Hi,

This set adds core retention support on top of mainline. The set
also adds IO CHAIN wakeup capability for OMAP4, which is a nice feature
to have while trying suspend / resume with CSWR as it is quite difficult
to wake up the device without this.

Patch 6 might cause some stir, but this is needed as omap4 PRCM chain
handler currently does not work without SPARSE_IRQ. Enabling the
SPARSE_IRQ causes a WARN from gic during boot for omap4, and attempting
to fix this creates some spam from interrupt handling code which seems to
originate from GPMC/GPIO. Also, omap3 boot breaks completely,
thus it is impossible to enable this option as of now.

Tested on OMAP4 blaze board, with OMAP4430 EMU chip. Suspend / resume
works nicely, and wakeup with UART3 works. The powerdomain state info
under pm-debug appears to be somewhat bogus right after boot, but fixes
itself during suspend. This should be addressed separately. Also
verified that suspend / resume with OMAP3 beagle is okay.

-Tero

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