Re: [PATCH v2 2/3] dt-bindings: spi: constrain minItems of clocks and clock-names

William Qiu
2023-07-19T06:40:03Z

On 2023/7/14 19:52, Mark Brown wrote:
> On Fri, Jul 14, 2023 at 03:14:59PM +0800, William Qiu wrote:
>> On 2023/7/13 22:57, Rob Herring wrote:
>
>> > I suspect that PCLK and SSPCLK are tied to the same clock source. There
>> > must be an SSPCLK because that is the one used to clock the SPI bus and
>> > we need to know the frequency of it.
>
>> After communicating with colleagues in SoC FE, I learned that PCLK and
>> SSPCLK were homologous on JH7110. He said that SSPCLK would divide the
>> frequency internally anyway, and there was no need for external part frequency,
>> so he directly gave them together.
>
>> So, should I call this clock ssp_apb or keep it SSPCLK?
>
> I'd expect this to be handled in the DTS for the SoC - connect both
> clocks the binding requires to whatever the upstream clock is, it's not
> clear to me that any binding change is required.

You mean binding two clocks, with the same clock source? Then there is no
need to modify YAML.

Best regards,
William