linux-kernel - Re: [PATCH 14/15] dt-bindings: arm-gic: Drop 'clock-names' from binding document

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Date:	Fri, 18 Mar 2016 11:52:17 +0100
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Jon Hunter <jonathanh@...dia.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Jason Cooper <jason@...edaemon.net>,
	Marc Zyngier <marc.zyngier@....com>,
	Benoît Cousson <bcousson@...libre.com>,
	Tony Lindgren <tony@...mide.com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Stephen Warren <swarren@...dotorg.org>,
	Thierry Reding <thierry.reding@...il.com>,
	Kevin Hilman <khilman@...nel.org>,
	Grygorii Strashko <grygorii.strashko@...com>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Linus Walleij <linus.walleij@...aro.org>,
	linux-tegra@...r.kernel.org,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 14/15] dt-bindings: arm-gic: Drop 'clock-names' from
 binding document

Hi Jon,

On Fri, Mar 18, 2016 at 11:13 AM, Jon Hunter <jonathanh@...dia.com> wrote:
> On 18/03/16 09:13, Geert Uytterhoeven wrote:
>> On Thu, Mar 17, 2016 at 3:19 PM, Jon Hunter <jonathanh@...dia.com> wrote:
>>> Commit afbbd2338176 ("irqchip/gic: Document optional Clock and Power
>>> Domain properties") documented optional clock and power-dmoain properties
>>> for the ARM GIC. Currently, there are no users of these and for the
>>> Tegra210 Audio GIC (based upon the GIC-400) there are two clocks, a
>>> functional clock and interface clock, that need to be enabled.
>>
>> The reason that there are no users for this is twofold:
>>   1. The GIC driver doesn't have Runtime PM support yet,
>>   2. There was no clean way to prevent the GIC's clock from being disabled.
>> Due to this, adding the clocks to the DTSes would mean that they will be
>> disabled during boot up as unused clocks, leading to a system lock-up.
>>
>> I had hoped your series would fix part 1. I gave it a try on r8a7791/koelsch,
>> but unfortunately it seems the platform driver only supports non-root
>> controllers, while the r8a7791 GIC is the primary one...
>
> Can you try making the following change ...

Thanks! I gave it a try, but no difference.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds