From: Mike Turquette <mturquette@ti.com>
To: Andrew Lunn <andrew@lunn.ch>,
Gregory CLEMENT <gregory.clement@free-electrons.com>
Cc: Andrew Lunn <andrew@lunn.ch>, <linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Subject: Re: [PATCH 1/2] clk: mvebu: armada 370/XP add clock gating control provider for DT
Date: Sun, 18 Nov 2012 20:30:34 -0800 [thread overview]
Message-ID: <20121119043034.21126.92888@nucleus> (raw)
In-Reply-To: <20121117135435.GA13479@lunn.ch>
Quoting Andrew Lunn (2012-11-17 05:54:35)
> > > What is the ddr clock for? Does bad things happen if you turn it off?
> > > Kirkwood has a similar clock, dunit, which i decided not to export,
> > > since when you turn it off, the whole SoC locks up.
> >
> > Well of course if you code run in DDR then it could be a problem. But
> > I think it could be useful to turn it off when going to suspend, it
> > the DDR can do self-refresh. In this case it should be possible to run
> > the code from SRAM or L2 Cache.
>
> O.K. Just watch out for the lateinit call in the clock framework.
>
CLK_IGNORE_UNUSED is the flag you want for this situation.
Regards,
Mike
> Andrew
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2012-11-19 4:31 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1353014906-31566-6-git-send-email-andrew@lunn.ch>
2012-11-16 18:01 ` [PATCH 0/2] Add clock gating support for Armada 370/XP Gregory CLEMENT
2012-11-16 18:01 ` [PATCH 1/2] clk: mvebu: armada 370/XP add clock gating control provider for DT Gregory CLEMENT
2012-11-17 8:26 ` Andrew Lunn
2012-11-17 9:41 ` Gregory CLEMENT
2012-11-17 13:54 ` Andrew Lunn
2012-11-19 4:30 ` Mike Turquette [this message]
2012-11-19 15:46 ` Thomas Petazzoni
2012-11-19 15:58 ` Andrew Lunn
2012-11-19 16:43 ` Thomas Petazzoni
2012-11-19 16:01 ` Sebastian Hesselbarth
2012-11-16 18:02 ` [PATCH 2/2] arm: mvebu: armada 370/XP adding clock gating support: dt binding Gregory CLEMENT
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