linux-kernel - Re: [PATCH v2 04/11] arm64: dts: Initial DTS files for Broadcom Stingray SOC

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Date:   Mon, 15 May 2017 09:04:20 -0700
From:   Scott Branden <scott.branden@...adcom.com>
To:     Mark Rutland <mark.rutland@....com>,
        Anup Patel <anup.patel@...adcom.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>, Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        Jon Mason <jonmason@...adcom.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Oza Pawandeep <oza.oza@...adcom.com>,
        Srinath Mannam <srinath.mannam@...adcom.com>,
        Pramod Kumar <pramod.kumar@...adcom.com>,
        Sandeep Tripathy <sandeep.tripathy@...adcom.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        bcm-kernel-feedback-list@...adcom.com
Subject: Re: [PATCH v2 04/11] arm64: dts: Initial DTS files for Broadcom
 Stingray SOC



On 17-05-15 06:13 AM, Mark Rutland wrote:
> Hi,
>
> On Mon, May 15, 2017 at 05:32:14PM +0530, Anup Patel wrote:
>> +/ {
>> +	chosen { /* Default kernel args */
>> +		bootargs = "root=/dev/ram rw rootwait \
>> +			    earlycon=uart8250,mmio32,0x68a10000 \
>> +			    pci=pcie_bus_safe cma=64M";
>
> Why do we need all of these?
Agreed - we don't need the default kernels args here - they are passed 
in by bootloader as needed.
>
>> +		linux,stdout-path = "serial0:115200n8";
>
> Please drop the 'linux,' prefix here.
>
> [...]
>
>> +	memory: memory@...00000 {
>> +		device_type = "memory";
>> +		reg = <0x00000000 0x80000000 0 0x40000000>;
>> +	};
>> +
>> +	psci {
>> +		compatible = "arm,psci-0.2";
>> +		method = "smc";
>> +	};
>> +
>> +	pmu {
>> +		compatible = "arm,armv8-pmuv3";
>> +		interrupts = <GIC_PPI 7 IRQ_TYPE_LEVEL_HIGH>;
>> +	};
>> +
>> +	timer {
>> +		compatible = "arm,armv8-timer";
>> +		interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(8) |
>> +			      IRQ_TYPE_LEVEL_LOW)>,
>> +			     <GIC_PPI 14 (GIC_CPU_MASK_SIMPLE(8) |
>> +			      IRQ_TYPE_LEVEL_LOW)>,
>> +			     <GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(8) |
>> +			      IRQ_TYPE_LEVEL_LOW)>,
>> +			     <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(8) |
>> +			      IRQ_TYPE_LEVEL_LOW)>;
>
> GICv3 PPIs don't have a mask. See
>
> Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.txt
>
> Please remove the GIC_CPU_MASK_*() uses here and in this dts. They
> shouldn't be there.
>
> Thanks,
> Mark.
>