* Dave Gerlach <d-gerlach@xxxxxx> [150120 12:35]: > Tony, > On 01/20/2015 12:03 PM, Tony Lindgren wrote: > > * Dave Gerlach <d-gerlach@xxxxxx> [141126 13:54]: > >> Hi, > >> This series is v5 of the series to add suspend/resume support for Texas > >> Instruments AM335x SoC. It has gone through a rather major overhaul > >> since the last version and because of that has been split into multiple > >> different sets of patches, on which this series depends. Previous discussion > >> that influenced there changes can be found here [1]. This series depends on > >> generic sram exec mapping patch here [2], emif series here [3], > >> and wkup_m3_ipc series here [4]. I have pushed a branch containing the patches > >> from ALL required series here [5] for testing or a view of the high level > >> flow of the entire series. > >> > >> The largest change with this revision is the introduction of a > >> wkup_m3_ipc driver which handles all communication with the Cortex M3 > >> present on am335x for handling low power tasks. Previously this was > >> handled in the wkup_m3_rproc driver (also sent in an earlier series) > >> but that driver is now only responsible for booting the wkup_m3. The > >> wkup_m3_ipc driver exposes an API with all required PM functionality > >> needed by the PM code introduced by this series, so the PM code has > >> shrunk considerably. > >> > >> Another major change is that the EMIF code previously present in the > >> sleep33xx asm code and pm33xx code for save and restore of EMIF context > >> and entry into low power mode has all been moved in to a separate EMIF > >> driver, further reducing the size of the PM code. Because of this, moving > >> the emif header defines into include/linux/ti_emif.h is no longer necessary. > >> > >> Other changes include clean up of the timer suspend/resume handlers, now > >> look up hwmod in init and use that handle along with renaming to > >> *_idle/*_unidle to avoid confusion with true suspend handlers. > >> > >> Suspend support requires: > >> CONFIG_TI_EMIF_SRAM > >> CONFIG_WKUP_M3_RPROC > >> CONFIG_WKUP_M3_IPC > >> > >> And also requires AM335x USB support to be enabled to work for multiple > >> cycles. If you want to load firmware from rootfs in /lib/firmware you now > >> must also select CONFIG_FW_LOADER_USER_HELPER_FALLBACK. > >> > >> This code works with version 0x189 of the CM3 firmware found here [6] on > >> the next branch, /bin/am335x-pm-firmware.elf. > > > > Dave, does this series have dependencies to the other patches? Can some > > parts of this already be applied without breaking anything? > > > > The only patch with no dependencies is patch 1 (ARM: OMAP2+: timer: Add > suspend-resume callbacks for clkevent device). It's ready to be applied, I just > applied to v3.19-rc5 and built and booted on am335x-evm with no issue just to be > sure. It won't actually do anything until suspend is completely implemented. OK thanks for checking, best to wait until it's usable then. Regards, Tony -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
