[PATCH 3/7] riscv: dts: eswin: eic7700: add pinctrl support

[Conor Dooley]

On Mon, Jun 15, 2026 at 05:50:12PM +0530, Pinkesh Vaghela wrote:
> From: Yulin Lu <luyulin at eswincomputing.com>
> 
> Add pinctrl node and related pin configuration for EIC7700 SoC
> 
> Co-developed-by: Pritesh Patel <pritesh.patel at einfochips.com>
> Signed-off-by: Pritesh Patel <pritesh.patel at einfochips.com>
> Signed-off-by: Yulin Lu <luyulin at eswincomputing.com>
> Signed-off-by: Pinkesh Vaghela <pinkesh.vaghela at einfochips.com>
> ---
>  .../dts/eswin/eic7700-hifive-premier-p550.dts | 109 +++
>  .../riscv/boot/dts/eswin/eic7700-pinctrl.dtsi | 888 ++++++++++++++++++
>  arch/riscv/boot/dts/eswin/eic7700.dtsi        |   5 +
>  3 files changed, 1002 insertions(+)
>  create mode 100644 arch/riscv/boot/dts/eswin/eic7700-pinctrl.dtsi
> 
> diff --git a/arch/riscv/boot/dts/eswin/eic7700-hifive-premier-p550.dts b/arch/riscv/boot/dts/eswin/eic7700-hifive-premier-p550.dts
> index 1fb92f0e7c55..e7bb96e14958 100644
> --- a/arch/riscv/boot/dts/eswin/eic7700-hifive-premier-p550.dts
> +++ b/arch/riscv/boot/dts/eswin/eic7700-hifive-premier-p550.dts
> @@ -6,6 +6,7 @@
>  /dts-v1/;
>  
>  #include "eic7700.dtsi"
> +#include "eic7700-pinctrl.dtsi"
>  
>  / {
>  	compatible = "sifive,hifive-premier-p550", "eswin,eic7700";
> @@ -18,6 +19,15 @@ aliases {
>  	chosen {
>  		stdout-path = "serial0:115200n8";
>  	};
> +
> +	vcc_1v8: vcc1v8 {

Same here.

> +		 compatible = "regulator-fixed";
> +		 regulator-name = "vcc1v8";
> +		 regulator-always-on;
> +		 regulator-boot-on;
> +		 regulator-min-microvolt = <1800000>;
> +		 regulator-max-microvolt = <1800000>;
> +	 };
>  };
>  
>  &xtal {
> @@ -25,6 +35,105 @@ &xtal {
>  	clock-output-names = "xtal24m";
>  };
>  
> +&gpio0_pins {
> +	bias-disable;
> +	input-enable;
> +};
> +
> +&gpio5_pins {
> +	bias-disable;
> +	input-enable;
> +};
> +
> +&gpio11_pins {
> +	bias-disable;
> +	input-enable;
> +};
> +
> +&gpio14_pins {
> +	bias-pull-up;
> +	input-disable;
> +};
> +
> +&gpio15_pins {
> +	bias-disable;
> +	input-enable;
> +};
> +
> +&gpio28_pins {
> +	bias-disable;
> +	input-enable;
> +};
> +
> +&gpio43_pins {
> +	bias-disable;
> +	input-disable;
> +};
> +
> +&gpio71_pins {
> +	bias-pull-up;
> +	input-disable;
> +};
> +
> +&gpio74_pins {
> +	bias-pull-up;
> +	input-disable;
> +};
> +
> +&gpio76_pins {
> +	bias-disable;
> +	input-disable;
> +};
> +
> +&gpio77_pins {
> +	bias-pull-up;
> +	input-disable;
> +};
> +
> +&gpio79_pins {
> +	bias-disable;
> +	input-disable;
> +};
> +
> +&gpio80_pins {
> +	bias-pull-up;
> +	input-disable;
> +};
> +
> +&gpio82_pins {
> +	bias-pull-up;
> +	input-disable;
> +};
> +
> +&gpio84_pins {
> +	bias-disable;
> +	input-disable;
> +};
> +
> +&gpio85_pins {
> +	bias-pull-up;
> +	input-disable;
> +};
> +
> +&gpio94_pins {
> +	bias-disable;
> +	input-disable;
> +};
> +
> +&gpio106_pins {
> +	bias-disable;
> +	input-disable;
> +};
> +
> +&gpio111_pins {
> +	bias-disable;
> +	input-disable;
> +};
> +
> +&pinctrl {
> +	vrgmii-supply = <&vcc_1v8>;
> +};
> +
>  &uart0 {
>  	status = "okay";
>  };
> diff --git a/arch/riscv/boot/dts/eswin/eic7700-pinctrl.dtsi b/arch/riscv/boot/dts/eswin/eic7700-pinctrl.dtsi
> new file mode 100644
> index 000000000000..7293df146aa7
> --- /dev/null
> +++ b/arch/riscv/boot/dts/eswin/eic7700-pinctrl.dtsi
> @@ -0,0 +1,888 @@
> +// SPDX-License-Identifier: (GPL-2.0 OR MIT)
> +/*
> + * Copyright (c) 2025 Beijing ESWIN Computing Technology Co., Ltd.
> + *
> + * ESWIN's EIC7700 SoC pin-mux and pin-config options are listed as
> + * device tree nodes in this file.
> + *
> + * Authors: Yulin Lu <luyulin at eswincomputing.com>
> + */
> +

I don't really understand the groups here. I think you should make more
effort to put more pins in each group.

> +		gpio1_pins: gpio1-pins {
> +			pins = "jtag0_tck";
> +			function = "gpio";
> +		};
> +
> +		gpio2_pins: gpio2-pins {
> +			pins = "jtag0_tms";
> +			function = "gpio";
> +		};
> +
> +		gpio3_pins: gpio3-pins {
> +			pins = "jtag0_tdi";
> +			function = "gpio";
> +		};
> +
> +		gpio4_pins: gpio4-pins {
> +			pins = "jtag0_tdo";
> +			function = "gpio";
> +		};

Like these 4 for example, why not group these?
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