Extending the swsusp Hibernation Framework to ARM - The Linux ...

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Other Devices• Many devices just need to know that their power domain lost context• Teach arch/arm/mach-omap2/powerdomain.c about hibernationinduced off modes.
Other Devices• Many devices that depend on a context loss count function pointer donot get that pointer under DT based systems– gpio-omap– omap_hsmmc– omap-serial• Currently a hack fix with a pointer toomap_pm_get_dev_context_loss_count• There is a need for a generic framework to inform devices when theyhave lost power
Page 3 and 4: Motivation• Hibernation provides
Page 5 and 6: swsusp
Page 7 and 8: OMAP PM• Clocks- Clock gating•
Page 9 and 10: WKUP Context• Used for:- Power, r
Page 11 and 12: PRCM• Reset state and module stat
Page 13 and 14: PRCM• Clocks- Leverage the clock
Page 15 and 16: pinctrl• Temporary measure, list
Page 17 and 18: pinctrl• Current solution is a bi
Page 19: SRAM• Internal memory on many OMA
Page 23 and 24: Other Devices• Some device *do* n
Page 25 and 26: Hibernation support for ARM• Mini
Page 27 and 28: Hibernation support for ARM• swsu
Page 29 and 30: AM33xx Hibernation Support●●●
Page 31 and 32: Restore from U-Boot31
Page 33 and 34: Kernel Modifications• U-Boot does
Page 35 and 36: swsusp Image Layout●●Each metad
Page 37 and 38: U-Boot Memory Mapping• The U-Boot
Page 39 and 40: Loading swsusp Pages Into Memory•
Page 41 and 42: Copy Remaining Pages• Moved remap
Page 43: Introducing:The Next-Gen BeagleBone

Extending the swsusp Hibernation Framework to ARM - The Linux ...

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