linux-kernel - RE: [RFC PATCH v3 1/7] dt-bindings: pinctrl: starfive: Add JH8100 pinctrl

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Date: Thu, 9 May 2024 02:24:09 +0000
From: Yuklin Soo <yuklin.soo@...rfivetech.com>
To: Conor Dooley <conor@...nel.org>
CC: Linus Walleij <linus.walleij@...aro.org>, Bartosz Golaszewski
	<bartosz.golaszewski@...aro.org>, Hal Feng <hal.feng@...rfivetech.com>,
	Leyfoon Tan <leyfoon.tan@...rfivetech.com>, Jianlong Huang
	<jianlong.huang@...rfivetech.com>, Emil Renner Berthing <kernel@...il.dk>,
	Rob Herring <robh@...nel.org>, Krzysztof Kozlowski
	<krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, Drew
 Fustini <drew@...gleboard.org>, "linux-gpio@...r.kernel.org"
	<linux-gpio@...r.kernel.org>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, "devicetree@...r.kernel.org"
	<devicetree@...r.kernel.org>, "linux-riscv@...ts.infradead.org"
	<linux-riscv@...ts.infradead.org>, Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>
Subject: RE: [RFC PATCH v3 1/7] dt-bindings: pinctrl: starfive: Add JH8100
 pinctrl



> -----Original Message-----
> From: Conor Dooley <conor@...nel.org>
> Sent: Saturday, May 4, 2024 12:07 AM
> To: Yuklin Soo <yuklin.soo@...rfivetech.com>
> Cc: Linus Walleij <linus.walleij@...aro.org>; Bartosz Golaszewski
> <bartosz.golaszewski@...aro.org>; Hal Feng <hal.feng@...rfivetech.com>;
> Leyfoon Tan <leyfoon.tan@...rfivetech.com>; Jianlong Huang
> <jianlong.huang@...rfivetech.com>; Emil Renner Berthing <kernel@...il.dk>;
> Rob Herring <robh@...nel.org>; Krzysztof Kozlowski
> <krzysztof.kozlowski+dt@...aro.org>; Conor Dooley <conor+dt@...nel.org>;
> Drew Fustini <drew@...gleboard.org>; linux-gpio@...r.kernel.org; linux-
> kernel@...r.kernel.org; devicetree@...r.kernel.org; linux-
> riscv@...ts.infradead.org; Paul Walmsley <paul.walmsley@...ive.com>; Palmer
> Dabbelt <palmer@...belt.com>; Albert Ou <aou@...s.berkeley.edu>
> Subject: Re: [RFC PATCH v3 1/7] dt-bindings: pinctrl: starfive: Add JH8100 pinctrl
> 
> On Fri, May 03, 2024 at 07:14:30PM +0800, Alex Soo wrote:
> > Add documentation and header file for JH8100 pinctrl driver.
> >
> > Signed-off-by: Alex Soo <yuklin.soo@...rfivetech.com>
> 
> > diff --git a/include/dt-bindings/pinctrl/starfive,jh8100-pinctrl.h
> > b/include/dt-bindings/pinctrl/starfive,jh8100-pinctrl.h
> > new file mode 100644
> > index 000000000000..153ba950c062
> > --- /dev/null
> > +++ b/include/dt-bindings/pinctrl/starfive,jh8100-pinctrl.h
> > @@ -0,0 +1,13 @@
> > +/* SPDX-License-Identifier: GPL-2.0 OR MIT */
> > +/*
> > + * Copyright (C) 2023-2024 StarFive Technology Co., Ltd.
> > + */
> > +
> > +#ifndef __DT_BINDINGS_PINCTRL_STARFIVE_JH8100_H__
> > +#define __DT_BINDINGS_PINCTRL_STARFIVE_JH8100_H__
> > +
> > +/* Pad Slew Rates */
> > +#define PAD_SLEW_RATE_FAST		1
> > +#define PAD_SLEW_RATE_SLOW		0
> 
> Should this really be in the bindings? I don't see it having a direct user in the
> driver.
> 
> Also, if this is the only header you have, I think the RFC tag could be dropped,
> since there'll not be a header we need to worry about getting into U-Boot etc
> with values that may change when the SoC moves from an FPGA etc to tape out.

I will drop the PAD_SLEW_RATE_* macros from dt-bindings header and move them
to the DTS header file. Will submit the next version (V4) without the "RFC PATCH"
subject prefix.

> 
> Cheers,
> Conor.