[PATCH v7 1/6] i2c: xiic: skip input clock setup on non-OF systems
Andy Shevchenko
andriy.shevchenko at intel.com
Sat Jan 31 02:12:56 PST 2026
On Thu, Jan 29, 2026 at 03:29:45PM -0800, Abdurrahman Hussain wrote:
> > On Jan 29, 2026, at 2:43 PM, Andrew Lunn <andrew at lunn.ch> wrote:
> > On Thu, Jan 29, 2026 at 09:43:13PM +0000, Abdurrahman Hussain via B4 Relay wrote:
> >> The xiic driver supports operation without explicit clock configuration
> >> when clocks cannot be specified via firmware, such as on ACPI-based
> >> systems.
> >
> > Are you saying it is technically impossible to specify a clock in
> > ACPI?
> >
> > Maybe a more accurate would be:
> >
> > The xiic driver supports operation without explicit clock
> > configuration when the clocks are not specified via firmware, such as
> > when the ACPI tables are missing the description of the clocks.
>
> Actually, ACPI (since 6.5) added a ClockInput() macro that can be added to
> _CRS of a device node. The ACPI subsystem in kernel could parse these and
> convert into proper clocks integrated with the CCF. But, AFAIK, this idea was
> rejected in the past.
Rejected by which side? CCF?
Because specification still has that.
--
With Best Regards,
Andy Shevchenko
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