[PATCH net-next 1/9] dt-bindings: net: ti,dp83867: add supply properties

[Mohd Ayaan Anwar <mohd.anwar@oss.qualcomm.com>]

The DP83867 PHY has four distinct power supplies:

  VDDA2P5 -- 2.5V analog supply
  VDD1P0  -- 1.0V digital supply
  VDDA1P8 -- 1.8V analog supply
  VDDIO   -- I/O supply, which can be 3.3V or 2.5V or 1.8V

The DP83867E/IS/CS datasheet (section 8.3) describes two power supply
configurations - "two-supply" and "three-supply".

  1. Two-Supply Configuration: VDDA2P5 and VDD1P0 connected, and the
     VDDA1P8 pins are left unconnected.
  2. Three-Supply Configuration: VDDA2P5, VDD1P0 and VDDA1P8 are all
     connected.

VDDIO is a separate fourth supply present in both configurations. The
datasheet specifies that it can either be 1.8V or 2.5V or 3.3V.

Some embedded board design expose a GPIO-controlled regulator to control
any one or more of these supplies. Therefore, document all four of the
available supply properties.

Signed-off-by: Mohd Ayaan Anwar <mohd.anwar@oss.qualcomm.com>
---
 Documentation/devicetree/bindings/net/ti,dp83867.yaml | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/ti,dp83867.yaml b/Documentation/devicetree/bindings/net/ti,dp83867.yaml
index 4bc1f98fd9fe51260b767b0a1b8b7eaf974a9af9..e78f08ded3d0d449ab75bf33d814fd49587f8387 100644
--- a/Documentation/devicetree/bindings/net/ti,dp83867.yaml
+++ b/Documentation/devicetree/bindings/net/ti,dp83867.yaml
@@ -118,6 +118,20 @@ properties:
       Transmitt FIFO depth- see dt-bindings/net/ti-dp83867.h for applicable
       values.
 
+  vdda-2p5-supply:
+    description: 2.5V analog supply (connected to the VDDA2P5 pins).
+
+  vdd-1p0-supply:
+    description: 1.0V digital core supply (connected to the VDD1P0 pins).
+
+  vdda-1p8-supply:
+    description: 1.8V analog supply (connected to the VDDA1P8 pins).
+
+  vddio-supply:
+    description: |
+      I/O supply (connected to the VDDIO pins). The supply can be 1.8V,
+      2.5V or 3.3V.
+
 required:
   - reg
 

-- 
2.34.1