linux-kernel - Re: [PATCH v2 25/25] arm64: apple: Add initial Mac Mini 2020 (M1) devicetree

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Date:   Sun, 21 Feb 2021 16:32:34 +0100
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Hector Martin <marcan@...can.st>
Cc:     linux-arm-kernel@...ts.infradead.org,
        Marc Zyngier <maz@...nel.org>, Rob Herring <robh@...nel.org>,
        Arnd Bergmann <arnd@...nel.org>,
        Olof Johansson <olof@...om.net>,
        Mark Kettenis <mark.kettenis@...all.nl>,
        Tony Lindgren <tony@...mide.com>,
        Mohamed Mediouni <mohamed.mediouni@...amail.com>,
        Stan Skowronek <stan@...ellium.com>,
        Alexander Graf <graf@...zon.com>,
        Will Deacon <will@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Mark Rutland <mark.rutland@....com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 25/25] arm64: apple: Add initial Mac Mini 2020 (M1)
 devicetree

On Sun, Feb 21, 2021 at 11:43:52PM +0900, Hector Martin wrote:
> On 16/02/2021 04.29, Krzysztof Kozlowski wrote:
> > On Mon, Feb 15, 2021 at 09:17:13PM +0900, Hector Martin wrote:
> > > +	memory@...000000 {
> > > +		device_type = "memory";
> > > +		reg = <0 0 0 0>; /* To be filled by loader */
> > 
> > dtc and dtschema might complain, so could you set here fake memory
> > address 0x800000000? Would that work for your bootloader?
> 
> Yeah, the bootloader just replaces the entire property anyway. I'll fill in
> some dummy values (the real usable memory range is to some extent dynamic
> and depends on firmware).
> 
> > > +	};
> > > +};
> > > +
> > > +&serial0 {
> > > +	status = "okay";
> > > +};
> > > diff --git a/arch/arm64/boot/dts/apple/apple-m1.dtsi b/arch/arm64/boot/dts/apple/apple-m1.dtsi
> > > new file mode 100644
> > > index 000000000000..45c87771b057
> > > --- /dev/null
> > > +++ b/arch/arm64/boot/dts/apple/apple-m1.dtsi
> > > @@ -0,0 +1,124 @@
> > > +// SPDX-License-Identifier: GPL-2.0+ OR MIT
> > > +/*
> > > + * Copyright The Asahi Linux Contributors
> > > + */
> > > +
> > > +#include <dt-bindings/interrupt-controller/apple-aic.h>
> > > +#include <dt-bindings/interrupt-controller/irq.h>
> > > +
> > > +/ {
> > > +	compatible = "apple,m1", "apple,arm-platform";
> > > +
> > > +	#address-cells = <2>;
> > > +	#size-cells = <2>;
> > > +
> > > +	cpus {
> > > +		#address-cells = <2>;
> > > +		#size-cells = <0>;
> > > +
> > > +		cpu0: cpu@0 {
> > > +			compatible = "apple,icestorm";
> > > +			device_type = "cpu";
> > > +			reg = <0x0 0x0>;
> > > +			enable-method = "spin-table";
> > > +			cpu-release-addr = <0 0>; /* To be filled by loader */
> > > +		};
> > 
> > New line after every device node, please.
> 
> Added newlines after all the CPU nodes.
> 
> > With this minor changes, fine for me:
> > Reviewed-by: Krzysztof Kozlowski <krzk@...nel.org>
> 
> Thanks!
> 
> v3 will rename this file to apple/t8103.dtsi and the board file to
> t8103-j274.dts to better match other platforms (and to use the proper SoC ID
> for the M1); please let me know if you're okay keeping the Reviewed-by for
> that.

It's fine, keep my review tag.

Best regards,
Krzysztof