"Govindraj.R" [off-list ref] writes:

Omap-uart can be used as console uart to print early boot
messages using earlyprintk so for console uart prevent
hwmod reset or idling during bootup.

Identify the console_uart set the id and use the custom
pm_latency ops for console uart for the first time
to idle console uart left enabled from bootup and then enable
them back and reset pm_latency ops to default ops.

Thanks to Kevin Hilman [off-list ref] for suggesting
this approach.

You're welcome, but Rajendra's solution is much better. ;)

Can you updated your branch without these custom hooks and using
Rajendra's INIT_NO_IDLE change to the hwmod core.

Kevin