linux-kernel - Re: [PATCH v14 5/9] clocksource/drivers/arm_arch

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Date:   Fri, 21 Oct 2016 12:21:20 +0100
From:   Mark Rutland <mark.rutland@....com>
To:     fu.wei@...aro.org
Cc:     linaro-acpi@...ts.linaro.org, catalin.marinas@....com,
        will.deacon@....com, linux-kernel@...r.kernel.org,
        julien.grall@....com, wei@...hat.com, lorenzo.pieralisi@....com,
        al.stone@...aro.org, tn@...ihalf.com, timur@...eaurora.org,
        daniel.lezcano@...aro.org, linux-acpi@...r.kernel.org,
        linux@...ck-us.net, lenb@...nel.org, harba@...eaurora.org,
        linux-watchdog@...r.kernel.org, arnd@...db.de,
        marc.zyngier@....com, jcm@...hat.com, sudeep.holla@....com,
        cov@...eaurora.org, tglx@...utronix.de,
        linux-arm-kernel@...ts.infradead.org, graeme.gregory@...aro.org,
        rjw@...ysocki.net, rruigrok@...eaurora.org, leo.duran@....com,
        hanjun.guo@...aro.org, Suravee.Suthikulpanit@....com,
        wim@...ana.be, christoffer.dall@...aro.org
Subject: Re: [PATCH v14 5/9] clocksource/drivers/arm_arch_timer: Simplify
 ACPI support code.

On Fri, Oct 21, 2016 at 12:14:01PM +0100, Mark Rutland wrote:
> On Thu, Oct 20, 2016 at 05:58:17PM +0100, Mark Rutland wrote:
> > On Thu, Sep 29, 2016 at 02:17:13AM +0800, fu.wei@...aro.org wrote:
> > > +	arch_timer_ppi[PHYS_NONSECURE_PPI] = acpi_gtdt_map_ppi(PHYS_NONSECURE_PPI);
> > > +	arch_timer_ppi[VIRT_PPI] = acpi_gtdt_map_ppi(VIRT_PPI);
> > > +	arch_timer_ppi[HYP_PPI] = acpi_gtdt_map_ppi(HYP_PPI);
> > > +	/* Always-on capability */
> > > +	arch_timer_c3stop = acpi_gtdt_c3stop();
> > 
> > ... I think we should check the flag on the relevant interrupt, though
> > that's worth clarifying.
> 
> I see I misread the spec; this is part of the common flags.
> 
> Please ignore this point; sorry for the noise.

Actually, I misread the spec this time around; the flag *can* differ per
interrupt for the sysreg/cp15 timer, but not for the MMIO timers where
the flag is in a common field.

So please *do* consider the above.

Thanks,
Mark.