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[RFC,net-next,v2,1/2] dt-bindings: net: dsa: microchip: Update ksz device tree bindings for drive strength

Message ID 20230906105904.1477021-2-o.rempel@pengutronix.de
State New
Headers show
Series [RFC,net-next,v2,1/2] dt-bindings: net: dsa: microchip: Update ksz device tree bindings for drive strength | expand

Commit Message

Oleksij Rempel Sept. 6, 2023, 10:59 a.m. UTC 
Extend device tree bindings to support drive strength configuration for the
ksz* switches. Introduced properties:
- microchip,hi-drive-strength-microamp: Controls the drive strength for
  high-speed interfaces like GMII/RGMII and more.
- microchip,lo-drive-strength-microamp: Governs the drive strength for
  low-speed interfaces such as LEDs, PME_N, and others.
- microchip,io-drive-strength-microamp: Controls the drive strength for
  for undocumented Pads on KSZ88xx variants.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
---
 .../bindings/net/dsa/microchip,ksz.yaml       | 23 +++++++++++++++++++
 1 file changed, 23 insertions(+)
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml b/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml
index e51be1ac03623..66bd770839d50 100644
--- a/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml
+++ b/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml
@@ -49,6 +49,29 @@  properties:
       Set if the output SYNCLKO clock should be disabled. Do not mix with
       microchip,synclko-125.
 
+  microchip,io-drive-strength-microamp:
+    description:
+      IO Pad Drive Strength
+    minimum: 8000
+    maximum: 16000
+    default: 16000
+
+  microchip,hi-drive-strength-microamp:
+    description:
+      High Speed Drive Strength. Controls drive strength of GMII / RGMII /
+      MII / RMII (except TX_CLK/REFCLKI, COL and CRS) and CLKO_25_125 lines.
+    minimum: 2000
+    maximum: 28000
+    default: 24000
+
+  microchip,lo-drive-strength-microamp:
+    description:
+      Low Speed Drive Strength. Controls drive strength of TX_CLK / REFCLKI,
+      COL, CRS, LEDs, PME_N, NTRP_N, SDO and SDI/SDA/MDIO lines.
+    minimum: 2000
+    maximum: 28000
+    default: 8000
+
 required:
   - compatible
   - reg