> > Otherwise, yes, having a driver for the thermal sensor in the H6
> > sounds like a good plan for thermal throttling, but I don't see it as
> > a dependency for that whole series.
>
> At present, sunxi's thermal driver is integrated with the gpadc driver.
> I have a idea to implement the thermal driver alone. I haven't started yet,
> and it may take a while to do it.
> 
> How about the plan to implement a thermal drive alone and put i
> under drivers/thermal?

The Thermal Sensor is basically a stripped down GPADC, which is why it
would make sense to have a single driver.

There was a pending series doing this that could be a good idea to
improve and merge:
https://lkml.org/lkml/2018/8/30/729

Maxime

-- 
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

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