linux-kernel - Question on pre running clocks

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Message-ID: <CAKZGPAOurEwCs7B8RAinTEBwWKOEwW=8FLtAKSzLu9LjH9AHvg@mail.gmail.com>
Date:   Fri, 20 Oct 2023 12:37:45 +0530
From:   Arun KS <arunks.linux@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     sboyd@...nel.org, mturquette@...libre.com,
        Arun KS <getarunks@...il.com>
Subject: Question on pre running clocks

Hello,

Lets say there is a clock which is enabled by bootloaders and is pre
running as linux boots.
Is it mandatory for the client drivers to call clk_prepare_enable() on
them to initialise the enable_count to 1?

Or is there a way we can specify to the kernel that this clock is
already enabled by bootloader and initialise the enable_count for this
clock to 1.

Because otherwise, clk_disable() prints a WARN() if a client driver
uses clock handle where clk_prepare_enable() is not called.

I grep through the code, but could find any details. Appreciate any pointers.

Regards,
Arun