* 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? Regards, Tony > [1] http://www.spinics.net/lists/linux-omap/msg109331.html > [2] http://www.spinics.net/linux/lists/kernel/msg1876629.html > [3] http://www.spinics.net/linux/lists/kernel/msg1876646.html > [4] http://www.spinics.net/linux/lists/kernel/msg1876642.html > [5] https://github.com/dgerlach/linux-pm/tree/rfc-pm-am335x-v3.18-rc6 > [6] https://git.ti.com/ti-cm3-pm-firmware/amx3-cm3/commits/next > > Dave Gerlach (3): > ARM: OMAP2+: AM33XX: Add assembly code for PM operations > ARM: OMAP2+: AM33XX: Basic suspend resume support > ARM: OMAP2+: AM33XX: Hookup AM33XX PM code into OMAP builds > > Vaibhav Bedia (1): > ARM: OMAP2+: timer: Add suspend-resume callbacks for clkevent device > > arch/arm/boot/dts/am33xx.dtsi | 2 + > arch/arm/mach-omap2/Makefile | 2 + > arch/arm/mach-omap2/common.h | 9 ++ > arch/arm/mach-omap2/io.c | 1 + > arch/arm/mach-omap2/pm.h | 6 + > arch/arm/mach-omap2/pm33xx.c | 250 ++++++++++++++++++++++++++++++++++++++++ > arch/arm/mach-omap2/sleep33xx.S | 216 ++++++++++++++++++++++++++++++++++ > arch/arm/mach-omap2/timer.c | 28 +++++ > 8 files changed, 514 insertions(+) > create mode 100644 arch/arm/mach-omap2/pm33xx.c > create mode 100644 arch/arm/mach-omap2/sleep33xx.S > > -- > 2.1.0 > -- 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
