From: Vineet Gupta <Vineet.Gupta1@synopsys.com>
To: Noam Camus <noamca@mellanox.com>,
Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: "robh+dt@kernel.org" <robh+dt@kernel.org>,
"mark.rutland@arm.com" <mark.rutland@arm.com>,
"tglx@linutronix.de" <tglx@linutronix.de>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2 3/3] clocksource: Add clockevent support to NPS400 driver
Date: Mon, 31 Oct 2016 10:51:40 -0700 [thread overview]
Message-ID: <35bde193-8492-83e0-fb03-8385d8afd007@synopsys.com> (raw)
In-Reply-To: <DB6PR0501MB2518720A0F95ACBBBCB1CB27AAAE0@DB6PR0501MB2518.eurprd05.prod.outlook.com>
Hi Daniel,
On 10/31/2016 10:03 AM, Noam Camus wrote:
>> Oops, wait. Here, arch/arc/kernel/time.c should be moved in drivers/clocksource and consolidated with this driver.
>> >Very likely, CPUHP_AP_ARC_TIMER_STARTING can be used for all ARC timers.
> Indeed the ARC timer driver served as my inspiration but due to HW threads handling they are not the same.
> Moving drivers from arch/arc to driver/clocksource is not my call (Vineet Gupta is the maintainer of ARC)
> And I think they quiet differ now so consolidation gain is not obvious.
Sorry this was on my todo list at low priority. Anyways took a quick look at it now.
The problem is timer code overlaps pure driver land and ARC specific code. e.g.
CONFIG_ARC_HAS_RTC clocksource needs to check whether hardware exists or not. We
currently conveniently check that from cpuinfo populated at boot time. Now either
I need to export that info as a function (which should be done anyways) - but then
define stub for !ARC. Either that or duplicate the detection code here (orig copy
in arc setup.c)
So doing this exercise cleanly would mean exporting much of
arch/arc/include/asm/{arcregs.h, mcip.h} out of ARC into include/soc/arc/*. Isn't
this kind of going back to include/asm-<arch>/* days ?
Honestly I do want to move the driver in the right place but not sure how to do
this cleanly.
Thoughts ?
-Vineet
next prev parent reply other threads:[~2016-10-31 17:51 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-23 12:12 [PATCH v2 0/3] Add clockevet for timer-nps driver to NPS400 SoC Noam Camus
2016-10-23 12:12 ` [PATCH v2 1/3] soc: Support for NPS HW scheduling Noam Camus
2016-10-31 10:26 ` Daniel Lezcano
2016-10-31 12:26 ` Noam Camus
2016-10-23 12:12 ` [PATCH v2 2/3] clocksource: update "fn" at CLOCKSOURCE_OF_DECLARE() of nps400 timer Noam Camus
2016-10-31 10:28 ` Daniel Lezcano
2016-10-31 15:19 ` Noam Camus
2016-10-23 12:12 ` [PATCH v2 3/3] clocksource: Add clockevent support to NPS400 driver Noam Camus
2016-10-30 20:41 ` Rob Herring
2016-10-31 10:52 ` Daniel Lezcano
2016-10-31 17:03 ` Noam Camus
2016-10-31 17:51 ` Vineet Gupta [this message]
2016-10-31 22:48 ` [PATCH 0/9] Move ARC timer code into drivers/clocksource/ Vineet Gupta
2016-10-31 22:48 ` [PATCH 1/9] ARC: timer: gfrc, rtc: Read BCR to detect whether hardware exists Vineet Gupta
2016-11-03 17:00 ` Daniel Lezcano
2016-11-03 17:41 ` Vineet Gupta
2016-10-31 22:48 ` [PATCH 2/9] ARC: timer: rtc: implement read loop in "C" vs. inline asm Vineet Gupta
2016-11-03 17:02 ` Daniel Lezcano
2016-11-03 17:45 ` Vineet Gupta
2016-10-31 22:48 ` [PATCH 3/9] ARC: timer: gfrc: boot print alongside other timers Vineet Gupta
2016-11-03 17:09 ` Daniel Lezcano
2016-11-03 17:47 ` Vineet Gupta
2016-11-03 17:51 ` Daniel Lezcano
2016-10-31 22:48 ` [PATCH 4/9] ARC: time: move time_init() out of the driver Vineet Gupta
2016-11-03 17:15 ` Daniel Lezcano
2016-10-31 22:48 ` [PATCH 5/9] ARC: breakout aux handling into a seperate header Vineet Gupta
2016-11-01 7:49 ` Noam Camus
2016-10-31 22:48 ` [PATCH 6/9] ARC: move mcip.h into include/soc and adjust the includes Vineet Gupta
2016-11-03 17:20 ` Daniel Lezcano
2016-10-31 22:48 ` [PATCH 7/9] ARC: breakout timer stuff into a seperate header Vineet Gupta
2016-11-03 17:25 ` Daniel Lezcano
2016-10-31 22:48 ` [PATCH 8/9] ARC: timer: rename config options Vineet Gupta
2016-10-31 22:48 ` [PATCH 9/9] clocksource: import ARC timer driver Vineet Gupta
2016-11-01 0:01 ` kbuild test robot
2016-11-01 0:45 ` Vineet Gupta
2016-11-01 20:42 ` Daniel Lezcano
2016-11-01 20:57 ` Vineet Gupta
2016-11-02 0:19 ` Daniel Lezcano
2016-11-02 1:03 ` Vineet Gupta
2016-11-03 16:40 ` Vineet Gupta
2016-11-03 16:50 ` Daniel Lezcano
2016-11-03 17:57 ` Vineet Gupta
2016-11-03 18:11 ` Daniel Lezcano
2016-11-03 18:43 ` Vineet Gupta
2016-11-03 17:33 ` Daniel Lezcano
2016-11-03 18:14 ` Daniel Lezcano
2016-11-03 18:47 ` Vineet Gupta
2016-11-03 17:28 ` [PATCH 0/9] Move ARC timer code into drivers/clocksource/ Daniel Lezcano
2016-11-01 20:01 ` [PATCH v2 3/3] clocksource: Add clockevent support to NPS400 driver Daniel Lezcano
2016-11-08 8:30 ` Noam Camus
2016-11-10 10:34 ` Daniel Lezcano
2016-11-10 13:00 ` Noam Camus
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