linux-kernel - Re: [PATCH v2 1/3] dt-bindings: pinctrl: starfive,jh7110: add PAD_INTERNAL

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Message-ID: <34c92033f4bbf289c6048a85f0f6ba04435e7bf8.camel@icenowy.me>
Date: Mon, 28 Apr 2025 16:40:56 +0800
From: Icenowy Zheng <uwu@...nowy.me>
To: Krzysztof Kozlowski <krzk@...nel.org>
Cc: Emil Renner Berthing <kernel@...il.dk>, Jianlong Huang
 <jianlong.huang@...rfivetech.com>, Hal Feng <hal.feng@...rfivetech.com>, 
 Linus Walleij <linus.walleij@...aro.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>,  linux-gpio@...r.kernel.org,
 devicetree@...r.kernel.org,  linux-kernel@...r.kernel.org,
 linux-riscv@...ts.infradead.org
Subject: Re: [PATCH v2 1/3] dt-bindings: pinctrl: starfive,jh7110: add
 PAD_INTERNAL_* virtual pins

在 2025-04-28星期一的 09:20 +0200，Krzysztof Kozlowski写道：
> On Thu, Apr 24, 2025 at 02:20:15PM GMT, Icenowy Zheng wrote:
> > The JH7110 SoC could support internal GPI signals to be routed to
> > not
> > external GPIO but internal low/high levels.
> > 
> > Add two macros, PAD_INTERNAL_LOW and PAD_INTERNAL_HIGH, as two
> > virtual
> > "pads" to represent internal GPI sources with fixed low/high
> > levels.
> > 
> > Signed-off-by: Icenowy Zheng <uwu@...nowy.me>
> > ---
> >  include/dt-bindings/pinctrl/starfive,jh7110-pinctrl.h | 4 ++++
> >  1 file changed, 4 insertions(+)
> > 
> > diff --git a/include/dt-bindings/pinctrl/starfive,jh7110-pinctrl.h
> > b/include/dt-bindings/pinctrl/starfive,jh7110-pinctrl.h
> > index 3865f01396395..3cca874b2bef7 100644
> > --- a/include/dt-bindings/pinctrl/starfive,jh7110-pinctrl.h
> > +++ b/include/dt-bindings/pinctrl/starfive,jh7110-pinctrl.h
> > @@ -126,6 +126,10 @@
> >  #define        PAD_GMAC0_TXEN          18
> >  #define        PAD_GMAC0_TXC           19
> >  
> > +/* virtual pins for forcing GPI */
> > +#define PAD_INTERNAL_LOW       254
> > +#define PAD_INTERNAL_HIGH      255
> 
> Why this cannot be 20 and 21? These are not values for registers, but
> abstract numbers.

The number must not collide with SYS GPIO pads too.

Using 95 and 96 is okay, but dirty.

> 
> Best regards,
> Krzysztof
>