[PATCH v3 0/7] arm64: dts: ti: k3-am62a7-sk: Split r5f memory region

[Markus Schneider-Pargmann (TI)]

Hi,

Split the firmware memory region in more specific parts so it is better
described where which information is stored. Specifically the LPM metadata
region is important as bootloader software like U-Boot has to know where
that data is to be able to read that data and resume from RAM.

IO+DDR is a deep sleep state in which a few pins are set to be sensitive
for wakeup while the DDR is kept in self refresh. Everything else is
powered off.

The changes in this series were suggested as part of the IO+DDR u-boot series:
  https://lore.kernel.org/r/814c211f-a9eb-4311-bb84-165b1a69755f@xxxxxx

There are currently no real users of the memory-region that is split in
this series. The size of the memory-region in total stays the same.
The new layout is derived from the software running on the r5f
processor:
  https://github.com/TexasInstruments/mcupsdk-core-k3/blob/k3_main/examples/drivers/ipc/ipc_rpmsg_echo_linux/am62ax-sk/r5fss0-0_freertos/ti-arm-clang/linker.cmd#L172
  https://github.com/TexasInstruments/mcupsdk-core-k3/blob/k3_main/source/drivers/device_manager/sciclient.h#L459

Additionally the two important devicetree nodes for resuming from IO+DDR
have the bootph-pre-ram flag added as this data needs to be read before
the RAM is in use.

Best
Markus

Signed-off-by: Markus Schneider-Pargmann (TI) <msp@xxxxxxxxxxxx>
---
Changes in v3:
- Squash the enforcement of the memory-region-names requirement in the
  patch adding the memory-region-names, as suggested.
- Link to v2: https://lore.kernel.org/r/20260312-topic-am62a-ioddr-dt-v6-19-v2-0-37cb7ceec658@xxxxxxxxxxxx

Changes in v2:
- Make memory-region-names required if memory-region is present
- Fixup memory-region and memory-region-names conditions. Require either
  2 or 6 regions for memory-region and memory-region-names
- Reword and restructure the binding documentation for memory-region and
  memory-region-names
- Add memory-region-names to all uses of memory-region
- Link to v1: https://lore.kernel.org/r/20260303-topic-am62a-ioddr-dt-v6-19-v1-0-12fe72bb40d2@xxxxxxxxxxxx

---
Markus Schneider-Pargmann (TI) (7):
      dt-bindings: remoteproc: k3-r5f: Split up memory regions
      dt-bindings: remoteproc: k3-r5f: Add memory-region-names
      arm64: dts: ti: k3: Use memory-region-names for r5f
      arm64: dts: ti: k3-am62a7-sk: Split r5f memory region
      arm64: dts: ti: k3-am62p5-sk: Split r5f memory region
      arm64: dts: ti: k3-am62a7-sk: Add r5f nodes to pre-ram bootphase
      arm64: dts: ti: k3-am62p5-sk: Add r5f nodes to pre-ram bootphase

 .../bindings/remoteproc/ti,k3-r5f-rproc.yaml       | 55 ++++++++++++++++++----
 .../arm64/boot/dts/ti/k3-am62-ti-ipc-firmware.dtsi |  1 +
 .../boot/dts/ti/k3-am62a-ti-ipc-firmware.dtsi      |  2 +
 arch/arm64/boot/dts/ti/k3-am62a7-sk.dts            | 42 ++++++++++++++++-
 .../boot/dts/ti/k3-am62p-ti-ipc-firmware.dtsi      |  2 +
 arch/arm64/boot/dts/ti/k3-am62p5-sk.dts            | 42 ++++++++++++++++-
 .../arm64/boot/dts/ti/k3-am64-ti-ipc-firmware.dtsi |  4 ++
 .../arm64/boot/dts/ti/k3-am65-ti-ipc-firmware.dtsi |  2 +
 .../boot/dts/ti/k3-j7200-ti-ipc-firmware.dtsi      |  4 ++
 .../boot/dts/ti/k3-j721e-ti-ipc-firmware.dtsi      |  6 +++
 .../boot/dts/ti/k3-j721s2-ti-ipc-firmware.dtsi     |  6 +++
 .../boot/dts/ti/k3-j722s-ti-ipc-firmware.dtsi      |  3 ++
 .../k3-j784s4-j742s2-ti-ipc-firmware-common.dtsi   |  8 ++++
 13 files changed, 163 insertions(+), 14 deletions(-)
---
base-commit: 6de23f81a5e08be8fbf5e8d7e9febc72a5b5f27f
change-id: 20260210-topic-am62a-ioddr-dt-v6-19-0da7712081d7

Best regards,
-- 
Markus Schneider-Pargmann (TI) <msp@xxxxxxxxxxxx>