linux-kernel - Re: [PATCH 11/11] ARM64: dts: Prepare Actions Semi S900 and Bubblegum-96

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Date:   Wed, 15 Feb 2017 17:12:32 +0000
From:   Mark Rutland <mark.rutland@....com>
To:     Andreas Färber <afaerber@...e.de>
CC:     <linux-arm-kernel@...ts.infradead.org>, <contact@...ux-xapple.org>,
        <mp-cs@...ions-semi.com>, <info@...obotics.com>,
        <support@...aker.org>, <linux-kernel@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        <devicetree@...r.kernel.org>, <nd@....com>
Subject: Re: [PATCH 11/11] ARM64: dts: Prepare Actions Semi S900 and
 Bubblegum-96

Hi,

On Wed, Feb 15, 2017 at 05:55:28PM +0100, Andreas Färber wrote:
> +#include "s900.dtsi"
> +
> +/ {
> +	compatible = "ucrobotics,bubblegum-96", "acts,s900";
> +	model = "Bubblegum-96";
> +
> +	aliases {
> +		serial5 = &uart5;
> +	};
> +
> +	chosen {
> +		stdout-path = "serial5:115200n8";
> +	};
> +};

I didn't spot a memory node here or in the dtsi. Does the FW/bootloader
create one?

> +	reserved-memory {
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		ranges;
> +	};

Why have this empty node?

> +
> +	psci {
> +		compatible = "arm,psci-0.2";
> +		method = "smc";
> +	};
> +
> +	arm-pmu {
> +		compatible = "arm,cortex-a53-pmu";
> +		interrupts = <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>,
> +		             <GIC_SPI 5 IRQ_TYPE_LEVEL_HIGH>,
> +		             <GIC_SPI 6 IRQ_TYPE_LEVEL_HIGH>,
> +		             <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>;
> +	};

Please ad an interrupt-affinity property, as described in
Documentation/devicetree/bindings/arm/pmu.txt.

> +
> +	timer {
> +		compatible = "arm,armv8-timer";
> +		interrupts = <GIC_PPI 13
> +			(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
> +			     <GIC_PPI 14
> +			(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
> +			     <GIC_PPI 11
> +			(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
> +			     <GIC_PPI 10
> +			(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>;
> +	};
> +
> +	soc {
> +		compatible = "simple-bus";
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		ranges;
> +
> +		gic: interrupt-controller@...f1000 {
> +			compatible = "arm,gic-400";
> +			reg = <0x0 0xe00f1000 0x0 0x1000>,
> +			      <0x0 0xe00f2000 0x0 0x1000>,
> +			      <0x0 0xe00f4000 0x0 0x2000>,
> +			      <0x0 0xe00f6000 0x0 0x2000>;

I believe that the second entry should be 0x2000 in length.

Thanks,
Mark.