Re: [PATCH v2] i2c: designware: Do not require clock when SSCN and FFCN are provided

[Loc Ho]

Hi,

> The current driver uses input clock source frequency to calculate
> values for [SS|FS]_[HC|LC] registers. However, when booting ACPI, we do not
> currently have a good way to provide the frequency information.
> Instead, we can leverage the SSCN and FFCN ACPI methods, which can be used
> to directly provide these values. So, the clock information should
> no longer be required during probing.
>
> However, since clk can be invalid, additional checks must be done where
> we are making use of it.
>
> Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@xxxxxxx>
> ---
>
> Note: This has been tested on AMD Seattle RevB for both DT and ACPI.

Tested on X-Gene hardware also.

-Loc
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