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From: haojian.zhuang@linaro.org (Haojian Zhuang)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 06/11] ARM: vexpress: use clocksource_of_init for sp804
Date: Wed, 13 Mar 2013 20:21:47 +0800
Message-ID: <CAD6h2NSUyFvhoqMsYqT=rzFZ--MWv+0vHOCtAV9n-5YO+LNTMA@mail.gmail.com> (raw)
In-Reply-To: <1363175175.3100.37.camel@hornet>

On 13 March 2013 19:46, Pawel Moll <pawel.moll@arm.com> wrote:
> On Wed, 2013-03-13 at 11:42 +0000, Haojian Zhuang wrote:
>> > I love the possibility of removing the SP804 code from the VE machine
>> > (thanks for your work!), but I'd like to avoid it being replaced by
>> > cryptic properties in the tree.
>> >
>> > Now, to get this right: I'm not saying that there should be completly no
>> > OS-specific (but neutral) properties for the clocking system.
>> >
>> > I'm saying that in "my" (the VE) case, there are four, effectively
>> > identical timers (each pair sharing an interrupt though). Every single
>> > one of them is perfectly capable of serving as clocksource or
>> > clockevent. Therefore I believe the driver/framework/OS should make its
>> > own decision.
>> >
>> I can move those properties into dts file instead.
>
> I'm not sure I understand you here...
>
>> If clocksource uses alias to configure source or event. There's still a lot
>> of work. At least we need to split dual timer into two timer devices in DTS.
>
> My point is: at least for VE there is _no need_ for any alias or special
> property in the tree (DTS). All timers are equal. The system can (and
> should) pick any one it wants.
>
> Pawe?
>
Do you mean that system wants to pick any one randomly? It's impossible.
Imagine that only TIMINT1 signal in sp804 is routed to interrupt controller.
Could system still pick any one it wants?

I think that clocksource or clockevent must be specified in DTS. Whatever
we're using alias or property.

  reply index

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-03-13  5:05 [PATCH v3 00/11] add hisilicon SoC support Haojian Zhuang
2013-03-13  5:05 ` [PATCH v3 01/11] clocksource: move sp timer driver Haojian Zhuang
2013-03-13  5:05 ` [PATCH v3 02/11] clocksource: select USE_OF by default Haojian Zhuang
2013-03-13  5:05 ` [PATCH v3 03/11] clocksource: sp804: add device tree support Haojian Zhuang
2013-03-13 11:05   ` Pawel Moll
2013-03-13 11:37     ` Haojian Zhuang
2013-03-13 11:41       ` Pawel Moll
2013-03-13 14:17     ` Rob Herring
2013-03-13 14:42       ` Pawel Moll
2013-03-13 14:51         ` Rob Herring
2013-03-13 14:55           ` Pawel Moll
2013-03-13 15:11             ` Haojian Zhuang
2013-03-13 15:23               ` Pawel Moll
2013-03-13 15:25                 ` Haojian Zhuang
2013-03-13 15:29                   ` Pawel Moll
2013-03-13 15:39                     ` Rob Herring
2013-03-13 15:41                       ` Pawel Moll
2013-03-13 15:44                         ` Haojian Zhuang
2013-03-13 15:42                     ` Haojian Zhuang
2013-03-13 15:49                       ` Pawel Moll
2013-03-13 16:35                         ` Arnd Bergmann
2013-03-13 16:41                           ` Pawel Moll
2013-03-15 12:20       ` Russell King - ARM Linux
2013-03-13  5:05 ` [PATCH v3 04/11] ARM: integrator: use clocksource_of_init for sp804 Haojian Zhuang
2013-03-13  5:05 ` [PATCH v3 05/11] ARM: highbank: " Haojian Zhuang
2013-03-13  5:05 ` [PATCH v3 06/11] ARM: vexpress: " Haojian Zhuang
2013-03-13 11:10   ` Pawel Moll
2013-03-13 11:42     ` Haojian Zhuang
2013-03-13 11:46       ` Pawel Moll
2013-03-13 12:21         ` Haojian Zhuang [this message]
2013-03-13 14:48           ` Pawel Moll
2013-03-13 15:01             ` Haojian Zhuang
2013-03-13 15:19               ` Pawel Moll
2013-03-13 15:59                 ` Haojian Zhuang
2013-03-13 16:28                   ` Pawel Moll
2013-03-13 16:32                   ` Rob Herring
2013-03-15 12:34                     ` Russell King - ARM Linux
2013-03-15 12:58                       ` Pawel Moll
2013-03-15 18:10                         ` Russell King - ARM Linux
2013-03-13  5:05 ` [PATCH v3 07/11] ARM: debug: support debug ll on hisilicon soc Haojian Zhuang
2013-03-13  5:05 ` [PATCH v3 08/11] clk: hi3xxx: add clock support Haojian Zhuang
2013-03-13  5:05 ` [PATCH v3 09/11] ARM: hi3xxx: add board support with device tree Haojian Zhuang
2013-03-13  5:05 ` [PATCH v3 10/11] ARM: hi3xxx: enable hi4511 " Haojian Zhuang
2013-03-13  5:05 ` [PATCH v3 11/11] ARM: config: append arch hi3xxx into multi defconfig Haojian Zhuang

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