linux-kernel - Re: [v3,1/3] thermal: mediatek: Relocate driver to mediatek folder

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Date:   Thu, 22 Apr 2021 16:47:28 +0800
From:   Michael Kao <michael.kao@...iatek.com>
To:     Daniel Lezcano <daniel.lezcano@...aro.org>,
        Zhang Rui <rui.zhang@...el.com>, <linux-pm@...r.kernel.org>,
        <srv_heupstream@...iatek.com>
CC:     Eduardo Valentin <edubezval@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        "Matthias Brugger" <matthias.bgg@...il.com>, <hsinyi@...omium.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>
Subject: Re: [v3,1/3] thermal: mediatek: Relocate driver to mediatek folder

On Tue, 2021-04-20 at 23:22 +0200, Daniel Lezcano wrote:
> On 12/03/2021 04:40, Michael Kao wrote:
> > Add Mediatek proprietary folder to upstream more thermal zone and
> > cooler
> > drivers. Relocate the original thermal controller driver to it and
> > rename
> > as soc_temp.c to show its purpose more clearly.
> 
> We already know the purpose :)
> 
> soc_temp gives no additional information.
> 
> Either keep the name or give the hardware sensor name. It is a driver
> directory.
> 

Dear Daniel,
The new thermal hardware design called lvts (Low voltage thermal
sensor).
Instead of original one using auxadc, the lvts use lvts device to
access thermal senosrs.
It will save power and be more efficient.
We use the config CONFIG_MTK_THERMAL and CONFIG_MTK_SOC_THERMAL_LVTS[1]
to select the different hardware archtecture.

[1] [v3,2/3] thermal: mediatek: Add LVTS drivers for SoC theraml zones

https://patchwork.kernel.org/project/linux-mediatek/patch/20210312034018.17437-3-michael.kao@mediatek.com/

> > Signed-off-by: Michael Kao <michael.kao@...iatek.com>
> > ---
> >  drivers/thermal/Kconfig                       | 14 ++++-------
> >  drivers/thermal/Makefile                      |  2 +-
> >  drivers/thermal/mediatek/Kconfig              | 23
> > +++++++++++++++++++
> >  drivers/thermal/mediatek/Makefile             |  1 +
> >  .../{mtk_thermal.c => mediatek/soc_temp.c}    |  0
> 
> [ ... ]
> 
> vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
> 
> 
> > +config MTK_THERMAL
> > +	tristate "Mediatek thermal drivers"
> > +	depends on THERMAL_OF
> > +	help
> > +	  This is the option for Mediatek thermal software
> > +	  solutions. Please enable corresponding options to
> > +	  get temperature information from thermal sensors or
> > +	  turn on throttle mechaisms for thermal mitigation.
> > +
> > +if MTK_THERMAL
> 
> 
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> 
> All the above not needed.
> 
> > +config MTK_SOC_THERMAL
> > +	tristate "Temperature sensor driver for mediatek SoCs"
> > +	depends on HAS_IOMEM
> > +	depends on NVMEM
> > +	depends on RESET_CONTROLLER
> > +	help
> > +	  Enable this option if you want to get SoC temperature
> > +	  information for Mediatek platforms. This driver
> > +	  configures thermal controllers to collect temperature
> > +	  via AUXADC interface.
> > +
> > +endif
> > diff --git a/drivers/thermal/mediatek/Makefile
> > b/drivers/thermal/mediatek/Makefile
> > new file mode 100644
> > index 000000000000..f75313ddce5e
> > --- /dev/null
> > +++ b/drivers/thermal/mediatek/Makefile
> > @@ -0,0 +1 @@
> > +obj-$(CONFIG_MTK_SOC_THERMAL)	+= soc_temp.o
> > diff --git a/drivers/thermal/mtk_thermal.c
> > b/drivers/thermal/mediatek/soc_temp.c
> > similarity index 100%
> > rename from drivers/thermal/mtk_thermal.c
> > rename to drivers/thermal/mediatek/soc_temp.c
> 
> 
>