netdev - [PATCH net-next v3 1/2] dt-bindings: net: dp83822: Add support for GPIO2 clock output

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Message-Id: <20241212-dp83822-gpio2-clk-out-v3-1-e4af23490f44@liebherr.com>
Date: Thu, 12 Dec 2024 09:44:06 +0100
From: Dimitri Fedrau via B4 Relay <devnull+dimitri.fedrau.liebherr.com@...nel.org>
To: Andrew Lunn <andrew+netdev@...n.ch>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Andrew Davis <afd@...com>, 
 Andrew Lunn <andrew@...n.ch>, Heiner Kallweit <hkallweit1@...il.com>, 
 Russell King <linux@...linux.org.uk>
Cc: netdev@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Dimitri Fedrau <dimitri.fedrau@...bherr.com>, 
 Dimitri Fedrau <dima.fedrau@...il.com>
Subject: [PATCH net-next v3 1/2] dt-bindings: net: dp83822: Add support for
 GPIO2 clock output

From: Dimitri Fedrau <dimitri.fedrau@...bherr.com>

The GPIO2 pin on the DP83822 can be configured as clock output. Add
binding to support this feature.

Signed-off-by: Dimitri Fedrau <dimitri.fedrau@...bherr.com>
---
 .../devicetree/bindings/net/ti,dp83822.yaml        | 27 ++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/ti,dp83822.yaml b/Documentation/devicetree/bindings/net/ti,dp83822.yaml
index 784866ea392b2083e93d8dc9aaea93b70dc80934..50c24248df266f1950371b950cd9c4d417835f97 100644
--- a/Documentation/devicetree/bindings/net/ti,dp83822.yaml
+++ b/Documentation/devicetree/bindings/net/ti,dp83822.yaml
@@ -96,6 +96,32 @@ properties:
       - master
       - slave

+  ti,gpio2-clk-out:
+    description: |
+       DP83822 PHY only.
+       The GPIO2 pin on the DP83822 can be configured as clock output. When
+       omitted, the PHY's default will be left as is.
+
+       - 'mac-if': In MII mode the clock frequency is 25-MHz, in RMII Mode the
+         clock frequency is 50-MHz and in RGMII Mode the clock frequency is
+         25-MHz.
+       - 'xi': XI clock(pass-through clock from XI pin).
+       - 'int-ref': Internal reference clock 25-MHz.
+       - 'rmii-master-mode-ref': RMII master mode reference clock 50-MHz. RMII
+         master mode reference clock is identical to MAC IF clock in RMII master
+         mode.
+       - 'free-running': Free running clock 125-MHz.
+       - 'recovered': Recovered clock is a 125-MHz recovered clock from a
+         connected link partner.
+    $ref: /schemas/types.yaml#/definitions/string
+    enum:
+      - mac-if
+      - xi
+      - int-ref
+      - rmii-master-mode-ref
+      - free-running
+      - recovered
+
 required:
   - reg

@@ -110,6 +136,7 @@ examples:
         reg = <0>;
         rx-internal-delay-ps = <1>;
         tx-internal-delay-ps = <1>;
+        ti,gpio2-clk-out = "xi";
       };
     };

-- 
2.39.5