[PATCH] dt-bindings: rtc: zynqmp: Describe power-domains property

[Michal Simek]

On 2/19/24 14:19, Krzysztof Kozlowski wrote:
> On 19/02/2024 14:11, Michal Simek wrote:
>>
>>
>> On 2/17/24 09:26, Krzysztof Kozlowski wrote:
>>> On 16/02/2024 10:42, Michal Simek wrote:
>>>>
>>>>
>>>> On 2/16/24 10:19, Krzysztof Kozlowski wrote:
>>>>> On 16/02/2024 09:51, Michal Simek wrote:
>>>>>> RTC has its own power domain on Xilinx Versal SOC that's why describe it as
>>>>>> optional property.
>>>>>>
>>>>>> Signed-off-by: Michal Simek <michal.simek at amd.com>
>>>>>> ---
>>>>>>
>>>>>>     Documentation/devicetree/bindings/rtc/xlnx,zynqmp-rtc.yaml | 3 +++
>>>>>>     1 file changed, 3 insertions(+)
>>>>>>
>>>>>
>>>>> But Versal is not described in this binding, is it? I see only one
>>>>> compatible.
>>>>
>>>> It is the same IP only as is on zynqmp with own power rail.
>>>
>>> Then you should have separate compatible, because they are not
>>> identical. It would also allow you to narrow the domains to versal and
>>> also require it (on versal).
>>
>> I can double check with HW guys but I am quite sure IP itself is exactly the
>> same. What it is different is that there is own power domain to it (not shared
>> one as is in zynqmp case).
> 
> What does it mean shared one? If several devices share power domain,
> then they all should have power-domains property.

Shared one means that the same power domain is shared with other IPs or simply 
enabled by default without any option to disable it.

Thanks,
Michal