iMX8M Mini Use PI6CFGL201BZDIEX as PCIe REF_CLK

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iMX8M Mini Use PI6CFGL201BZDIEX as PCIe REF_CLK

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zarcen
Contributor I

Hi,

Following reference design, we are making custom board with iMX8M Mini but replace the default PCIe clock generator (9FGV0241AKLF) with PI6CFGL201BZDIEX.

Also, a related post https://community.nxp.com/t5/i-MX-Processors/iMX8M-Mini-CLK-Generator-Clocking-Issue/m-p/1258056 indicates that PI6CFGL201BZDIEX can be used.

However, when it is replaced with PI6CFGL201BZDIEX, the driver (imx6q-pcie) will panic after reporting "PLL lock timeout". Then, kernel gets stuck and just hangs.

[ 2.677860] imx6q-pcie 33800000.pcie: EXT REF_CLK is used!.
[ 2.734722] imx6q-pcie 33800000.pcie: PCIe PLL lock timeout

 

Is there any driver change needed for the driver (drivers/pci/controller/dwc/pci-imx6.c )? Or, we need to change the DTS because of the replacement?

 

Thanks,

Weichen

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