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.
Signed-off-by: Richard Zhu <hongxing.zhu@xxxxxxx>
Reviewed-by: Frank Li <Frank.Li@xxxxxxx>
---
Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml
index ca5f2970f217..a45876aba4da 100644
--- a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml
+++ b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml
@@ -219,7 +219,12 @@ allOf:
- const: pcie_bus
- const: pcie_phy
- const: pcie_aux
- - const: ref
+ - description: PCIe reference clock.
+ oneOf:
+ - description: The controller might be configured clocking
+ coming in from either an internal system PLL or an
+ external clock source.
+ enum: [ref, extref]
unevaluatedProperties: false
--
2.37.1
