linux-kernel - Re: [PATCH v4 4/4] arm64: dts: allwinner: h616: Add BigTreeTech Pi support

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Message-Id: <168CZR.KVQVUV8KXJ5Y1@somainline.org>
Date:   Sun, 13 Aug 2023 18:22:49 +0200
From:   Martin Botka <martin.botka@...ainline.org>
To:     Jernej Škrabec <jernej.skrabec@...il.com>
Cc:     Martin Botka <martin.botka1@...il.com>,
        Martin Botka <martin@...u3d.com>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...ainline.org>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        Jami Kettunen <jamipkettunen@...ainline.org>,
        Paul Bouchara <paul.bouchara@...ainline.org>,
        Andre Przywara <andre.przywara@....com>,
        Martin Botka <martin@...u3d.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Samuel Holland <samuel@...lland.org>,
        Ludwig Kormann <ludwig.kormann@...42.de>,
        Andrew Lunn <andrew@...n.ch>, Icenowy Zheng <uwu@...nowy.me>,
        Heiko Stuebner <heiko@...ech.de>,
        Shawn Guo <shawnguo@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Chris Morgan <macromorgan@...mail.com>,
        Jagan Teki <jagan@...eble.ai>,
        Maxime Ripard <mripard@...nel.org>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 4/4] arm64: dts: allwinner: h616: Add BigTreeTech Pi
 support



On Sun, Aug 13 2023 at 05:55:35 PM +02:00:00, Jernej Škrabec 
<jernej.skrabec@...il.com> wrote:
> Dne ponedeljek, 07. avgust 2023 ob 16:53:24 CEST je Martin Botka 
> napisal(a):
>>  The BigTreeTech Pi is an H616 based board based on CB1.
>>  Just in Rpi format board.
>> 
>>  It features the same internals as BTT CB1 but adds:
>>      - Fan port
>>      - IR receiver
>>      - ADXL345 Accelerometer connector via SPI
>>      - 24V DC power supply via terminal plugs
>>      - USB to CAN module connector (The actual USB to CAN happens on 
>> the
>>  external module)
>> 
>>  List of currently working things is same as BTT CB1 but also:
>>      - IR receiver
>>      - ADXL345 connector
>> 
>>  Signed-off-by: Martin Botka <martin@...u3d.com>
>>  Reviewed-by: Andre Przywara <andre.przywara@....com>
>>  ---
>>  Changes in V2:
>>      - Add UART alongside aliases and chosen for it
>>      - Add model string
>>      - Enable IR receiver
>>      - Enable SPI0 for ADXL345 connector
>>  Changes in V3:
>>      - Add missing semicolons
>>      - Add pinctrl for SPI0
>> 
>>   arch/arm64/boot/dts/allwinner/Makefile        |  1 +
>>   .../allwinner/sun50i-h616-bigtreetech-pi.dts  | 70 
>> +++++++++++++++++++
>>   2 files changed, 71 insertions(+)
>>   create mode 100644
>>  arch/arm64/boot/dts/allwinner/sun50i-h616-bigtreetech-pi.dts
>> 
>>  diff --git a/arch/arm64/boot/dts/allwinner/Makefile
>>  b/arch/arm64/boot/dts/allwinner/Makefile index 
>> 7b386428510b..0b6232a7f328
>>  100644
>>  --- a/arch/arm64/boot/dts/allwinner/Makefile
>>  +++ b/arch/arm64/boot/dts/allwinner/Makefile
>>  @@ -39,5 +39,6 @@ dtb-$(CONFIG_ARCH_SUNXI) += 
>> sun50i-h6-pine-h64-model-b.dtb
>>  dtb-$(CONFIG_ARCH_SUNXI) += sun50i-h6-tanix-tx6.dtb
>>   dtb-$(CONFIG_ARCH_SUNXI) += sun50i-h6-tanix-tx6-mini.dtb
>>   dtb-$(CONFIG_ARCH_SUNXI) += sun50i-h616-bigtreetech-cb1-manta.dtb
>>  +dtb-$(CONFIG_ARCH_SUNXI) += sun50i-h616-bigtreetech-pi.dtb
>>   dtb-$(CONFIG_ARCH_SUNXI) += sun50i-h616-orangepi-zero2.dtb
>>   dtb-$(CONFIG_ARCH_SUNXI) += sun50i-h616-x96-mate.dtb
>>  diff --git 
>> a/arch/arm64/boot/dts/allwinner/sun50i-h616-bigtreetech-pi.dts
>>  b/arch/arm64/boot/dts/allwinner/sun50i-h616-bigtreetech-pi.dts new 
>> file
>>  mode 100644
>>  index 000000000000..b0d0386e8f13
>>  --- /dev/null
>>  +++ b/arch/arm64/boot/dts/allwinner/sun50i-h616-bigtreetech-pi.dts
>>  @@ -0,0 +1,70 @@
>>  +// SPDX-License-Identifier: (GPL-2.0+ or MIT)
>>  +/*
>>  + * Copyright (C) 2023 Martin Botka <martin@...u3d.com>.
>>  + */
>>  +
>>  +/dts-v1/;
>>  +
>>  +#include "sun50i-h616-bigtreetech-cb1.dtsi"
>>  +
>>  +/ {
>>  +	model = "BigTreeTech Pi";
>>  +	compatible = "bigtreetech,pi", "allwinner,sun50i-h616";
>>  +
>>  +	aliases {
>>  +		serial0 = &uart0;
>>  +	};
>>  +
>>  +	chosen {
>>  +		stdout-path = "serial0:115200n8";
>>  +	};
>>  +};
>>  +
>>  +&ehci0 {
>>  +	status = "okay";
>>  +};
>>  +
>>  +&ehci1 {
>>  +	status = "okay";
>>  +};
>>  +
>>  +&ehci2 {
>>  +	status = "okay";
>>  +};
>>  +
>>  +&ehci3 {
>>  +	status = "okay";
>>  +};
>>  +
>>  +&ir {
>>  +	status = "okay";
>>  +};
>>  +
>>  +&ohci0 {
>>  +	status = "okay";
>>  +};
>>  +
>>  +&ohci1 {
>>  +	status = "okay";
>>  +};
>>  +
>>  +&ohci2 {
>>  +	status = "okay";
>>  +};
>>  +
>>  +&ohci3 {
>>  +	status = "okay";
>>  +};
>>  +
>>  +&spi0 {
>>  +	/* SPI connection for onboard connector for ADXL345 accelerometer
> */
>>  +	status = "okay";
>>  +	pinctrl-names = "default";
>>  +	pinctrl-0 = <&spi0_pins>, <&spi0_cs0_pin>;
> 
> Driver and compatible for ADXL345 already exists, why don't you add 
> child node
> for it?
> 
> Best regards,
> Jernej
Ah. So the ADXL345 actually wont be driven by kernel.
The SPI connection is enabled so that klipper (3d printer firmware) can
be told to look for ADXL345 at this SPI and use it on its own.

Klipper will initialize and communicate with the ADXL on its own.
> 
>>  +};
>>  +
>>  +&uart0 {
>>  +	pinctrl-names = "default";
>>  +	pinctrl-0 = <&uart0_ph_pins>;
>>  +	status = "okay";
>>  +};
> 
> 
> 
>