Re: [PATCH] serial: ns16550: Try get serial clock rate from DT before CLK

Hi Jonas,

On 8/4/24 5:09 PM, Jonas Karlman wrote:

Initializing a clock driver to read a known static clock rate can take some time at U-Boot proper pre-reloc phase.

Change to first try and read clock rate from DT to speed up boot time, fall back to getting the clock rate from clock driver.

This help reduce boot time by around:

• ~35ms on a Radxa ROCK Pi 4 (RK3399)
• ~15ms on a Radxa ZERO 3W (RK3566)

Time that is wasted getting a static rate known at compile time.

I guess this also makes some board perform worse as well, the ones without a clock-frequency set?

The change seems sound to me, therefore Reviewed-by: Quentin Schulz quentin.schulz@cherry.de

Thanks! Quentin