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From: Felipe Balbi <balbi@ti.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: <linux-arm-kernel@lists.infradead.org>,
	Felipe Balbi <balbi@ti.com>, Tony Lindgren <tony@atomide.com>,
	<daniel.lezcano@linaro.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	<tglx@linutronix.de>,
	Linux OMAP Mailing List <linux-omap@vger.kernel.org>
Subject: Re: [RFC/PATCH 00/11] arm: omap: counter32k rework
Date: Wed, 30 Sep 2015 09:13:38 -0500	[thread overview]
Message-ID: <20150930141338.GC31865@saruman.tx.rr.com> (raw)
In-Reply-To: <1986790.syN3WBv9AR@wuerfel>

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On Wed, Sep 30, 2015 at 10:22:46AM +0200, Arnd Bergmann wrote:
> On Tuesday 29 September 2015 15:43:55 Felipe Balbi wrote:
> > 
> > the following patches de-obfuscate arch/arm/mach-omap2/timer.c
> > and start moving code to drivers/clocksource. So far only counter32k
> > has been moved over.
> > 
> > Note that we can't get rid of all the code (yet) because there are
> > still platforms relying to legacy boot and because of the strong
> > coupling with OMAP's hwmod layer.
> > 
> > This is, for now, an RFC and has be written on top of [1]. Boot tested
> > with AM335x and AM437x.
> > 
> > [1] http://marc.info/?l=linux-omap&m=144354336924308&w=2
> 
> Looks very nice!
> 
> > ps: if anybody has a good idea on how to get rid of
> > register_persistent_clock(), please let me know
> 
> I don't think we want to get rid of that, because it is the more
> accurate interface. IIRC systems that have an RTC will use
> timekeeping_inject_sleeptime64() in rtc_resume(). I don't know however
> how the two methods are coordinated, i.e. how the kernel ensures that
> exactly one of the two is used, but never both.

however register_persistent_clock() is an ARM-only thing, the question
was more towards that. Do we want to continue using the ARM-only
register_persistent_clock() or is there a more generic version of it ?

-- 
balbi

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  reply	other threads:[~2015-09-30 14:14 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-09-29 20:43 [RFC/PATCH 00/11] arm: omap: counter32k rework Felipe Balbi
2015-09-29 20:43 ` [RFC/PATCH 01/11] arm: omap2: timer: get rid of obfuscating macros Felipe Balbi
2015-09-29 20:43 ` [RFC/PATCH 02/11] arm: omap2: timer: add a gptimer argument to sync32k_timer_init() Felipe Balbi
2015-09-29 20:43 ` [RFC/PATCH 03/11] arm: omap2: timer: remove __omap_gptimer_init() Felipe Balbi
2015-10-05 11:01   ` Tony Lindgren
2015-10-05 15:24     ` Felipe Balbi
2015-10-05 16:02       ` Tony Lindgren
2015-10-05 16:08         ` Felipe Balbi
2015-10-05 16:30           ` Tony Lindgren
2015-09-29 20:43 ` [RFC/PATCH 04/11] arm: omap2: timer: provide generic sync32k_timer_init function Felipe Balbi
2015-09-29 20:44 ` [RFC/PATCH 05/11] arm: omap2: timer: move realtime_counter_init() around Felipe Balbi
2015-09-29 20:44 ` [RFC/PATCH 06/11] arm: omap2: timer: always call clocksource_of_init() when DT Felipe Balbi
2015-09-29 20:44 ` [RFC/PATCH 07/11] arm: omap2: timer: remove omap4_local_timer_init Felipe Balbi
2015-09-29 20:44 ` [RFC/PATCH 08/11] arm: omap2: timer: rename omap_sync32k_timer_init() Felipe Balbi
2015-09-29 20:44 ` [RFC/PATCH 09/11] clocksource: add TI 32.768 Hz counter driver Felipe Balbi
2015-10-01 21:58   ` John Stultz
2015-10-01 21:59   ` Daniel Lezcano
2015-10-05 10:50     ` Tony Lindgren
2015-10-05 11:03       ` Tony Lindgren
2015-10-01 22:20   ` John Stultz
2015-10-01 22:30     ` Felipe Balbi
2015-09-29 20:44 ` [RFC/PATCH 10/11] arm: omap2: timer: limit hwmod usage to non-DT boots Felipe Balbi
2015-09-29 20:44 ` [RFC/PATCH 11/11] arm: boot: dts: omap: add missing default status for 32k counter Felipe Balbi
2015-09-30  8:15   ` Arnd Bergmann
2015-09-30 14:12     ` Felipe Balbi
2015-09-30 21:58       ` Arnd Bergmann
2015-10-05 17:52         ` Felipe Balbi
2015-10-05 19:41           ` Felipe Balbi
2015-10-06  8:08             ` Arnd Bergmann
2015-10-06 14:57               ` Felipe Balbi
2015-10-06 15:18                 ` Tony Lindgren
2015-10-06 15:29                   ` Felipe Balbi
2015-10-05 10:45   ` Tony Lindgren
2015-09-30  8:22 ` [RFC/PATCH 00/11] arm: omap: counter32k rework Arnd Bergmann
2015-09-30 14:13   ` Felipe Balbi [this message]
2015-09-30 14:42     ` Arnd Bergmann
2015-09-30 14:49       ` Arnd Bergmann
2015-09-30 14:57         ` Felipe Balbi
2015-09-30 15:03         ` Thierry Reding
2015-10-01 22:12         ` Daniel Lezcano
2015-10-05 10:55           ` Tony Lindgren
2015-10-05 11:03             ` Arnd Bergmann
2015-10-05 11:13               ` Tony Lindgren
2015-10-05 12:19                 ` Arnd Bergmann

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