Hi Markus, On Fri, Jun 13, 2025 at 03:19:20PM +0200, Markus Schneider-Pargmann wrote: > Hi, > > this series introduces support to resume from IO+DDR. IO+DDR is a low > power mode of am62a and am62p in which nearly everything is powered off > except DDR which is in self-refresh and a few pins which detect > activity and can wakeup the system again. > > On resume uboot SPL is loaded and checks if this is a IO+DDR resume. If > it is, the DDR initialization sequence in k3-ddrss differs slightly as > it has to get the DDR out of the self-refresh. > > Afterward a specific address determined from DT is used to get the > metadata that stores relevant context addresses. The context is restored > using the tisci message TI_SCI_MSG_MIN_CONTEXT_RESTORE. At the end all > further initializations are skipped and uboot SPL directly jumps into > the DM resume address which takes care of the rest. > > The devicetree R5F related patches were picked up from the devicetree > repository tag v6.16-rc1-dts and are required to find the correct > address of the metadata. I picked some additional patches to avoid > conflicts.
The DT cherry-picks seems fine to me. Feel free to add following to those DT cherry-picks: Reviewed-by: Sumit Garg <sumit.g...@oss.qualcomm.com> -Sumit > > k3-ddrss is using absolute register accesses at the moment. I am trying > to submit syscon DT patches upstream to access these through syscon, > unfortunately there is ongoing discussion regarding syscon. > > This series is based on next. > > I tested this on am62a. > > Best, > Markus > > Signed-off-by: Markus Schneider-Pargmann <m...@baylibre.com> > --- > Changes in v2: > - Remove 'default n' from K3_IODDR > - Pick devicetree patches from upstream instead of mailinglist > - Link to v1: > https://lore.kernel.org/r/20250311-topic-am62-ioddr-v2025-04-rc1-v1-0-666de9c10...@baylibre.com > > --- > Devarsh Thakkar (3): > arm64: dts: ti: k3-am62a-wakeup: Add R5F device node > arm64: dts: ti: k3-am62a7-sk: Enable IPC with remote processors > arm64: dts: ti: k3-am62p5-sk: Enable IPC with remote processors > > Hari Nagalla (2): > arm64: dts: ti: k3-am62a-mcu: Add R5F remote proc node > arm64: dts: ti: k3-am62x-sk-common: Enable IPC with remote processors > > Jai Luthra (1): > arm64: dts: ti: k3-am62a-main: Add C7xv device node > > Judith Mendez (3): > arm64: dts: ti: k3-am62a7-sk: Enable PWM > arm64: dts: ti: k3-am6*: Add boot phase flag to support MMC boot > arm64: dts: ti: k3-am6*: Remove disable-wp for eMMC > > Markus Schneider-Pargmann (13): > arm: mach-k3: Remove CANUART IO isolation > arm: mach-k3: Kconfig: Add symbols for IO+DDR Low Power Mode > ram: k3-ddrss: Add support for DDR in self-refresh > firmware: ti_sci: Add TI_SCI_MSG_MIN_CONTEXT_RESTORE > arm: mach-k3: common: Add CANUART wakeup check helpers > arm: mach-k3: common: Add lpm_resume_from_ddr > arm: mach-k3: common: Helper for LPM meta data address from DT > arm: mach-k3: am62a7_init: Resume on LPM exit > arm: mach-k3: am62p5_init: Resume on LPM exit > arm: dts: k3-am62a: Add r5 device nodes > arm: dts: k3-am62p: Add r5 device nodes > configs: am62ax_evm_r5: Enable IODDR resume support > configs: am62p_evm_r5_defconfig: Enable IODDR resume support > > arch/arm/dts/k3-am62a7-sk-u-boot.dtsi | 16 ++ > arch/arm/dts/k3-am62p5-sk-u-boot.dtsi | 20 +++ > arch/arm/mach-k3/Kconfig | 8 + > arch/arm/mach-k3/am62ax/am62a7_init.c | 11 ++ > arch/arm/mach-k3/am62px/am62p5_init.c | 12 ++ > arch/arm/mach-k3/am62x/am625_init.c | 2 + > arch/arm/mach-k3/common.c | 162 ++++++++++++++++++++ > arch/arm/mach-k3/common.h | 4 + > arch/arm/mach-k3/include/mach/hardware.h | 32 ++++ > configs/am62ax_evm_r5_defconfig | 1 + > configs/am62px_evm_r5_defconfig | 1 + > drivers/firmware/ti_sci.c | 38 +++++ > drivers/firmware/ti_sci.h | 14 ++ > drivers/ram/k3-ddrss/k3-ddrss.c | 165 > +++++++++++++++++++++ > dts/upstream/src/arm64/ti/k3-am62-lp-sk.dts | 12 ++ > dts/upstream/src/arm64/ti/k3-am62-phycore-som.dtsi | 1 - > dts/upstream/src/arm64/ti/k3-am625-beagleplay.dts | 1 - > dts/upstream/src/arm64/ti/k3-am62a-main.dtsi | 12 ++ > dts/upstream/src/arm64/ti/k3-am62a-mcu.dtsi | 25 ++++ > .../src/arm64/ti/k3-am62a-phycore-som.dtsi | 1 - > dts/upstream/src/arm64/ti/k3-am62a-wakeup.dtsi | 25 ++++ > dts/upstream/src/arm64/ti/k3-am62a7-sk.dts | 139 ++++++++++++++++- > dts/upstream/src/arm64/ti/k3-am62p5-sk.dts | 51 ++++++- > dts/upstream/src/arm64/ti/k3-am62x-sk-common.dtsi | 35 ++++- > dts/upstream/src/arm64/ti/k3-am642-evm.dts | 1 - > dts/upstream/src/arm64/ti/k3-am654-base-board.dts | 1 - > .../ti/k3-am6548-iot2050-advanced-common.dtsi | 1 - > dts/upstream/src/arm64/ti/k3-am69-sk.dts | 1 - > include/linux/soc/ti/ti_sci_protocol.h | 9 ++ > 29 files changed, 774 insertions(+), 27 deletions(-) > --- > base-commit: 548d997229b7929bd7f0782415952d5a85eb7e64 > change-id: 20250306-topic-am62-ioddr-v2025-04-rc1-0b3a0ffe92b1 > > Best regards, > -- > Markus Schneider-Pargmann <m...@baylibre.com> >
