linux-kernel - Re: [PATCH v4 1/2] ARM: socfpga: support suspend to ram

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Message-ID: <alpine.DEB.2.02.1505281520410.31038@linuxheads99>
Date:	Thu, 28 May 2015 15:21:43 -0500
From:	atull <atull@...nsource.altera.com>
To:	Pavel Machek <pavel@...x.de>
CC:	Dinh Nguyen <dinguyen@...nsource.altera.com>,
	Rob Herring <robh+dt@...nel.org>,
	Arnd Bergmann <arnd@...db.de>,
	Steffen Trumtrar <s.trumtrar@...gutronix.de>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	"Kumar Gala" <galak@...eaurora.org>, <devicetree@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>,
	Russell King <linux@....linux.org.uk>,
	<linux-arm-kernel@...ts.infradead.org>,
	Delicious Quinoq <delicious.quinoa@...il.com>
Subject: Re: [PATCH v4 1/2] ARM: socfpga: support suspend to ram

On Tue, 26 May 2015, Pavel Machek wrote:

> Hi!
> 
> > Thanks for the feedback.
> > 
> > Yes I agree.
> > 
> > One possibility is that I could add a suspend function to EDAC that
> > always fails with a helpful message like "Suspend with EDAC not
> > supported."  If someone wants to suspend, they'll have to take the
> > EDAC out of the device tree so its probe will bomb out.  I'm not
> > sure how normal it is to have suspend functions in the kernel
> > that always fail, though.
> 
> "Interesting" solution, but better than config exclusion, I'd say.
> 
> > > > +	/*
> > > > +	 * This code assumes that the bootloader has already
> > > > +	 * properly configured the sdram controller:
> > > 
> > > Which bootloaders can do that? 
> > 
> > Whatever bootloader is configuring the sdram controller for the
> > board.
> 
> Ok, so direct question: will mainline u-boot 2015.04 configure the
> controller correctly?

Should be in 2015.07

Alan Tull

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