From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: ARM diagnostic register across suspend/resume
Date: Tue, 17 Jun 2014 11:23:44 +0100 [thread overview]
Message-ID: <20140617102344.GG23430@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <20140617102123.GA13808@arm.com>
On Tue, Jun 17, 2014 at 11:21:23AM +0100, Will Deacon wrote:
> I think that actually works ok, because writing zeroes doesn't actually
> do anything as far as I understand. The problem with suspend/resume is
> that the suspend/resume cycle could well clear the internal state and
> writing zeroes won't re-enable the workaround bits.
>
> I'll double-check this with the hardware guys, since this register really
> is undocumented.
Are you saying that it is write one to set, and writing zero is ignored?
If that's true, we should simplify the work-around code to get rid of the
read-modify-write.
--
FTTC broadband for 0.8mile line: now at 9.7Mbps down 460kbps up... slowly
improving, and getting towards what was expected from it.
next prev parent reply other threads:[~2014-06-17 10:23 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-17 8:31 ARM diagnostic register across suspend/resume Shawn Guo
2014-06-17 9:57 ` Will Deacon
2014-06-17 10:16 ` Russell King - ARM Linux
2014-06-17 10:21 ` Will Deacon
2014-06-17 10:23 ` Russell King - ARM Linux [this message]
2014-06-17 10:25 ` Will Deacon
2014-06-17 13:03 ` Shawn Guo
2014-06-17 14:34 ` Will Deacon
2014-06-17 14:54 ` Shawn Guo
2014-06-17 13:08 ` Shawn Guo
2014-06-17 14:02 ` Shawn Guo
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