Re: [PATCH v1 1/2] dt-bindings: soc: samsung: usi: allow 64-bit address space

[Ivaylo Ivanov <ivo.ivanov.ivanov1@gmail.com>]

On 7/24/25 09:56, Krzysztof Kozlowski wrote:
> On 23/07/2025 10:21, Ivaylo Ivanov wrote:
>> On 7/23/25 11:15, Krzysztof Kozlowski wrote:
>>> On Tue, Jul 22, 2025 at 03:10:36PM +0300, Ivaylo Ivanov wrote:
>>>> Some device trees, like the exynos2200 one, configure the root node
>>>> with #address-cells and #size-cells set to 2. However, the usi binding
>>>> expects 32 bit address space only. Allow these determining properties to
>>> So if USI expects 32 bit, then why do we allow 64?
>>>
>>> Switching this to 2 means you use 64-bit addressing for children
>> I don't, but the main point was to avoid defining ranges for every single usi
> I do not understand your "I don't", because you do.

I meant it in the "I don't _need_ to explicitly use that, but it's _nice_ to have"
way, so I don't have to clutter the nodes with address translations in ranges.

Best regards,
Ivaylo

>  You change the child
> address space to 64 bit and switch to 36/64 bit DMA. That's the meaning
> of address cells 2.
>
>
> Best regards,
> Krzysztof