From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Thu, 12 Jan 2017 17:52:44 +0100
From: Maxime Ripard <maxime.ripard@free-electrons.com>
To: Icenowy Zheng <icenowy@aosc.xyz>
Subject: Re: [linux-sunxi] Re: [PATCH 4/5] ARM: dts: sunxi: add dtsi file for
 V3s SoC
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Cc: devicetree@vger.kernel.org, linux-doc@vger.kernel.org,
 Linus Walleij <linus.walleij@linaro.org>, Stephen Boyd <sboyd@codeaurora.org>,
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On Wed, Jan 11, 2017 at 11:56:32AM +0800, Icenowy Zheng wrote:
>=20
> 2017=E5=B9=B41=E6=9C=8811=E6=97=A5 02:21=E4=BA=8E Maxime Ripard <maxime.r=
ipard@free-electrons.com>=E5=86=99=E9=81=93=EF=BC=9A
> >
> > On Tue, Jan 03, 2017 at 11:16:28PM +0800, Icenowy Zheng wrote:=20
> > > + uart0_pins_a: uart0@0 {=20
> > > + pins =3D "PB8", "PB9";=20
> > > + function =3D "uart0";=20
> > > + bias-pull-up;=20
> >
> > Why do you need a pullup here?=20
>=20
> I think TX needs one, but RX do not need.

That's (at best) board specific. So it belongs in the DTS if it's
truely needed.

Maxime

--=20
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

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