Re: [PATCH v2 3/4] phy: fsl-imx8mq-usb: support alternate reference clock

On Mon, Oct 13, 2025 at 07:58:12AM +0200, Alexander Stein wrote:

Am Freitag, 10. Oktober 2025, 13:01:12 CEST schrieb Xu Yang:

quoted

This phy supports both 24MHz and 100MHz clock inputs. By default it's
using XTAL 24MHz and the 100MHz clock is a alternate reference clock.
Add supports to use alternate reference clock in case 24MHz clock
can't work well.

This driver supports imx8mx and imx8mp as well. Do these SoC also support
the alternative clock?

imx8mp support the alternative clock too. Note that for imx8mp,
GPR_REG0.USB_PHY_REF_CLK_SEL needs also to be set if alternative clock is
necessary. However, it's not implemented for now. 

Thanks,
Xu Yang

Best regards
Alexander