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Date:   Tue, 11 Sep 2018 11:12:32 +0200
From:   Maxime Ripard <maxime.ripard@bootlin.com>
To:     Rob Herring <robh@kernel.org>
Cc:     Philipp Rossak <embed3d@gmail.com>, lee.jones@linaro.org,
        mark.rutland@arm.com, wens@csie.org, linux@armlinux.org.uk,
        jic23@kernel.org, knaack.h@gmx.de, lars@metafoo.de,
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        clabbe.montjoie@gmail.com, quentin.schulz@bootlin.com,
        geert+renesas@glider.be, lukas@wunner.de, icenowy@aosc.io,
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        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        linux-sunxi@googlegroups.com
Subject: Re: [PATCH v3 14/30] dt-bindings: update the Allwinner GPADC device
 tree binding for H3 & A83T
Message-ID: <20180911091232.2ozypemfam5kayef@flea>
References: <20180830154518.29507-1-embed3d@gmail.com>
 <20180830154518.29507-15-embed3d@gmail.com>
 <20180831084854.q2uh63pw5vprqlzt@flea>
 <20180910194424.GA21461@bogus>
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On Mon, Sep 10, 2018 at 02:44:24PM -0500, Rob Herring wrote:
> On Fri, Aug 31, 2018 at 10:48:54AM +0200, Maxime Ripard wrote:
> > On Thu, Aug 30, 2018 at 05:45:02PM +0200, Philipp Rossak wrote:
> > > Allwinner H3 features a thermal sensor like the one in A33, but has i=
ts
> > > register re-arranged, the clock divider moved to CCU (originally the
> > > clock divider is in ADC) and added a pair of bus clock and reset.
> > >=20
> > > Allwinner A83T features a thermal sensor similar to the H3, the ths c=
lock,
> > > the bus clock and the reset was removed from the CCU. The THS in A83T
> > > has a clock that is directly connected and runs with 24 MHz.
> > >=20
> > > Update the binding document to cover H3 and A83T.
> > >=20
> > > Signed-off-by: Philipp Rossak <embed3d@gmail.com>
> >=20
> > You probably want to have a look at:
> > https://www.spinics.net/lists/arm-kernel/msg670167.html
>=20
> Well, which is it? An ADC or thermal sensor?

It's both actually. This IP used to be called GPADC, and had a thermal
sensor + some ADC channels. The design evolved across several
generations of SoCs to drop the ADC channels and be used only to have
thermal sensors.

Maxime

--=20
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

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