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arm64: dts: pfc-750-8xxx: fix M4F DMA region overlap with IPC shmem

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The mcu_m4fss_dma_memory_region (0x9cb00000, size 0x100000) overlapped
with uboot_ipc_shm (0x9cbff000, size 0x1000): the IPC window occupies
exactly the last 4 KiB of the DMA region, triggering:

  OF: reserved mem: OVERLAP DETECTED!
    m4f-dma-memory@9cb00000 overlaps with uboot-ipc-shm@9cbff000

Shrink the DMA region size from 0x100000 to 0xff000, leaving the
last 4 KiB (0x9cbff000–0x9cc00000) exclusively for the U-Boot IPC
sidecar shared-memory window.

Reported-by: Oleg Karfich <oleg.karfich@wago.com>
Signed-off-by: Heinrich Toews <ht@twx-software.de>
This commit is contained in:
Heinrich Toews
2026-06-18 18:06:18 +02:00
parent 869a9bb515
commit ea18e83e94
1 changed files with 1 additions and 1 deletions
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arch/arm64/boot/dts/ti/k3-am623-pfc-750-8xxx-common.dtsi
+1 -1
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@@ -123,7 +123,7 @@
mcu_m4fss_dma_memory_region: m4f-dma-memory@9cb00000 {
compatible = "shared-dma-pool";
reg = <0x00 0x9cb00000 0x00 0x100000>;
reg = <0x00 0x9cb00000 0x00 0xff000>;
no-map;
};