Messages in this thread | | | Date | Thu, 25 Sep 2014 10:25:06 +0200 | From | Steffen Trumtrar <> | Subject | Re: [PATCH 2/2] socfpga: support suspend to ram |
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Hi!
On Wed, Sep 24, 2014 at 03:27:29PM -0500, atull@opensource.altera.com wrote: > From: Alan Tull <atull@opensource.altera.com> > > Add code that requests that the sdr controller go into > self-refresh mode. This code is run from ocram. > > This patch assumes that u-boot has already configured sdr: > sdr.ctrlcfg.lowpwreq.selfrfshmask = 3 > sdr.ctrlcfg.lowpwrtiming.clkdisablecycles = 8 > sdr.ctrlcfg.dramtiming4.selfrfshexit = 512 > > How to suspend to ram: > $ echo enabled > \ > /sys/devices/soc/ffc02000.serial0/tty/ttyS0/power/wakeup > > $ echo -n mem > /sys/power/state >
(...)
Never looked into that, so maybe a stupid question: What happens if the bootloader (u-boot or other) didn't configure the sdr? Will it "just" not wake up again?
Regards, Steffen
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