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From: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: Thomas Petazzoni
	<thomas.petazzoni-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
Cc: Gregory CLEMENT
	<gregory.clement-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>,
	Olof Johansson <olof-nZhT3qVonbNeoWH0uzbU5w@public.gmane.org>,
	Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>,
	Wim Van Sebroeck <wim-IQzOog9fTRqzQB+pC5nmwQ@public.gmane.org>,
	Guenter Roeck <linux-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>,
	kernel-build-reports-cunTk1MwBs8s++Sfvej+rw@public.gmane.org,
	linaro-kernel-cunTk1MwBs8s++Sfvej+rw@public.gmane.org,
	linux-next-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
	linux-watchdog-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: next-20160225 build: 2 failures 44 warnings (next-20160225)
Date: Fri, 26 Feb 2016 21:12:20 +0900	[thread overview]
Message-ID: <20160226121220.GO18327@sirena.org.uk> (raw)
In-Reply-To: <20160226091410.5dad4306-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>

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On Fri, Feb 26, 2016 at 09:14:10AM +0100, Thomas Petazzoni wrote:

> atomic_io_modify() is also used in the ->start() and ->stop() hooks, so
> not only during initialization. The reason we use atomic_io_modify()
> here is because this TIMER_CTRL register is shared with the clocksource
> drivers (time-orion.c, time-armada-370-xp.c). Indeed, the timers and
> watchdogs share a single register that allows to enable/disable all
> timers/watchdogs. Somewhat unfortunate choice, but that's how the HW is.

> By far the easiest solution is to add "depends on ARM" to
> ORION_WATCHDOG.

> Another solution would be to provide an implementation of
> atomic_io_modify() on arm64, though that would need the ACK from the
> ARM64 maintainers.

It also sounds like a more modern solution might be to use syscon for
the shared register, but perhaps I'm missing something about how the IP
is set up so ICBW.

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  parent reply	other threads:[~2016-02-26 12:12 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-02-25 10:04 next-20160225 build: 2 failures 44 warnings (next-20160225) Build bot for Mark Brown
2016-02-25 22:49 ` Stephen Rothwell
2016-02-26 10:37   ` Kirill A. Shutemov
2016-02-26  3:04 ` Mark Brown
2016-02-26  8:08   ` Thomas Petazzoni
2016-02-26 19:34     ` Bjorn Helgaas
2016-02-26  3:09 ` Mark Brown
     [not found]   ` <20160226030949.GL18327-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2016-02-26  7:41     ` Guenter Roeck
     [not found]       ` <56D001BE.2090209-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
2016-02-26  8:21         ` Thomas Petazzoni
2016-02-26  8:14     ` Thomas Petazzoni
     [not found]       ` <20160226091410.5dad4306-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
2016-02-26 12:12         ` Mark Brown [this message]
     [not found]           ` <20160226121220.GO18327-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2016-02-27 14:40             ` Thomas Petazzoni

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