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

Mathieu Poirier
2026-03-30T14:56:26Z

On Wed, Mar 18, 2026 at 04:13:06PM +0100, Markus Schneider-Pargmann (TI) wrote:
> 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@ti.com
>
> 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@baylibre.com>
> ---
> 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@baylibre.com
>
> 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@baylibre.com
>
> ---
> Markus Schneider-Pargmann (TI) (7):
> dt-bindings: remoteproc: k3-r5f: Split up memory regions
> dt-bindings: remoteproc: k3-r5f: Add memory-region-names

I have picked-up the above two. The .dtsi files need to go through the TI
tree.

Thanks,
Mathieu

> 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@baylibre.com>
>