[PATCH v10 2/4] dt-bindings: PCI: pci-imx6: Add external reference clock input

[Rob Herring (Arm)]

On Thu, 11 Dec 2025 14:48:19 +0800, Richard Zhu wrote:
> i.MX95 PCIes have two reference clock inputs: one from internal PLL.
> It's wired inside chip and present as "ref" clock. It's not an optional
> clock. The other from off chip crystal oscillator. The "extref" clock
> refers to a reference clock from an external crystal oscillator through
> the CLKIN_N/P pair PADs. It is an optional clock, relied on the board
> design.
> 
> Add additional optional external reference clock input for i.MX95 PCIes.
> 
> Signed-off-by: Richard Zhu <hongxing.zhu at nxp.com>
> Reviewed-by: Frank Li <Frank.Li at nxp.com>
> ---
>  Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
> 

Reviewed-by: Rob Herring (Arm) <robh at kernel.org>