linux-kernel - [net-next PATCH 1/2] dt-bindings: net: macb: Add mdio bus child node

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Message-Id: <20211022163548.3380625-1-sean.anderson@seco.com>
Date:   Fri, 22 Oct 2021 12:35:47 -0400
From:   Sean Anderson <sean.anderson@...o.com>
To:     netdev@...r.kernel.org,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Claudiu Beznea <claudiu.beznea@...rochip.com>
Cc:     Jakub Kicinski <kuba@...nel.org>,
        "David S . Miller" <davem@...emloft.net>,
        linux-kernel@...r.kernel.org,
        Sean Anderson <sean.anderson@...o.com>,
        Rob Herring <robh@...nel.org>, devicetree@...r.kernel.org
Subject: [net-next PATCH 1/2] dt-bindings: net: macb: Add mdio bus child node

This adds an optional mdio bus child node. If present, the mac will
look for PHYs there instead of directly under the top-level node. This
eliminates any ambiguity about whether child nodes are PHYs, and allows
the MDIO bus to contain non-PHY devices.

Signed-off-by: Sean Anderson <sean.anderson@...o.com>
---

 Documentation/devicetree/bindings/net/macb.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/macb.txt b/Documentation/devicetree/bindings/net/macb.txt
index af9df2f01a1c..a1b06fd1962e 100644
--- a/Documentation/devicetree/bindings/net/macb.txt
+++ b/Documentation/devicetree/bindings/net/macb.txt
@@ -30,6 +30,10 @@ Required properties:
 	Optional elements: 'tsu_clk'
 - clocks: Phandles to input clocks.
 
+Optional properties:
+- mdio: node containing PHY children. If this node is not present, then PHYs
+        will be direct children.
+
 The MAC address will be determined using the optional properties
 defined in ethernet.txt.
 
-- 
2.25.1