[PATCH net-next v4 1/3] dt-bindings: net: fec: add pps channel property

[Francesco Dolcini <francesco@dolcini.it>]

From: Francesco Dolcini <francesco.dolcini@toradex.com>

Add fsl,pps-channel property to select where to connect the PPS signal.
This depends on the internal SoC routing and on the board, for example
on the i.MX8 SoC it can be connected to an external pin (using channel 1)
or to internal eDMA as DMA request (channel 0).

Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
---
v4: improve commit message and explain why this is needed, as requested by
    Conor Dooley.
v3: no changes
v2: no changes
---
 Documentation/devicetree/bindings/net/fsl,fec.yaml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/fsl,fec.yaml b/Documentation/devicetree/bindings/net/fsl,fec.yaml
index 5536c06139ca..24e863fdbdab 100644
--- a/Documentation/devicetree/bindings/net/fsl,fec.yaml
+++ b/Documentation/devicetree/bindings/net/fsl,fec.yaml
@@ -183,6 +183,13 @@ properties:
     description:
       Register bits of stop mode control, the format is <&gpr req_gpr req_bit>.
 
+  fsl,pps-channel:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    default: 0
+    description:
+      Specifies to which timer instance the PPS signal is routed.
+    enum: [0, 1, 2, 3]
+
   mdio:
     $ref: mdio.yaml#
     unevaluatedProperties: false
-- 
2.39.5