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Message-ID: <CAGb2v64HyUn8KjPPA0JBA5tPaxX7-keNfs+M22pL5SmETN0FQg@mail.gmail.com>
Date: Fri, 6 Nov 2020 10:10:10 +0800
From: Chen-Yu Tsai <wens@...e.org>
To: Maxime Ripard <maxime@...no.tech>
Cc: Rob Herring <robh+dt@...nel.org>, Yu-Tung Chang <mtwget@...il.com>,
devicetree <devicetree@...r.kernel.org>,
linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1 1/1] ARM: dts: sun8i: h3: Add initial NanoPi R1 support
On Fri, Nov 6, 2020 at 10:03 AM Yu-Tung Chang <mtwget@...il.com> wrote:
>
> Maxime Ripard <maxime@...no.tech> 于2020年11月6日周五 上午1:10写道:
> >
> > On Wed, Nov 04, 2020 at 04:07:48PM +0800, Yu-Tung Chang wrote:
> > > > > +&uart1 {
> > > > > + pinctrl-names = "default";
> > > > > + pinctrl-0 = <&uart1_pins>;
> > > >
> > > > This should be already set in the DTSI
> > > >
> > > uart0 as the debugging interface, uart1 as the external uart port,
> > > uart3 as the bluetooth.
> >
> > What I mean is that since it's the only muxing option, the pinctrl
> > properties should already be set in the DTSI, so it's redundant to put
> > them in the DTS.
> >
> I can only see the definition of uart0 in the DTSI,
> because uart1 as the extension interface is exclusive to NanoPi R1.
Maxime, to clarify, UART1 can be used with or without RTS/CTS,
so there is no default muxing in the DTSI.
ChenYu
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