Sudeep Holla 8410e7f3b3 cpufreq: scmi: Fix OPP addition failure with a dummy clock provider
Commit dd461cd918 ("opp: Allow dev_pm_opp_get_opp_table() to return
-EPROBE_DEFER") handles -EPROBE_DEFER for the clock/interconnects within
_allocate_opp_table() which is called from dev_pm_opp_add and it
now propagates the error back to the caller.

SCMI performance domain re-used clock bindings to keep it simple. However
with the above mentioned change, if clock property is present in a device
node, opps fails to get added with below errors until clk_get succeeds.

 cpu0: failed to add opp 450000000Hz
 cpu0: failed to add opps to the device
 ....(errors on cpu1-cpu4)
 cpu5: failed to add opp 450000000Hz
 cpu5: failed to add opps to the device

So, in order to fix the issue, we need to register dummy clock provider.
With the dummy clock provider, clk_get returns NULL(no errors!), then opp
core proceeds to add OPPs for the CPUs.

Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Fixes: dd461cd918 ("opp: Allow dev_pm_opp_get_opp_table() to return -EPROBE_DEFER")
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2020-11-17 10:04:28 +05:30
2020-10-25 15:14:11 -07:00

Linux kernel
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