From: Ian Campbell <ijc@hellion.org.uk>
To: linux-sunxi@googlegroups.com
Cc: Fan Rong <cinifr@gmail.com>, "coosty@163.com" <coosty@163.com>,
"maxime.ripard@free-electrons.com"
<maxime.ripard@free-electrons.com>,
"daniel.lezcano@linaro.org" <daniel.lezcano@linaro.org>,
"linux@arm.linux.org.uk" <linux@arm.linux.org.uk>,
"tglx@linutronix.de" <tglx@linutronix.de>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"pawel.moll@arm.co" <pawel.moll@arm.co>,
"rob.herring@calxeda.com" <rob.herring@calxeda.com>
Subject: Re: [linux-sunxi] Re: [PATCH 4/4] Add arch count timer node in dts for Allwinner A20(sunxi 7i).
Date: Thu, 12 Sep 2013 16:44:46 +0100 [thread overview]
Message-ID: <1379000686.10076.76.camel@kazak.uk.xensource.com> (raw)
In-Reply-To: <20130912145756.GD22013@e106331-lin.cambridge.arm.com>
On Thu, 2013-09-12 at 15:57 +0100, Mark Rutland wrote:
> > + interrupts = <1 13 0x308>,
> > + <1 14 0x308>,
> > + <1 11 0x308>,
> > + <1 10 0x308>;
> > + clock-frequency = <24000000>;
>
> If at all possible, your bootloader should set CNTFREQ, and
> clock-frequency should only be used as a last resort when it's
> impossible to get it to set CNTFREQ. It's not possible to set CNTFREQ
> from the non-secure side, so guests (which might not be Linux, and might
> not handle DT in the same way) may see a completely wrong frequency
> value.
https://groups.google.com/forum/#!topic/linux-sunxi/56Wj1IT-pKU
Ian.
next prev parent reply other threads:[~2013-09-12 15:44 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-12 6:51 [PATCH 0/4] Add smp support for Allwinner A20 and phy arch count timer Fan Rong
2013-09-12 6:51 ` [PATCH 1/4] Add smp support for Allwinner A20(sunxi 7i) Fan Rong
2013-09-12 14:26 ` Mark Rutland
2013-09-12 15:53 ` cinifr
2013-09-12 14:40 ` Russell King - ARM Linux
2013-09-12 6:51 ` [PATCH 2/4] Add cpuconfig nodes in dts for smp configure Fan Rong
2013-09-14 11:50 ` Maxime Ripard
2013-09-12 6:51 ` [PATCH 3/4] Add physical count arch timer support for clocksource in ARMv7 Fan Rong
2013-09-12 11:24 ` Mark Rutland
2013-09-12 14:33 ` Russell King - ARM Linux
2013-09-12 16:09 ` cinifr
2013-09-12 15:39 ` [linux-sunxi] " Ian Campbell
2013-09-12 16:07 ` cinifr
2013-09-12 16:39 ` Marc Zyngier
2013-09-13 8:49 ` cinifr
2013-09-13 9:30 ` Marc Zyngier
2013-09-13 13:09 ` cinifr
2013-09-13 13:40 ` Marc Zyngier
2013-09-13 14:55 ` cinifr
2013-09-18 9:03 ` cinifr
2013-09-14 12:05 ` maxime.ripard
2013-09-16 8:16 ` Marc Zyngier
2013-09-12 6:51 ` [PATCH 4/4] Add arch count timer node in dts for Allwinner A20(sunxi 7i) Fan Rong
2013-09-12 14:57 ` Mark Rutland
2013-09-12 15:44 ` Ian Campbell [this message]
2013-09-12 16:23 ` [linux-sunxi] " cinifr
2013-09-12 19:53 ` Henrik Nordström
2013-09-12 14:39 ` [PATCH 0/4] Add smp support for Allwinner A20 and phy arch count timer Mark Rutland
2013-09-12 15:46 ` cinifr
2013-09-13 11:20 ` Mark Rutland
2013-09-13 13:23 ` cinifr
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