linux-kernel - Re: [PATCH 1/2] arm64: dts: Add dts files for Marvell Berlin4CT SoC

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Message-ID: <20150721143426.GC10595@leverpostej>
Date:	Tue, 21 Jul 2015 15:34:26 +0100
From:	Mark Rutland <mark.rutland@....com>
To:	Jisheng Zhang <jszhang@...vell.com>
Cc:	Catalin Marinas <Catalin.Marinas@....com>,
	Will Deacon <Will.Deacon@....com>,
	"khilman@...aro.org" <khilman@...aro.org>,
	"arnd@...db.de" <arnd@...db.de>, "olof@...om.net" <olof@...om.net>,
	"robh+dt@...nel.org" <robh+dt@...nel.org>,
	"galak@...eaurora.org" <galak@...eaurora.org>,
	Pawel Moll <Pawel.Moll@....com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	marc.zyngier@....com
Subject: Re: [PATCH 1/2] arm64: dts: Add dts files for Marvell Berlin4CT SoC

Hi,

> +/dts-v1/;
> +
> +/memreserve/ 0x00000000 0x01000000;

What's this reservation for?

Given you're using PSCI I can't see why we'd expect the kernel to map
but not use some memory.

> +
> +#include "berlin4ct.dtsi"
> +
> +/ {
> +	model = "MARVELL BG4CT DMP BOARD";
> +	compatible = "marvell,berlin4ct-dmp", "marvell,berlin4ct", "marvell,berlin";
> +
> +	chosen {
> +		bootargs = "earlyprintk";
> +		stdout-path = "serial0:115200n8";
> +	};

You shouldn't need those bootargs; "earlyprintk" does nothing on arm64.

[...]

> +		gic: interrupt-controller@...000 {
> +			compatible = "arm,gic-400";
> +			#interrupt-cells = <3>;
> +			interrupt-controller;
> +			reg = <0x901000 0x1000>,
> +			      <0x902000 0x1000>,
> +			      <0x904000 0x2000>,
> +			      <0x906000 0x2000>;
> +			interrupts = <GIC_PPI 9 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>;
> +		};
> +

I believe the size of the cpu interface (the second reg entry) should be
0x2000, as GICC_DIR is at offset 0x1000.

Otherwise this looks fine.

Thanks,
Mark.
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