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. Regards, Dave [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
