[PATCH v2 0/1] dts: ti: k3-j7: Reserve memory for LPM metadata

[Richard Genoud (TI)]

At boot, U-Boot will copy ATF/OPTEE certificates and DM into a LPM memory
region.
Passing it to TIFS with TISCI_MSG_LPM_SAVE_ADDR
https://software-dl.ti.com/tisci/esd/latest/2_tisci_msgs/pm/lpm.html#lpm-msg-lpm-save-addr
Before suspend, TIFS will save and encrypt TFA context and its own minimal
context.
At resume, U-Boot will tell TIFS to restore and decrypt data from this
memory region.

So, U-Boot needs to parse the device tree, looking for
"/reserved_memory/lpm-memory"
Moreover, from reserved-memory.yaml:
  Following the generic-names recommended practice, node names should
  reflect the purpose of the node (ie. "framebuffer" or "dma-pool").
So @lpm-memory seems to reflect the purpose.

Changes since v1:
- add specific lpm region for j742s2 and j784s4 instead of the common
  one since the addresses are not the same.
- add j721s2 lpm_memory_region
- change j722s addresse to prevent holes
- link to v1: https://lore.kernel.org/lkml/20260312113446.1857592-1-p-mantena@ti.com/

Prasanth Babu Mantena (1):
  arm64: dts: ti: k3-j7: Reserve memory for LPM meta data

 arch/arm64/boot/dts/ti/k3-j7200-som-p0.dtsi  | 6 ++++++
 arch/arm64/boot/dts/ti/k3-j721s2-som-p0.dtsi | 6 ++++++
 arch/arm64/boot/dts/ti/k3-j722s-evm.dts      | 6 ++++++
 arch/arm64/boot/dts/ti/k3-j742s2-evm.dts     | 9 +++++++++
 arch/arm64/boot/dts/ti/k3-j784s4-evm.dts     | 9 ++++++---
 5 files changed, 33 insertions(+), 3 deletions(-)


base-commit: 254f49634ee16a731174d2ae34bc50bd5f45e731