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Message-ID: <f59d6389-1c7b-45f9-8b85-274dbbeb775a@linaro.org>
Date: Tue, 19 Mar 2024 06:28:59 +0100
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Subject: Re: [PATCH v13 2/4] dt-bindings: remoteproc: add Tightly Coupled
 Memory (TCM) bindings
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From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
To: Tanmay Shah <tanmay.shah@amd.com>, andersson@kernel.org,
 mathieu.poirier@linaro.org, robh+dt@kernel.org,
 krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org,
 michal.simek@amd.com, ben.levinsky@amd.com
Cc: linux-remoteproc@vger.kernel.org, devicetree@vger.kernel.org,
 linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
 Radhey Shyam Pandey <radhey.shyam.pandey@amd.com>
References: <20240311175926.1625180-1-tanmay.shah@amd.com>
 <20240311175926.1625180-3-tanmay.shah@amd.com>
 <d498d76e-b021-4cf7-adca-63f1cd3e1542@linaro.org>
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In-Reply-To: <d498d76e-b021-4cf7-adca-63f1cd3e1542@linaro.org>
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On 12/03/2024 13:13, Krzysztof Kozlowski wrote:
> On 11/03/2024 18:59, 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>
>> ---
>>
>> 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 <krzysztof.kozlowski@linaro.org>

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