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Date:   Thu, 02 Nov 2017 19:59:04 +0100
From:   Frank Kunz <mailinglists@...z-im-inter.net>
To:     Maxime Ripard <maxime.ripard@...e-electrons.com>
Cc:     devicetree@...r.kernel.org, mark.rutland@....com, wens@...e.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        robh+dt@...nel.org
Subject: Re: [PATCH] ARM: sun7i: Add Cubietech Einstein A20 board device-tree

Am Donnerstag, 2. November 2017, 16:57:36 CET schrieb Maxime Ripard:
> Hi Frank,
> 
> Thanks for your patch.
> 
> On Thu, Nov 02, 2017 at 03:35:34PM +0100, Frank Kunz wrote:
> > From: Frank Kunz <xxxxxmichl@...glemail.com>
> > 
> > The Einstein A20 board is a Allwinner A20 based board with a credit card
> > form factor.
> > 
> > Features:
> > - Allwinner A20 SoC
> > - DDR3 1GB RAM
> > - 8GiB eMMC
> > - AP6210 wifi/Bluetooth
> > - RTC
> > - Micro USB-OTG connector
> > - UART0 debugging port
> > - 200 pins stamp hole package
> > 
> > Signed-off-by: Frank Kunz <xxxxxmichl@...glemail.com>
> > ---
> > 
> >  arch/arm/boot/dts/Makefile               |   1 +
> >  arch/arm/boot/dts/sun7i-a20-einstein.dts | 200
> >  +++++++++++++++++++++++++++++++ 2 files changed, 201 insertions(+)
> >  create mode 100644 arch/arm/boot/dts/sun7i-a20-einstein.dts
> > 
> > diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
> > index faf46abaa4a2..f9158400ea0f 100644
> > --- a/arch/arm/boot/dts/Makefile
> > +++ b/arch/arm/boot/dts/Makefile
> > @@ -878,6 +878,7 @@ dtb-$(CONFIG_MACH_SUN7I) += \
> > 
> >  	sun7i-a20-bananapro.dtb \
> >  	sun7i-a20-cubieboard2.dtb \
> >  	sun7i-a20-cubietruck.dtb \
> > 
> > +	sun7i-a20-einstein.dtb \
> 
> I guess it's not that obvious from what company that board is coming
> from. Could you turn it into cubietech-einstein please?

No problem, I will rename it.

> 
> >  	sun7i-a20-hummingbird.dtb \
> >  	sun7i-a20-itead-ibox.dtb \
> >  	sun7i-a20-i12-tvbox.dtb \
> > 
> > diff --git a/arch/arm/boot/dts/sun7i-a20-einstein.dts
> > b/arch/arm/boot/dts/sun7i-a20-einstein.dts new file mode 100644
> > index 000000000000..59d46b08f21c
> > --- /dev/null
> > +++ b/arch/arm/boot/dts/sun7i-a20-einstein.dts
> > @@ -0,0 +1,200 @@
> > +/*
> > + * Copyright 2017 Frank Kunz
> > + *
> > + * Frank Kunz <xxxxxmichl@...glemail.com>
> > + *
> > + * This file is dual-licensed: you can use it either under the terms
> > + * of the GPL or the X11 license, at your option. Note that this dual
> > + * licensing only applies to this file, and not this project as a
> > + * whole.
> > + *
> > + *  a) This file is free software; you can redistribute it and/or
> > + *     modify it under the terms of the GNU General Public License as
> > + *     published by the Free Software Foundation; either version 2 of the
> > + *     License, or (at your option) any later version.
> > + *
> > + *     This file is distributed in the hope that it will be useful,
> > + *     but WITHOUT ANY WARRANTY; without even the implied warranty of
> > + *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> > + *     GNU General Public License for more details.
> > + *
> > + * Or, alternatively,
> > + *
> > + *  b) Permission is hereby granted, free of charge, to any person
> > + *     obtaining a copy of this software and associated documentation
> > + *     files (the "Software"), to deal in the Software without
> > + *     restriction, including without limitation the rights to use,
> > + *     copy, modify, merge, publish, distribute, sublicense, and/or
> > + *     sell copies of the Software, and to permit persons to whom the
> > + *     Software is furnished to do so, subject to the following
> > + *     conditions:
> > + *
> > + *     The above copyright notice and this permission notice shall be
> > + *     included in all copies or substantial portions of the Software.
> > + *
> > + *     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
> > + *     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
> > + *     OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
> > + *     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
> > + *     HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
> > + *     WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
> > + *     FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
> > + *     OTHER DEALINGS IN THE SOFTWARE.
> > + */
> > +
> > +/dts-v1/;
> > +#include "sun7i-a20.dtsi"
> > +#include "sunxi-common-regulators.dtsi"
> > +
> > +#include <dt-bindings/gpio/gpio.h>
> > +#include <dt-bindings/interrupt-controller/irq.h>
> > +
> > +/ {
> > +	model = "Cubietech Einstein A20";
> > +	compatible = "cubietech,einstein-a20", "allwinner,sun7i-a20";
> > +
> > +	aliases {
> > +		serial0 = &uart0;
> > +	};
> > +
> > +	chosen {
> > +		stdout-path = "serial0:115200n8";
> > +	};
> > +
> > +	mmc3_pwrseq: mmc3_pwrseq {
> > +		compatible = "mmc-pwrseq-simple";
> > +		pinctrl-names = "default";
> > +		pinctrl-0 = <&mmc3_pwrseq_pin_ea20>;
> 
> You don't need those GPIO pinctrl nodes, you can remove all of them.

Fixed.

> 
> > +		reset-gpios = <&pio 7 9 GPIO_ACTIVE_LOW>; /* PH9 WIFI-SHDN */
> > +	};
> > +};
> > +
> > +&cpu0 {
> > +	cpu-supply = <&reg_dcdc2>;
> > +};
> > +
> > +&ehci0 {
> > +	status = "okay";
> > +};
> > +
> > +&i2c0 {
> > +	pinctrl-names = "default";
> > +	pinctrl-0 = <&i2c0_pins_a>;
> > +	status = "okay";
> > +
> > +	axp209: pmic@34 {
> > +		reg = <0x34>;
> > +		interrupt-parent = <&nmi_intc>;
> > +		interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
> > +	};
> > +};
> > +
> > +&mmc2 {
> > +	pinctrl-names = "default";
> > +	pinctrl-0 = <&mmc2_pins_a>;
> > +	vmmc-supply = <&reg_vcc3v3>;
> 
> What regulator is this connected to on the PMIC?

Fixed, On the schematic it is finally connected to 3v0.

> 
> > +	bus-width = <4>;
> > +	non-removable;
> > +	status = "okay";
> > +};
> > +
> > +&mmc3 {
> > +	#address-cells = <1>;
> > +	#size-cells = <0>;
> > +	pinctrl-names = "default";
> > +	pinctrl-0 = <&mmc3_pins_a>;
> > +	vmmc-supply = <&reg_vcc3v3>;
> 
> Same question here.

Same fix here, connected on schematic to 3v0.

> 
> Looks good otherwise, thanks!
> Maxime

Thanks for your feedback, new patch is on the way.

Br,
Frank

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