linux-kernel - Re: [RFC PATCH 3/4] riscv: dts: Add EIC7700 pin controller node

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Message-ID: <a20d5849-770e-420d-b707-83a50c37810b@sifive.com>
Date: Tue, 25 Mar 2025 16:49:14 -0500
From: Samuel Holland <samuel.holland@...ive.com>
To: Emil Renner Berthing <emil.renner.berthing@...onical.com>,
 Pinkesh Vaghela <pinkesh.vaghela@...fochips.com>,
 Pritesh Patel <pritesh.patel@...fochips.com>,
 Min Lin <linmin@...incomputing.com>
Cc: Linus Walleij <linus.walleij@...aro.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Paul Walmsley <paul.walmsley@...ive.com>,
 Palmer Dabbelt <palmer@...belt.com>, Alexandre Ghiti <alex@...ti.fr>,
 Bartosz Golaszewski <brgl@...ev.pl>, linux-gpio@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-riscv@...ts.infradead.org, 鲁玉林
 <luyulin@...incomputing.com>, 宁宇
 <ningyu@...incomputing.com>, Lin Feng <fenglin@...incomputing.com>
Subject: Re: [RFC PATCH 3/4] riscv: dts: Add EIC7700 pin controller node

On 2025-03-25 9:13 AM, Emil Renner Berthing wrote:
> Add node for the pin controller on the ESWIN EIC7700 SoC and gpio-ranges
> properties mapping GPIOs to pins.
> 
> Signed-off-by: Emil Renner Berthing <emil.renner.berthing@...onical.com>
> ---
>  arch/riscv/boot/dts/eswin/eic7700.dtsi | 17 +++++++++++++++++
>  1 file changed, 17 insertions(+)
> 
> diff --git a/arch/riscv/boot/dts/eswin/eic7700.dtsi b/arch/riscv/boot/dts/eswin/eic7700.dtsi
> index 9cef940f07e4..7226647919b7 100644
> --- a/arch/riscv/boot/dts/eswin/eic7700.dtsi
> +++ b/arch/riscv/boot/dts/eswin/eic7700.dtsi
> @@ -312,6 +312,13 @@ porta: gpio-port@0 {
>  					<324>, <325>, <326>, <327>, <328>, <329>, <330>,
>  					<331>, <332>, <333>, <334>;
>  				gpio-controller;
> +				gpio-ranges = <&pinctrl  0 12  1>,
> +					      <&pinctrl  1 14 12>,
> +					      <&pinctrl 13  1  4>,
> +					      <&pinctrl 17 32  1>,
> +					      <&pinctrl 18 40  5>,
> +					      <&pinctrl 23 51  7>,
> +					      <&pinctrl 30 68  2>;
>  				ngpios = <32>;
>  				#gpio-cells = <2>;
>  			};
> @@ -320,6 +327,9 @@ portb: gpio-port@1 {
>  				compatible = "snps,dw-apb-gpio-port";
>  				reg = <1>;
>  				gpio-controller;
> +				gpio-ranges = <&pinctrl  0 70  3>,
> +					      <&pinctrl  3 79  7>,
> +					      <&pinctrl 10 89 22>;
>  				ngpios = <32>;
>  				#gpio-cells = <2>;
>  			};
> @@ -328,6 +338,7 @@ portc: gpio-port@2 {
>  				compatible = "snps,dw-apb-gpio-port";
>  				reg = <2>;
>  				gpio-controller;
> +				gpio-ranges = <&pinctrl 0 111 32>;
>  				ngpios = <32>;
>  				#gpio-cells = <2>;
>  			};
> @@ -336,9 +347,15 @@ portd: gpio-port@3 {
>  				compatible = "snps,dw-apb-gpio-port";
>  				reg = <3>;
>  				gpio-controller;
> +				gpio-ranges = <&pinctrl 0 143 16>;
>  				ngpios = <16>;
>  				#gpio-cells = <2>;
>  			};
>  		};
> +
> +		pinctrl: pinctrl@...00080 {
> +			compatible = "eswin,eic7700-pinctrl";
> +			reg = <0x0 0x51600080 0x0 0xff80>;

Per the TRM, the MMIO range is 2M-128B large, so the size should be 0x1fff80.
Other than that, the rest looks good (especially, the GPIO ranges match what I
have), so:

Reviewed-by: Samuel Holland <samuel.holland@...ive.com>

> +		};
>  	};
>  };