[PATCH net-next 1/2] dt-bindings: net: pcs: renesas,rzn1-miic: Add renesas,miic-phylink-active-low property
From: Prabhakar
Date: Wed Nov 12 2025 - 15:20:04 EST
From: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
Add the boolean DT property `renesas,miic-phylink-active-low` to the RZN1
MIIC binding schema. This property allows configuring the active level
of the PHY-link signals used by the Switch, EtherCAT, and SERCOS III
interfaces.
The signal polarity is controlled by fields in the MIIC_PHYLINK register:
- SWLNK[3:0]: configures the Switch interface link signal level
0 - Active High
1 - Active Low
- CATLNK[6:4]: configures the EtherCAT interface link signal level
0 - Active Low
1 - Active High
- S3LNK[9:8]: configures the SERCOS III interface link signal level
0 - Active Low
1 - Active High
When the `renesas,miic-phylink-active-low` property is present, the
PHY-link signal is configured as active-low. When omitted, the signal
defaults to active-high.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
---
.../devicetree/bindings/net/pcs/renesas,rzn1-miic.yaml | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/Documentation/devicetree/bindings/net/pcs/renesas,rzn1-miic.yaml b/Documentation/devicetree/bindings/net/pcs/renesas,rzn1-miic.yaml
index 3adbcf56d2be..825ae8a91e8b 100644
--- a/Documentation/devicetree/bindings/net/pcs/renesas,rzn1-miic.yaml
+++ b/Documentation/devicetree/bindings/net/pcs/renesas,rzn1-miic.yaml
@@ -86,6 +86,13 @@ patternProperties:
and include/dt-bindings/net/renesas,r9a09g077-pcs-miic.h for RZ/N2H, RZ/T2H SoCs.
$ref: /schemas/types.yaml#/definitions/uint32
+ renesas,miic-phylink-active-low:
+ type: boolean
+ description: Indicates that the PHY-link signal provided by the Ethernet switch,
+ EtherCAT, or SERCOS3 interface is active low. When present, this property
+ sets the corresponding signal polarity to active low. When omitted, the signal
+ defaults to active high.
+
required:
- reg
- renesas,miic-input
--
2.43.0