linux-kernel - Re: [RFC PATCH V2 8/8] irqchip/gic: Add support for tegra AGIC interrupt controller

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Date:	Fri, 18 Dec 2015 10:44:27 +0000
From:	Jon Hunter <jonathanh@...dia.com>
To:	Linus Walleij <linus.walleij@...aro.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
CC:	Thomas Gleixner <tglx@...utronix.de>,
	Jason Cooper <jason@...edaemon.net>,
	Marc Zyngier <marc.zyngier@....com>,
	Jiang Liu <jiang.liu@...ux.intel.com>,
	Stephen Warren <swarren@...dotorg.org>,
	Thierry Reding <thierry.reding@...il.com>,
	Kevin Hilman <khilman@...nel.org>,
	"Geert Uytterhoeven" <geert@...ux-m68k.org>,
	Grygorii Strashko <grygorii.strashko@...com>,
	Lars-Peter Clausen <lars@...afoo.de>,
	"Soren Brinkmann" <soren.brinkmann@...inx.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	Ulf Hansson <ulf.hansson@...aro.org>
Subject: Re: [RFC PATCH V2 8/8] irqchip/gic: Add support for tegra AGIC
 interrupt controller


On 17/12/15 13:32, Linus Walleij wrote:
> On Thu, Dec 17, 2015 at 11:48 AM, Jon Hunter <jonathanh@...dia.com> wrote:
> 
>> Add a driver for the Tegra-AGIC interrupt controller which is compatible
>> with the ARM GIC-400 interrupt controller.
> (...)
>> +static const struct dev_pm_ops gic_pm_ops = {
>> +       SET_RUNTIME_PM_OPS(gic_runtime_suspend,
>> +                          gic_runtime_resume, NULL)
>> +       SET_SYSTEM_SLEEP_PM_OPS(gic_suspend, gic_resume)
>> +};
> 
> Now you do what I commented on in the earlier patch: assign
> the runtime PM functions to normal suspend/resume.
> 
> This will have the effect of inhibiting any IRQs marked for
> wakeup on the GIC, even if you just want to go to sleep until
> something happens, will it not?
> 
> You should turn on the alarm clock before going to bed, not
> turn it off, as figure of speak ...

Yes I am alway having problems with my alarm, may be this is why ;-)

I see what you are saying, so if there are any wake-ups enabled then we
should not suspend the chip. Right?

Cheers
Jon
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