linux-kernel - [PATCH 1/2] dt-bindings: net: phy: Support external PHY xtal

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Date:   Wed, 31 May 2023 11:03:39 -0400
From:   Detlev Casanova <detlev.casanova@...labora.com>
To:     linux-kernel@...r.kernel.org
Cc:     Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        Detlev Casanova <detlev.casanova@...labora.com>
Subject: [PATCH 1/2] dt-bindings: net: phy: Support external PHY xtal

Ethernet PHYs can have external an clock that needs to be activated before
probing the PHY.

Signed-off-by: Detlev Casanova <detlev.casanova@...labora.com>
---
 .../devicetree/bindings/net/ethernet-phy.yaml          | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/ethernet-phy.yaml b/Documentation/devicetree/bindings/net/ethernet-phy.yaml
index 4f574532ee13..e83a33c2aa59 100644
--- a/Documentation/devicetree/bindings/net/ethernet-phy.yaml
+++ b/Documentation/devicetree/bindings/net/ethernet-phy.yaml
@@ -93,6 +93,16 @@ properties:
       the turn around line low at end of the control phase of the
       MDIO transaction.
 
+  clock-names:
+    items:
+      - const: xtal
+
+  clocks:
+    maxItems: 1
+    description:
+      External clock connected to the PHY. If not specified it is assumed
+      that the PHY uses a fixed crystal or an internal oscillator.
+
   enet-phy-lane-swap:
     $ref: /schemas/types.yaml#/definitions/flag
     description:
-- 
2.39.3