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

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Date:	Mon, 25 May 2015 14:41:33 +0200
From:	Pavel Machek <pavel@...x.de>
To:	Alan Tull <atull@...nsource.altera.com>
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

Hi!

> Suspend-to-RAM and EDAC support are mutually exclusive on SOCFPGA
> platforms.  CONFIG_SOCFPGA_SUSPEND enables suspend-to-RAM and
> prevents selecting CONFIG_EDAC_ALTERA_MC.

Do we went to have the dependency at the .config time? We would like
to do generic kernels booting on many machines, this kind of breaks
that...

> +	/*
> +	 * This code assumes that the bootloader has already
> +	 * properly configured the sdram controller:

Which bootloaders can do that? 

> +	 * sdr.ctrlcfg.lowpwreq.selfrfshmask = 3
> +	 * sdr.ctrlcfg.lowpwrtiming.clkdisablecycles = 8
> +	 * sdr.ctrlcfg.dramtiming4.selfrfshexit = 512

Would it make sense to configure it in Linux?

Thanks,
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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