linux-kernel - [PATCH 2/2] dt-bindings: net: dwmac: document 'mac-mode' property

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Message-ID: <20190906130256.10321-2-alexandru.ardelean@analog.com>
Date:   Fri, 6 Sep 2019 16:02:56 +0300
From:   Alexandru Ardelean <alexandru.ardelean@...log.com>
To:     <netdev@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
CC:     <davem@...emloft.net>, <robh+dt@...nel.org>,
        <peppe.cavallaro@...com>, <alexandre.torgue@...com>,
        <--cc=andrew@...n.ch>,
        Alexandru Ardelean <alexandru.ardelean@...log.com>
Subject: [PATCH 2/2] dt-bindings: net: dwmac: document 'mac-mode' property

This change documents the 'mac-mode' property that was introduced in the
'stmmac' driver to support passive mode converters that can sit in-between
the MAC & PHY.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@...log.com>
---
 Documentation/devicetree/bindings/net/snps,dwmac.yaml | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/snps,dwmac.yaml b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
index c78be15704b9..ebe4537a7cce 100644
--- a/Documentation/devicetree/bindings/net/snps,dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
@@ -112,6 +112,14 @@ properties:
   reset-names:
     const: stmmaceth
 
+  mac-mode:
+    maxItems: 1
+    description:
+      The property is identical to 'phy-mode', and assumes that there is mode
+      converter in-between the MAC & PHY (e.g. GMII-to-RGMII). This converter
+      can be passive (no SW requirement), and requires that the MAC operate
+      in a different mode than the PHY in order to function.
+
   snps,axi-config:
     $ref: /schemas/types.yaml#definitions/phandle
     description:
-- 
2.20.1