[v2] PCI: imx6: Add external reference clock mode support

[PATCH v2 1/2] dt-binding: pci-imx6: Add external reference clock mode support

Posted by Richard Zhu 3 months, 3 weeks ago

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@nxp.com>
---
 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..c472a5daae6e 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, gio]
 
 unevaluatedProperties: false
 
-- 
2.37.1

Re: [PATCH v2 1/2] dt-binding: pci-imx6: Add external reference clock mode support

Posted by Frank Li 3 months, 3 weeks ago

On Thu, Jun 19, 2025 at 05:10:03PM +0800, Richard Zhu wrote:
> 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@nxp.com>

Reviewed-by: Frank Li <Frank.Li@nxp.com>

> ---
>  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..c472a5daae6e 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, gio]
>
>  unevaluatedProperties: false
>
> --
> 2.37.1
>

[PATCH v2 1/2] dt-binding: pci-imx6: Add external reference clock mode support
[PATCH v2 2/2] PCI: imx6: Add external reference clock mode support