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

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Date:   Tue, 14 Nov 2023 10:07:31 +0800
From:   Chen Wang <unicorn_wang@...look.com>
To:     Jisheng Zhang <jszhang@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        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>
Cc:     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 2023/11/13 8:57, 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 */
> +/*
> + * 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
> +
> +#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>

Another question:

Does this patch depend on anther patchset "riscv: sophgo: add reset 
support for cv1800b"?

If so, you may need to add comments in the cover-letter to clarify this. 
But I'm afraid it does not.


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