Re: [PATCH v14 2/4] dt-bindings: remoteproc: add Tightly Coupled Memory (TCM) bindings

Krzysztof Kozlowski
2024-04-09T07:29:56Z

On 08/04/2024 22:53, Tanmay Shah wrote:
> 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 <tanmay.shah@amd.com>

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Best regards,
Krzysztof