linux-kernel - Re: [PATCH 2/3] thermal: sun50i: add thermal driver for h6

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Message-ID: <20190526012444.yrcellg3xdrt3bo5@core.my.home>
Date:   Sun, 26 May 2019 03:24:44 +0200
From:   Ondřej Jirman <megous@...ous.com>
To:     Frank Lee <tiny.windzz@...il.com>
Cc:     rui.zhang@...el.com, Eduardo Valentin <edubezval@...il.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>, robh+dt@...nel.org,
        Mark Rutland <mark.rutland@....com>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Chen-Yu Tsai <wens@...e.org>, catalin.marinas@....com,
        will.deacon@....com, David Miller <davem@...emloft.net>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jonathan.Cameron@...wei.com,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        paulmck@...ux.ibm.com, Andy Gross <andy.gross@...aro.org>,
        olof@...om.net, bjorn.andersson@...aro.org,
        Jagan Teki <jagan@...rulasolutions.com>,
        marc.w.gonzalez@...e.fr, stefan.wahren@...e.com,
        enric.balletbo@...labora.com, devicetree@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux PM <linux-pm@...r.kernel.org>
Subject: Re: [PATCH 2/3] thermal: sun50i: add thermal driver for h6

Hello Yangtao,

On Sun, May 26, 2019 at 02:48:13AM +0800, Frank Lee wrote:
> On Sun, May 19, 2019 at 10:22 PM Ondřej Jirman <megous@...ous.com> wrote:
> >
> > I know, I don't think it needs to be per-soc. These actions are all shared by
> > all SoCs. Maybe with an exception that some SoCs may need one more clock, but
> > that can be made optionally-required by some flag in struct sunxi_thermal_chip.
> >
> > Only highly SoC specific thing is configuring the THS registers for sampling
> > frequency/averaging/enabling interrupts. The reset/clock enable is generic, and
> > already abstracted by the clock/reset framework.
> >
> > So what I suggest is having:
> >
> > sunxi_ths_enable()
> >         reset deassert
> >         bus clock prepare enable
> >         optionally module clock prepare enable (in the future)
> >         call per-soc calibration
> >         call per-soc setup callback
> >
> > sunxi_ths_disable()
> >         reset assert
> >         bus clock unprepare disable
> >         optionally module clock unprepare disable
> >
> > And if you could move devm_nvmem_cell_get to probe that should make per-SoC
> > calibration callback also less repetitive and could avoid undoing the enable
> > in case it returns EPROBE_DEFER (which is possible).
> >
> > All this should make it easier to support PM in the future and add less
> > cumbersome to add support for A83T and H3/H5.
> >
> > BTW, what are your plans for more SoC support? I'd like to add support for
> > A83T and H3/H5, maybe even during the 5.3 cycle if this driver happens to land
> > early enough. If you don't have any plans I'll take it on.
> >
> 
> I plan to support h3 and a33 later.
> Can you support other platforms?

Yes, I can do A83T. H5 is similar (the same?) as H3.

thank you and regards,
	o.

> Cheers,
> Yangtao
> 
> > thank you and regards,
> >         o.
> >
> > > >
> > > > thank you and regards,
> > > >         o.
> > > >
> > > > > Regards,
> > > > > Yangtao
> > >
> > > _______________________________________________
> > > linux-arm-kernel mailing list
> > > linux-arm-kernel@...ts.infradead.org
> > > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
> 
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