[PATCH] arm64: dts: imx8mq: assign PCIe clocks

Shawn Guo shawnguo at kernel.org
Sat May 22 19:45:28 PDT 2021


On Sat, May 08, 2021 at 12:12:13AM +0200, Lucas Stach wrote:
> This fixes multiple issues with the current non-existent PCIe clock setup:
> 
> The controller can run at up to 250MHz, so use a parent that provides this
> clock.
> 
> The PHY needs an exact 100MHz reference clock to function if the PCIe
> refclock is not fed in via the refclock pads. While this mode is not
> supported (yet) in the driver it doesn't hurt to make sure we are
> providing a clock with the right rate.
> 
> The AUX clock is specified to have a maximum clock rate of 10MHz. So
> the current setup, which drives it straight from the 25MHz oscillator is
> actually overclocking the AUX input.
> 
> Signed-off-by: Lucas Stach <l.stach at pengutronix.de>

Applied, thanks.



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