Re: [PATCH 1/3] clk: socfpga: agilex: convert to CLK_OF_DECLARE()

[Brian Masney <bmasney@redhat.com>]

+ Bartosz

Hi Adrian,

On Mon, Sep 21, 2026 at 11:17:13AM +0800, Ng, Adrian Ho Yin wrote:
> subsys_initcall() / subsys_platform_driver() would not fix the failure we
> are hitting. Both still run after time_init(), while the DW APB timer is
> registered via TIMER_OF_DECLARE from timer_probe().
> 
> So moving from core_initcall() to subsys_initcall() changes nothing for
> this consumer: the timer cannot defer, clk_get() still fails, and the timer
> is never brought up. That is why these patches use CLK_OF_DECLARE(): the
> provider must be registered from of_clk_init() so clocks exist before
> TIMER_OF_DECLARE runs.
> 
> On the broader point about CLK_OF_DECLARE abuse: I agree it should not be
> used merely to beat platform device probe. If the preferred approach is to
> keep the clkmgr as a platform driver (subsys_platform_driver()) and give the
> DW APB timer nodes a fixed clock-frequency instead of a clocks phandle, I
> can respin that way. Please let me know which you prefer.

I wanted confirmation that you wanted to use CLK_OF_DECLARE() for the
system timers.

Will you by chance be at Linux Plumbers Conference in two weeks? Bartosz
is leading a discussion about the future of CLK_OF_DECLARE() and
friends.

https://lpc.events/event/20/contributions/2503/

We want to minimize the use of CLK_OF_DECLARE(), so the preference is
to keep this as a platform driver if possible. If you are able to get
around using CLK_OF_DECLARE() by initially running the system timers
with a fixed frequency then I think that would be preferable.

Brian