linux-kernel - Re: [PATCH v2 2/2] ARM: dts: sun8i: Add R16 Vista E board from RenewWorldOutreach

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Date:   Sun, 3 Jul 2022 02:42:25 -0500
From:   Samuel Holland <samuel@...lland.org>
To:     Suniel Mahesh <sunil@...rulasolutions.com>,
        Chen-Yu Tsai <wens@...e.org>,
        Christopher Vollo <chris@...ewoutreach.org>,
        Michael Trimarchi <michael@...rulasolutions.com>,
        Jagan Teki <jagan@...rulasolutions.com>
Cc:     Mark Brown <broonie@...nel.org>,
        Maxime Ripard <maxime.ripard@...e-electrons.com>,
        dri-devel@...ts.freedesktop.org,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
        linux-amarula@...rulasolutions.com
Subject: Re: [PATCH v2 2/2] ARM: dts: sun8i: Add R16 Vista E board from
 RenewWorldOutreach

On 6/15/22 4:39 AM, Suniel Mahesh wrote:
> The R16-Vista-E board from RenewWorldOutreach based on allwinner
> R16(A33).
> 
> General features:
> - 1GB RAM
> - microSD slot
> - Realtek Wifi
> - 1 x USB 2.0
> - HDMI IN
> - HDMI OUT
> - Audio out
> - MIPI DSI
> - TI DLPC3433
> 
> It has also connectors to connect an external mini keypad.
> 
> Signed-off-by: Christopher Vollo <chris@...ewoutreach.org>
> Signed-off-by: Jagan Teki <jagan@...rulasolutions.com>
> Signed-off-by: Suniel Mahesh <sunil@...rulasolutions.com>
> 
> ---
> Changes for v2:
> - Add missing compatible string
> - insert missing signatures of contributors
> ---
>  arch/arm/boot/dts/Makefile                    |   1 +
>  arch/arm/boot/dts/sun8i-r16-renew-vista-e.dts | 361 ++++++++++++++++++
>  2 files changed, 362 insertions(+)
>  create mode 100644 arch/arm/boot/dts/sun8i-r16-renew-vista-e.dts
> 
> diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
> index 184899808ee7..b5966c0742e1 100644
> --- a/arch/arm/boot/dts/Makefile
> +++ b/arch/arm/boot/dts/Makefile
> @@ -1353,6 +1353,7 @@ dtb-$(CONFIG_MACH_SUN8I) += \
>  	sun8i-r16-nintendo-nes-classic.dtb \
>  	sun8i-r16-nintendo-super-nes-classic.dtb \
>  	sun8i-r16-parrot.dtb \
> +	sun8i-r16-renew-vista-e.dtb \
>  	sun8i-r40-bananapi-m2-ultra.dtb \
>  	sun8i-r40-oka40i-c.dtb \
>  	sun8i-s3-elimo-initium.dtb \
> diff --git a/arch/arm/boot/dts/sun8i-r16-renew-vista-e.dts b/arch/arm/boot/dts/sun8i-r16-renew-vista-e.dts
> new file mode 100644
> index 000000000000..45f620203c33
> --- /dev/null
> +++ b/arch/arm/boot/dts/sun8i-r16-renew-vista-e.dts
> @@ -0,0 +1,361 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright (C) 2022 RenewWorldOutreach
> + * Copyright (C) 2022 Amarula Solutions(India)
> + */
> +
> +/dts-v1/;
> +#include "sun8i-a33.dtsi"
> +
> +#include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/input/input.h>
> +#include <dt-bindings/leds/common.h>
> +
> +/ {
> +	model = "RenewWorldOutreach R16-Vista-E";
> +	compatible = "renewworldoutreach,r16-vista-e", "allwinner,sun8i-r16", "allwinner,sun8i-a33";
> +
> +	aliases {
> +		serial0 = &uart0;
> +	};
> +
> +	chosen {
> +		stdout-path = "serial0:115200n8";
> +	};
> +
> +	gpio-keys-polled {
> +		compatible = "gpio-keys-polled";
> +		poll-interval = <100>;
> +
> +		ok {
> +			label = "ok";
> +			linux,code = <KEY_OK>;
> +			gpios = <&pio 4 0 GPIO_ACTIVE_LOW>;
> +		};
> +
> +		left {
> +			label = "left";
> +			linux,code = <KEY_LEFT>;
> +			gpios = <&pio 4 1 GPIO_ACTIVE_LOW>;
> +		};
> +
> +		right {
> +			label = "right";
> +			linux,code = <KEY_RIGHT>;
> +			gpios = <&pio 4 2 GPIO_ACTIVE_LOW>;
> +		};
> +
> +		up {
> +			label = "up";
> +			linux,code = <KEY_UP>;
> +			gpios = <&pio 4 3 GPIO_ACTIVE_LOW>;
> +		};
> +
> +		down {
> +			label = "down";
> +			linux,code = <KEY_DOWN>;
> +			gpios = <&pio 4 4 GPIO_ACTIVE_LOW>;
> +		};
> +
> +		back {
> +			label = "back";
> +			linux,code = <KEY_BACK>;
> +			gpios = <&pio 4 5 GPIO_ACTIVE_LOW>;
> +		};
> +
> +		power {
> +			label = "power";
> +			linux,code = <KEY_POWER>;
> +			gpios = <&pio 4 6 GPIO_ACTIVE_LOW>;
> +		};
> +
> +		vol-down {
> +			label = "vol-down";
> +			linux,code = <KEY_VOLUMEDOWN>;
> +			gpios = <&pio 7 3 GPIO_ACTIVE_LOW>;
> +		};
> +
> +		vol-up {
> +			label = "vol-up";
> +			linux,code = <KEY_VOLUMEUP>;
> +			gpios = <&pio 7 9 GPIO_ACTIVE_LOW>;
> +		};
> +	};
> +
> +	leds {
> +		compatible = "gpio-leds";
> +
> +		battery-led0 {
> +			label = "renew-e:battery-led0";
> +			gpios = <&r_pio 0 2 GPIO_ACTIVE_HIGH>;
> +		};
> +
> +		battery-led1 {
> +			label = "renew-e:battery-led1";
> +			gpios = <&r_pio 0 3 GPIO_ACTIVE_HIGH>;
> +		};
> +
> +		battery-led2 {
> +			label = "renew-e:battery-led2";
> +			gpios = <&r_pio 0 4 GPIO_ACTIVE_HIGH>;
> +		};
> +
> +		battery-led3 {
> +			label = "renew-e:battery-led3";
> +			gpios = <&r_pio 0 5 GPIO_ACTIVE_HIGH>;
> +		};
> +
> +		pad-intz {
> +			label = "renew-e:pad-intz";
> +			gpios = <&pio 4 16 GPIO_ACTIVE_HIGH>;
> +			default-state = "on";
> +		};

Is this really an LED, or just a generic output?

> +
> +		battery-led4 {
> +			label = "renew-e:battery-led4";
> +			gpios = <&r_pio 0 6 GPIO_ACTIVE_HIGH>;
> +		};
> +
> +		volume-led0 {
> +                        label = "renew-e:volume-led0";
> +                        gpios = <&pio 7 2 GPIO_ACTIVE_HIGH>;
> +                };

Indent with tabs, please.

> +
> +		volume-led1 {
> +			label = "renew-e:volume-led1";
> +			gpios = <&pio 6 13 GPIO_ACTIVE_HIGH>;
> +		};
> +
> +		volume-led2 {
> +			label = "renew-e:volume-led2";
> +			gpios = <&pio 6 12 GPIO_ACTIVE_HIGH>;
> +		};
> +
> +		volume-led3 {
> +			label = "renew-e:volume-led3";
> +			gpios = <&pio 6 11 GPIO_ACTIVE_HIGH>;
> +		};
> +
> +		volume-led4 {
> +			label = "renew-e:volume-led4";
> +			gpios = <&pio 6 10 GPIO_ACTIVE_HIGH>;
> +		};
> +
> +		fans-on {
> +			label = "renew-e:fans-on";
> +			gpios = <&pio 4 14 GPIO_ACTIVE_HIGH>; /* FAN_ON/OFF: PE14 */
> +			default-state = "on";
> +		};

Does this drive an LED or control a fan? If it controls a fan, it should use the
gpio-fan binding, and not pretend to be an LED.

It also does not validate against the gpio-leds binding:

sun8i-r16-renew-vista-e.dtb: leds: 'fans-on', 'pad-intz' do not match any of the
regexes: '(^led-[0-9a-f]$|led)', 'pinctrl-[0-9]+'

> +	};
> +
> +	reg_vcc5v0: vcc5v0 {
> +		compatible = "regulator-fixed";
> +		regulator-name = "vcc5v0";
> +		regulator-min-microvolt = <5000000>;
> +		regulator-max-microvolt = <5000000>;
> +	};
> +};
> +
> +&codec {
> +	status = "okay";
> +};
> +
> +&cpu0 {
> +	cpu-supply = <&reg_dcdc3>;
> +};
> +
> +&cpu0_opp_table {
> +	opp-1104000000 {
> +		opp-hz = /bits/ 64 <1104000000>;
> +		opp-microvolt = <1320000>;
> +		clock-latency-ns = <244144>; /* 8 32k periods */
> +	};
> +
> +	opp-1200000000 {
> +		opp-hz = /bits/ 64 <1200000000>;
> +		opp-microvolt = <1320000>;
> +		clock-latency-ns = <244144>; /* 8 32k periods */
> +	};
> +};
> +
> +&dai {
> +	status = "okay";
> +};
> +
> +&de {
> +	status = "okay";
> +};
> +
> +&dphy {
> +	status = "okay";
> +};
> +
> +&ehci0 {
> +	status = "okay";
> +};
> +
> +&mmc0 {
> +	vmmc-supply = <&reg_dcdc1>;
> +	bus-width = <4>;
> +	non-removable;
> +	status = "okay";
> +};
> +
> +&mmc1 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&mmc1_pg_pins>;
> +	vmmc-supply = <&reg_dcdc1>;
> +	bus-width = <4>;
> +	broken-cd;
> +	status = "okay";
> +};
> +
> +&ohci0 {
> +	status = "okay";
> +};
> +
> +&r_rsb {
> +	status = "okay";
> +
> +	axp22x: pmic@3a3 {
> +		compatible = "x-powers,axp223";
> +		reg = <0x3a3>;
> +		interrupt-parent = <&r_intc>;
> +		interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_LOW>;
> +		eldoin-supply = <&reg_dcdc1>;
> +		x-powers,drive-vbus-en;
> +	};
> +};
> +
> +#include "axp223.dtsi"
> +
> +&ac_power_supply {
> +	status = "okay";
> +};
> +
> +&reg_aldo1 {
> +	regulator-always-on;
> +	regulator-min-microvolt = <3000000>;
> +	regulator-max-microvolt = <3000000>;
> +	regulator-name = "vcc-io";
> +};
> +
> +&reg_aldo2 {
> +	regulator-always-on;
> +	regulator-min-microvolt = <2500000>;
> +	regulator-max-microvolt = <2500000>;
> +	regulator-name = "vdd-dll";
> +};
> +
> +&reg_aldo3 {
> +	regulator-always-on;
> +	regulator-min-microvolt = <3000000>;
> +	regulator-max-microvolt = <3000000>;
> +	regulator-name = "avcc";
> +};
> +
> +&reg_dc1sw {
> +	regulator-name = "vcc-lcd";
> +};
> +
> +&reg_dc5ldo {
> +	regulator-always-on;
> +	regulator-min-microvolt = <900000>;
> +	regulator-max-microvolt = <1400000>;
> +	regulator-name = "vdd-cpus";
> +};
> +
> +&reg_dcdc1 {
> +	regulator-always-on;
> +	regulator-min-microvolt = <3000000>;
> +	regulator-max-microvolt = <3000000>;
> +	regulator-name = "vcc-3v0";
> +};
> +
> +&reg_dcdc2 {
> +	regulator-always-on;
> +	regulator-min-microvolt = <900000>;
> +	regulator-max-microvolt = <1400000>;
> +	regulator-name = "vdd-sys";
> +};
> +
> +&reg_dcdc3 {
> +	regulator-always-on;
> +	regulator-min-microvolt = <900000>;
> +	regulator-max-microvolt = <1400000>;
> +	regulator-name = "vdd-cpu";
> +};
> +
> +&reg_dcdc5 {
> +	regulator-always-on;
> +	regulator-min-microvolt = <1500000>;
> +	regulator-max-microvolt = <1500000>;
> +	regulator-name = "vcc-dram";
> +};
> +
> +&reg_dldo1 {
> +	regulator-always-on;
> +	regulator-min-microvolt = <3300000>;
> +	regulator-max-microvolt = <3300000>;
> +	regulator-name = "vcc-3v3-main1";
> +};
> +
> +&reg_dldo2 {
> +	regulator-always-on;
> +	regulator-min-microvolt = <3300000>;
> +	regulator-max-microvolt = <3300000>;
> +	regulator-name = "vcc-3v3-main2";
> +};
> +
> +&reg_dldo3 {
> +	regulator-always-on;
> +	regulator-min-microvolt = <3300000>;
> +	regulator-max-microvolt = <3300000>;
> +	regulator-name = "vcc-3v3-main3";
> +};
> +
> +&reg_dldo4 {
> +	regulator-always-on;
> +	regulator-min-microvolt = <3300000>;
> +	regulator-max-microvolt = <3300000>;
> +	regulator-name = "vcc-3v3-main4";
> +};
> +
> +&reg_eldo1 {
> +	regulator-always-on;
> +	regulator-min-microvolt = <1200000>;
> +	regulator-max-microvolt = <1200000>;
> +	regulator-name = "vcc-1v2-hdmi";
> +};
> +
> +&reg_drivevbus {
> +	regulator-name = "usb0-vbus";
> +	status = "okay";
> +};
> +
> +&reg_rtc_ldo {
> +	regulator-name = "vcc-rtc";
> +};
> +
> +&sound {
> +	status = "okay";
> +	simple-audio-card,routing =
> +		"Left DAC", "AIF1 Slot 0 Left",
> +		"Right DAC", "AIF1 Slot 0 Right";

Please use "DACL" and "DACR" here, instead of the AIF1 Slot 0 widgets. The AIF1
Slot 0 widgets do not accurately describe the audio routing and are only kept
for backward compatibility.

> +};
> +
> +&uart0 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&uart0_pb_pins>;
> +	status = "okay";
> +};
> +
> +&usb_otg {
> +	dr_mode = "host";
> +	status = "okay";
> +};
> +
> +&usbphy {
> +	usb0_vbus-supply = <&reg_vcc5v0>;

You enable drivevbus and label it as "usb0-vbus". But this suggests the VBUS is
always on. Which is correct?

> +	status = "okay";
> +};
>