linux-kernel - [PATCH net 1/2] dt: ar803x: Document disable-hibernation property

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Message-Id: <20220812145009.1229094-2-wei.fang@nxp.com>
Date:   Sat, 13 Aug 2022 00:50:08 +1000
From:   wei.fang@....com
To:     andrew@...n.ch, hkallweit1@...il.com, linux@...linux.org.uk,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, f.fainelli@...il.com,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH net 1/2] dt: ar803x: Document disable-hibernation property

From: Wei Fang <wei.fang@....com>

The hibernation mode of Atheros AR803x PHYs is default enabled.
When the cable is unplugged, the PHY will enter hibernation
mode and the PHY clock does down. For some MACs, it needs the
clock to support it's logic. For instance, stmmac needs the PHY
inputs clock is present for software reset completion. Therefore,
It is reasonable to add a DT property to disable hibernation mode.

Signed-off-by: Wei Fang <wei.fang@....com>
---
 Documentation/devicetree/bindings/net/qca,ar803x.yaml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/qca,ar803x.yaml b/Documentation/devicetree/bindings/net/qca,ar803x.yaml
index b3d4013b7ca6..d08431d79b83 100644
--- a/Documentation/devicetree/bindings/net/qca,ar803x.yaml
+++ b/Documentation/devicetree/bindings/net/qca,ar803x.yaml
@@ -40,6 +40,12 @@ properties:
       Only supported on the AR8031.
     type: boolean
 
+  qca,disable-hibernation:
+    description: |
+    If set, the PHY will not enter hibernation mode when the cable is
+    unplugged.
+    type: boolean
+
   qca,smarteee-tw-us-100m:
     description: EEE Tw parameter for 100M links.
     $ref: /schemas/types.yaml#/definitions/uint32
-- 
2.25.1