linux-kernel - Re: [PATCH v2 05/12] ARM: davinci: da850: switch to using the clocksource driver

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Message-ID: <CAMpxmJUXuxEp+424Z_YtAq02XvBzcDAj73LgOBnXE-T0fhmCTQ@mail.gmail.com>
Date:   Fri, 8 Feb 2019 13:47:56 +0100
From:   Bartosz Golaszewski <bgolaszewski@...libre.com>
To:     Sekhar Nori <nsekhar@...com>
Cc:     Bartosz Golaszewski <brgl@...ev.pl>,
        Kevin Hilman <khilman@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        arm-soc <linux-arm-kernel@...ts.infradead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-devicetree <devicetree@...r.kernel.org>
Subject: Re: [PATCH v2 05/12] ARM: davinci: da850: switch to using the
 clocksource driver

pt., 8 lut 2019 o 13:37 Sekhar Nori <nsekhar@...com> napisał(a):
>
> On 08/02/19 6:04 PM, Bartosz Golaszewski wrote:
> > pt., 8 lut 2019 o 13:06 Sekhar Nori <nsekhar@...com> napisał(a):
> >>
> >> On 04/02/19 10:47 PM, Bartosz Golaszewski wrote:
> >>> +static const struct davinci_timer_cfg da850_timer_cfg = {
> >>> +     .reg = {
> >>> +             .start          = DA8XX_TIMER64P0_BASE,
> >>> +             .end            = DA8XX_TIMER64P0_BASE + SZ_4K,
> >>
> >> SZ_4K - 1
> >>
> >> This should have prevented watchdog timer from getting registered.
> >>
> >> Thanks,
> >> Sekhar
> >
> > My clocksource driver doesn't call request_region() so a subsequent
> > devm_ioremap_resource() in the watchdog driver would still succeed. I
> > now fixed both the missing call and the value here.
>
> Ah, got it. Perhaps a call to request_region() should be added to catch
> issues?
>

Yes, that's what I meant by "fixing the missing call". It will be
there in v3. Actually the kernel seems to be missing a non-managed
ioremap_resource() helper. Maybe I should add it as well.

Bart