>> 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: Mika Westerberg <mika.westerb...@linux.intel.com>
>> Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpa...@amd.com>
>> Tested-by: Loc Ho <l...@apm.com>
>> ---
>> Note: This has been tested on AMD Seattle RevB for both DT and ACPI.
>> Changes from V3 (https://lkml.org/lkml/2015/12/22/596):
>>     * Add i2c_dw_plat_prepare_clk() per Andy's suggestion
>>     * Add tested-by Loc Ho.
> The changes from V3 are big enough that I'd appreciate a new Tested-by
> tag.

Will let you know when I have moment to give this a try on X-Gene.

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