From: arnd@arndb•de (Arnd Bergmann)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH v2 05/14] ARM: integrator: use clocksource_of_init for sp804
Date: Tue, 12 Mar 2013 19:33:47 +0000 [thread overview]
Message-ID: <201303121933.47994.arnd@arndb.de> (raw)
In-Reply-To: <513F7EBD.80207@gmail.com>
On Tuesday 12 March 2013, Rob Herring wrote:
> On 03/12/2013 12:08 PM, Haojian Zhuang wrote:
> You are breaking existing dtb's changing this, but this is wrong for
> other reasons. The integrator does not have an SP804. It is the same
> programming model, but is a single timer and not the dual timer. So
> having a different compatible string is the correct way. I doubt it has
> the primecell ID registers which is what "arm,primecell" indicates.
At least the qemu model has the primecell ID only for actual sp804 but
not for the integrator, see http://git.qemu.org/?p=qemu.git;a=blob;f=hw/arm_timer.c
> > };
> >
> > timer1: timer at 13000100 {
> > - compatible = "arm,integrator-timer";
> > + compatible = "arm,sp804", "arm,primecell";
> > + arm,sp804-clockevent = <0>;
>
> I don't like this nor the old way with aliases. We should describe the
> h/w features of the timer to determine what to use it for. AFAICT, all 3
> timers are identical on integrator and it does not matter which one
> Linux picks for clocksource vs. clockevent.
Interesting point. I remember we had a discussion about this when the
initial binding integrator code was merged, but I don't remember what
the intent was for doing it like this. Probably just minimizing the
changes to the existing code.
Arnd
next prev parent reply other threads:[~2013-03-12 19:33 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-12 17:08 [PATCH v2 00/14] add hisilicon soc support Haojian Zhuang
2013-03-12 17:08 ` [PATCH v2 01/14] clocksource: move sp timer driver Haojian Zhuang
2013-03-12 18:11 ` Arnd Bergmann
2013-03-13 2:20 ` Haojian Zhuang
2013-03-12 19:08 ` Russell King - ARM Linux
2013-03-12 17:08 ` [PATCH v2 02/14] clocksource: sp804: add device tree support Haojian Zhuang
2013-03-12 18:14 ` Arnd Bergmann
2013-03-12 18:51 ` Arnd Bergmann
2013-03-12 18:53 ` Rob Herring
2013-03-12 17:08 ` [PATCH v2 03/14] clocksource: sp804: append CONFIG_OF Haojian Zhuang
2013-03-12 19:17 ` Arnd Bergmann
2013-03-13 3:25 ` Haojian Zhuang
2013-03-14 13:48 ` Arnd Bergmann
2013-03-12 17:08 ` [PATCH v2 04/14] ARM: highbank: use clocksource_of_init for sp804 Haojian Zhuang
2013-03-12 17:08 ` [PATCH v2 05/14] ARM: integrator: " Haojian Zhuang
2013-03-12 18:54 ` Arnd Bergmann
2013-03-13 2:00 ` Haojian Zhuang
2013-03-13 5:25 ` Linus Walleij
2013-03-12 19:15 ` Rob Herring
2013-03-12 19:33 ` Arnd Bergmann [this message]
2013-03-12 20:52 ` Rob Herring
2013-03-13 2:04 ` Haojian Zhuang
2013-03-13 6:41 ` Linus Walleij
2013-03-13 7:09 ` Haojian Zhuang
2013-03-13 8:43 ` Arnd Bergmann
2013-03-13 9:00 ` Linus Walleij
2013-03-15 12:15 ` Russell King - ARM Linux
2013-03-15 13:59 ` Linus Walleij
2013-03-13 13:56 ` Rob Herring
2013-03-13 9:03 ` Linus Walleij
2013-03-15 11:54 ` Russell King - ARM Linux
2013-03-13 6:35 ` Linus Walleij
2013-03-12 17:08 ` [PATCH v2 06/14] ARM: vexpress: " Haojian Zhuang
2013-03-12 17:08 ` [PATCH v2 07/14] ARM: debug: support debug ll on hisilicon soc Haojian Zhuang
2013-03-12 17:08 ` [PATCH v2 08/14] clk: hs: add clock support Haojian Zhuang
2013-03-12 19:00 ` Arnd Bergmann
2013-03-13 4:08 ` Haojian Zhuang
2013-03-12 17:08 ` [PATCH v2 09/14] ARM: hs: add board support with device tree Haojian Zhuang
2013-03-12 17:08 ` [PATCH v2 10/14] ARM: hs: enable hi4511 " Haojian Zhuang
2013-03-12 17:08 ` [PATCH v2 11/14] ARM: config: append arch hs into multi defconfig Haojian Zhuang
2013-03-12 17:08 ` [PATCH v2 12/14] Document: append hisilicon clock binding Haojian Zhuang
2013-03-12 17:08 ` [PATCH v2 13/14] Document: dts: create hisilicon document Haojian Zhuang
2013-03-12 17:08 ` [PATCH v2 14/14] Document: add device tree binding file for sp804 Haojian Zhuang
2013-03-12 19:02 ` Arnd Bergmann
2013-03-13 1:45 ` Haojian Zhuang
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=201303121933.47994.arnd@arndb.de \
--to=arnd@arndb$(echo .)de \
--cc=linux-arm-kernel@lists$(echo .)infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox