linux-kernel - Re: [PATCH 2/2] arm64: dts: imx: Add i.MX8M Plus Gateworks gw7400 dts support

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Message-ID: <be7fd7be-c65a-215c-df96-5a6eed52b5e7@linaro.org>
Date:   Fri, 8 Apr 2022 09:13:24 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Tim Harvey <tharvey@...eworks.com>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Shawn Guo <shawnguo@...nel.org>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>
Subject: Re: [PATCH 2/2] arm64: dts: imx: Add i.MX8M Plus Gateworks gw7400 dts
 support

On 07/04/2022 23:04, Tim Harvey wrote:
> The Gateworks GW7400 is an ARM based single board computer (SBC)
> featuring:
>  - i.MX8M Plus SoC
>  - LPDDR4 DRAM
>  - eMMC FLASH

Thank you for your patch. There is something to discuss/improve.

(...)

> +
> +#include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/input/linux-event-codes.h>
> +#include <dt-bindings/leds/common.h>
> +
> +#include "imx8mp.dtsi"
> +
> +/ {
> +	model = "Gateworks Venice GW74xx i.MX8MP board";
> +	compatible = "gw,imx8mp-gw74xx", "fsl,imx8mp";

Deprecated vendor prefix.

> +
> +	aliases {
> +		ethernet0 = &eqos;
> +		ethernet1 = &fec;
> +		ethernet2 = &lan1;
> +		ethernet3 = &lan2;
> +		ethernet4 = &lan3;
> +		ethernet5 = &lan4;
> +		ethernet6 = &lan5;
> +	};
> +
> +	chosen {
> +		stdout-path = &uart2;
> +	};
> +
> +	memory@...00000 {
> +		device_type = "memory";
> +		reg = <0x0 0x40000000 0 0x80000000>;
> +	};
> +
> +	gpio-keys {
> +		compatible = "gpio-keys";
> +
> +		user-pb {

Generic node names please, so "key-0" or "user-pb-key" (although adding
specific parts is really not needed, because you have the label).

> +			label = "user_pb";
> +			gpios = <&gpio 2 GPIO_ACTIVE_LOW>;
> +			linux,code = <BTN_0>;
> +		};
> +
> +		user-pb1x {
> +			label = "user_pb1x";
> +			linux,code = <BTN_1>;
> +			interrupt-parent = <&gsc>;
> +			interrupts = <0>;
> +		};
> +
> +		key-erased {
> +			label = "key_erased";
> +			linux,code = <BTN_2>;
> +			interrupt-parent = <&gsc>;
> +			interrupts = <1>;
> +		};
> +
> +		eeprom-wp {
> +			label = "eeprom_wp";
> +			linux,code = <BTN_3>;
> +			interrupt-parent = <&gsc>;
> +			interrupts = <2>;
> +		};
> +
> +		tamper {
> +			label = "tamper";
> +			linux,code = <BTN_4>;
> +			interrupt-parent = <&gsc>;
> +			interrupts = <5>;
> +		};
> +
> +		switch-hold {
> +			label = "switch_hold";
> +			linux,code = <BTN_5>;
> +			interrupt-parent = <&gsc>;
> +			interrupts = <7>;
> +		};
> +	};
> +
> +	led-controller {
> +		compatible = "gpio-leds";
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&pinctrl_gpio_leds>;
> +
> +		led-0 {
> +			function = LED_FUNCTION_STATUS;

LED_FUNCTION_HEARTBEAT

> +			color = <LED_COLOR_ID_GREEN>;
> +			gpios = <&gpio2 15 GPIO_ACTIVE_HIGH>;
> +			default-state = "on";
> +			linux,default-trigger = "heartbeat";
> +		};
> +
> +		led-1 {
> +			function = LED_FUNCTION_STATUS;
> +			color = <LED_COLOR_ID_RED>;
> +			gpios = <&gpio2 16 GPIO_ACTIVE_HIGH>;
> +			default-state = "off";
> +		};
> +	};
> +
> +	pps {
> +		compatible = "pps-gpio";
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&pinctrl_pps>;
> +		gpios = <&gpio1 12 GPIO_ACTIVE_HIGH>;
> +		status = "okay";

No need for status.

> +	};
> +

Best regards,
Krzysztof