On i.MX, the PCIe reference clock might come from either internal system PLL or external clock source. Add the external reference clock source for reference clock. Main change in v2: - Fix yamllint warning. - Refine the driver codes. [PATCH v2 1/2] dt-binding: pci-imx6: Add external reference clock [PATCH v2 2/2] PCI: imx6: Add external reference clock mode support Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml | 7 ++++++- drivers/pci/controller/dwc/pci-imx6.c | 22 +++++++++++++++------- 2 files changed, 21 insertions(+), 8 deletions(-)
