linux-kernel - Re: [PATCH v9 3/5] ARM: dts: Renesas R9A06G032 base device tree file

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Message-ID: <e90e0670-3cf5-4430-3b4a-8f7ad520938d@arm.com>
Date:   Fri, 22 Jun 2018 13:25:56 +0100
From:   Marc Zyngier <marc.zyngier@....com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>,
        Michel Pollet <michel.pollet@...renesas.com>
Cc:     Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        Simon Horman <horms@...ge.net.au>,
        Phil Edworthy <phil.edworthy@...esas.com>,
        Michel Pollet <buserror+upstream@...il.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        linux-clk <linux-clk@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v9 3/5] ARM: dts: Renesas R9A06G032 base device tree file

On 22/06/18 13:14, Geert Uytterhoeven wrote:
> Hi Michel,
> 
> CC MarcZ
> 
> On Thu, Jun 14, 2018 at 1:02 PM Michel Pollet
> <michel.pollet@...renesas.com> wrote:
>> This adds the Renesas R9A06G032 bare bone support.
>>
>> This currently only handles the SYSCTRL block note,
>> generic parts (gic, architected timer) and a UART.
>>
>> Signed-off-by: Michel Pollet <michel.pollet@...renesas.com>
> 
>> --- /dev/null
>> +++ b/arch/arm/boot/dts/r9a06g032.dtsi
> 
>> +       timer {
>> +               compatible = "arm,cortex-a7-timer",
> 
> Checkpatch says:
> WARNING: DT compatible string "arm,cortex-a7-timer" appears
> un-documented -- check ./Documentation/devicetree/bindings/
> 
>> +                            "arm,armv7-timer";
> 
> Documentation/devicetree/bindings/arm/arch_timer.txt says:
> 
>     compatible should at least contain "arm,armv7-timer"
> 
> but fails to list other possible values?

The idea is that you could add something useful that matches your CPU.
Adding new CPU types in the binding seems to be a never ending battle...

> 
>> +               interrupt-parent = <&gic>;
>> +               arm,cpu-registers-not-fw-configured;

Really? :-(

Thanks,

	M.
-- 
Jazz is not dead. It just smells funny...