[PATCH v2 3/7] firmware: raspberrypi: Provide a helper to query a clock max rate

[Stephen Boyd]

Quoting Maxime Ripard (2022-09-20 05:50:22)
> The firmware allows to query for its clocks the operating range of a
> given clock. We'll need this for some drivers (KMS, in particular) to
> infer the state of some configuration options, so let's create a
> function to do so.
> 
> Signed-off-by: Maxime Ripard <maxime at cerno.tech>
> 
Acked-by: Stephen Boyd <sboyd at kernel.org>