Re: [PATCH v9 07/22] clk: Add API to get index of the clock parent

[Dmitry Osipenko]

07.11.2019 02:10, Stephen Boyd ÐÐÑÐÑ:
> Quoting Sowjanya Komatineni (2019-08-16 12:41:52)
>> This patch adds an API clk_hw_get_parent_index to get index of the
>> clock parent to use during the clock restore operations on system
>> resume.
>  
> Is there a reason we can't save the clk hw index at suspend time by
> reading the hardware to understand the current parent? The parent index
> typically doesn't matter unless we're trying to communicate something
> from the framework to the provider driver. Put another way, I would
> think the provider driver can figure out the index itself without having
> to go through the framework to do so.

Isn't it a bit wasteful to duplicate information about the parent within
a provider if framework already has that info? The whole point of this
new API is to allow providers to avoid that unnecessary duplication.

Please note that clk_hw_get_parent_index is getting used only at the
resume time and not at suspend.

[snip]