Re: [PATCH v13 2/4] dt-bindings: remoteproc: add Tightly Coupled Memory (TCM) bindings

On 12/03/2024 13:13, Krzysztof Kozlowski wrote:

On 11/03/2024 18:59, Tanmay Shah wrote:

quoted

From: Radhey Shyam Pandey <radhey.shyam.pandey@amd.com>

Introduce bindings for TCM memory address space on AMD-xilinx Zynq
UltraScale+ platform. It will help in defining TCM in device-tree
and make it's access platform agnostic and data-driven.

Tightly-coupled memories(TCMs) are low-latency memory that provides
predictable instruction execution and predictable data load/store
timing. Each Cortex-R5F processor contains two 64-bit wide 64 KB memory
banks on the ATCM and BTCM ports, for a total of 128 KB of memory.

The TCM resources(reg, reg-names and power-domain) are documented for
each TCM in the R5 node. The reg and reg-names are made as required
properties as we don't want to hardcode TCM addresses for future
platforms and for zu+ legacy implementation will ensure that the
old dts w/o reg/reg-names works and stable ABI is maintained.

It also extends the examples for TCM split and lockstep modes.

Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@amd.com>
Signed-off-by: Tanmay Shah <redacted>
---

Changes in v13:
  - Have power-domains property for lockstep case instead of
    keeping it flexible.
  - Add "items:" list in power-domains property

Reviewed-by: Krzysztof Kozlowski <redacted>

And unreviewed. It turns out you now mix devices and bring incompatible
programming models under one compatible. And this leads to problems in
your further patches.

NAK.

Best regards,
Krzysztof


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