[PATCH v2 0/2] arm64: dts: freescale: Re-enable A72 cluster on i.MX8QM boards

[Peng Fan (OSS)]

The ERR050104 cache coherency workaround for the NXP i.MX8QuadMax and
i.MX8QuadPlus SoCs has been merged upstream as commit d44e08dab27d
("arm64: errata: Add NXP i.MX8QM/8QP workaround for A53 cache coherency
issue").

The workaround addresses a hardware defect where the upper address bits
of the ARADDR and ACADDR buses within the Cortex-A53 subsystem were
incorrectly connected, causing TLBI and IC maintenance operations
exchanged between the A53 and A72 clusters to be corrupted.

Before the software workaround was available, affected board DTS files
worked around this at the DT level by removing the Cortex-A72 CPU nodes
(cpu@100, cpu@101), the cpu-map topology, and associated cpu1-thermal
zones, effectively running the SoC as a single A53-only cluster.

With the kernel-side fix now in place, this series removes the DT-level
workarounds and restores full SMP support with both A53 and A72 clusters.
The PMIC thermal cooling-device maps are also updated to include A72_0
and A72_1 so both clusters participate in thermal management.

Signed-off-by: Peng Fan <peng.fan@xxxxxxx>
---
Changes in v2:
- patch 1: update PMIC thermal cooling-device map to include A72_0/A72_1
- patch 2: replace manual DT node deletion removal with a proper revert
  of commit 5d20f1ccb339 ("arm64: dts: imx8qm-tqma8qm-mba8x: Disable
  Cortex-A72 cluster"), which also restores the cpu1-thermal zone in
  imx8qm-tqma8qm-mba8x.dts as originally intended
- Link to v1: https://patch.msgid.link/20261022-8qm-v1-0-2a597cb3debd@xxxxxxx

---
Peng Fan (2):
      arm64: dts: imx8qm-mek: Re-enable A72 cluster after ERR050104 workaround
      Revert "arm64: dts: imx8qm-tqma8qm-mba8x: Disable Cortex-A72 cluster"

 arch/arm64/boot/dts/freescale/imx8qm-mek.dts       | 14 ++------
 .../boot/dts/freescale/imx8qm-tqma8qm-mba8x.dts    | 39 ++++++++++++++++++++++
 arch/arm64/boot/dts/freescale/imx8qm-tqma8qm.dtsi  | 13 ++------
 3 files changed, 45 insertions(+), 21 deletions(-)
---
base-commit: 4403278e4ea2f654f8130a5c03eb8b4516a0f201
change-id: 20261022-8qm-875d0b4b3e7d

Best regards,
--  
Peng Fan <peng.fan@xxxxxxx>