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From:   Michael Walle <michael@walle.cc>
To:     "David S . Miller" <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Andrew Lunn <andrew@lunn.ch>,
        Heiner Kallweit <hkallweit1@gmail.com>,
        Russell King <linux@armlinux.org.uk>
Cc:     netdev@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, Michael Walle <michael@walle.cc>
Subject: [PATCH net-next v1 1/3] dt-bindings: net: micrel: add coma-mode-gpios property
Date:   Wed, 27 Apr 2022 23:44:04 +0200
Message-Id: <20220427214406.1348872-2-michael@walle.cc>
In-Reply-To: <20220427214406.1348872-1-michael@walle.cc>
References: <20220427214406.1348872-1-michael@walle.cc>
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The LAN8814 has a coma mode pin which is used to put the PHY into
isolate and power-down mode. Usually strapped to be asserted by default.
A GPIO is then used to take the PHY out of this mode.

Signed-off-by: Michael Walle <michael@walle.cc>
---
 Documentation/devicetree/bindings/net/micrel.txt | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/micrel.txt b/Documentation/devicetree/bindings/net/micrel.txt
index 8d157f0295a5..a9ed691ffb03 100644
--- a/Documentation/devicetree/bindings/net/micrel.txt
+++ b/Documentation/devicetree/bindings/net/micrel.txt
@@ -45,3 +45,12 @@ Optional properties:
 
 	In fiber mode, auto-negotiation is disabled and the PHY can only work in
 	100base-fx (full and half duplex) modes.
+
+ - coma-mode-gpios: If present the given gpio will be deasserted when the
+		    PHY is probed.
+
+	Some PHYs have a COMA mode input pin which puts the PHY into
+	isolate and power-down mode. On some boards this input is connected
+	to a GPIO of the SoC.
+
+	Supported on the LAN8814.
-- 
2.30.2