linux-kernel - Re: [PATCH 1/2] riscv: dts: cv1800b: add pinctrl node for cv1800b

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Message-ID: <20231116163602.GA2440245-robh@kernel.org>
Date:   Thu, 16 Nov 2023 10:36:02 -0600
From:   Rob Herring <robh@...nel.org>
To:     Jisheng Zhang <jszhang@...nel.org>
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Chao Wei <chao.wei@...hgo.com>,
        Chen Wang <unicorn_wang@...look.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-riscv@...ts.infradead.org
Subject: Re: [PATCH 1/2] riscv: dts: cv1800b: add pinctrl node for cv1800b

On Mon, Nov 13, 2023 at 08:57:01AM +0800, Jisheng Zhang wrote:
> Add the reset device tree node to cv1800b SoC reusing the
> pinctrl-single driver.
> 
> Signed-off-by: Jisheng Zhang <jszhang@...nel.org>
> ---
>  arch/riscv/boot/dts/sophgo/cv-pinctrl.h | 19 +++++++++++++++++++
>  arch/riscv/boot/dts/sophgo/cv1800b.dtsi | 10 ++++++++++
>  2 files changed, 29 insertions(+)
>  create mode 100644 arch/riscv/boot/dts/sophgo/cv-pinctrl.h
> 
> diff --git a/arch/riscv/boot/dts/sophgo/cv-pinctrl.h b/arch/riscv/boot/dts/sophgo/cv-pinctrl.h
> new file mode 100644
> index 000000000000..ed78b6fb3142
> --- /dev/null
> +++ b/arch/riscv/boot/dts/sophgo/cv-pinctrl.h
> @@ -0,0 +1,19 @@
> +/* SPDX-License-Identifier: GPL-2.0 */

Please match the licensing of the file(s) that include this. Not that 
there really anything 

> +/*
> + * This header provides constants for pinctrl bindings for Sophgo CV* SoC.
> + *
> + * Copyright (C) 2023 Jisheng Zhang <jszhang@...nel.org>
> + */
> +#ifndef _DTS_RISCV_SOPHGO_CV_PINCTRL_H
> +#define _DTS_RISCV_SOPHGO_CV_PINCTRL_H
> +
> +#define MUX_M0		0
> +#define MUX_M1		1
> +#define MUX_M2		2
> +#define MUX_M3		3
> +#define MUX_M4		4
> +#define MUX_M5		5
> +#define MUX_M6		6
> +#define MUX_M7		7

I find defines with the number in the name to be somewhat pointless.

> +
> +#endif
> diff --git a/arch/riscv/boot/dts/sophgo/cv1800b.dtsi b/arch/riscv/boot/dts/sophgo/cv1800b.dtsi
> index e04df04a91c0..7a44d8e8672b 100644
> --- a/arch/riscv/boot/dts/sophgo/cv1800b.dtsi
> +++ b/arch/riscv/boot/dts/sophgo/cv1800b.dtsi
> @@ -6,6 +6,8 @@
>  #include <dt-bindings/interrupt-controller/irq.h>
>  #include <dt-bindings/reset/sophgo,cv1800b-reset.h>
>  
> +#include "cv-pinctrl.h"
> +
>  / {
>  	compatible = "sophgo,cv1800b";
>  	#address-cells = <1>;
> @@ -55,6 +57,14 @@ soc {
>  		dma-noncoherent;
>  		ranges;
>  
> +		pinctrl0: pinctrl@...1000 {
> +			compatible = "pinctrl-single";
> +			reg = <0x3001000 0x130>;
> +			#pinctrl-cells = <1>;
> +			pinctrl-single,register-width = <32>;
> +			pinctrl-single,function-mask = <0x00000007>;
> +		};

Even more pointless is the defines are not even used.

> +
>  		rst: reset-controller@...3000 {
>  			compatible = "sophgo,cv1800b-reset";
>  			reg = <0x03003000 0x1000>;
> -- 
> 2.42.0
>