linux-kernel - [PATCH v2 2/2] dt-bindings: net: phy: vsc8531: document 'vsc8531,clkout-freq-mhz' property

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Date:   Thu, 13 Jul 2023 23:21:23 +0300
From:   Alexandru Ardelean <alex@...uggie.ro>
To:     netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        andrew@...n.ch, hkallweit1@...il.com, linux@...linux.org.uk,
        olteanv@...il.com, alex@...uggie.ro, marius.muresan@....ro
Subject: [PATCH v2 2/2] dt-bindings: net: phy: vsc8531: document 'vsc8531,clkout-freq-mhz' property

For VSC8351 and similar PHYs, a new property was added to generate a clock
signal on the CLKOUT pin.
This change documents the change in the device-tree bindings doc.

Signed-off-by: Alexandru Ardelean <alex@...uggie.ro>
---

Changelog v1 -> v2:
* https://lore.kernel.org/netdev/20230706081554.1616839-2-alex@shruggie.ro/
* changed property name 'vsc8531,clkout-freq-mhz' -> 'mscc,clkout-freq-mhz'
  as requested by Rob
* added 'net-next' tag as requested by Andrew

 Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt b/Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt
index 0a3647fe331b..085d0e8a834e 100644
--- a/Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt
+++ b/Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt
@@ -31,6 +31,10 @@ Optional properties:
 			  VSC8531_LINK_100_ACTIVITY (2),
 			  VSC8531_LINK_ACTIVITY (0) and
 			  VSC8531_DUPLEX_COLLISION (8).
+- mscc,clkout-freq-mhz	: For VSC8531 and similar PHYs, this will output
+			  a clock signal on the CLKOUT pin of the chip.
+			  The supported values are 25, 50 & 125 Mhz.
+			  Default value is no clock signal on the CLKOUT pin.
 - load-save-gpios	: GPIO used for the load/save operation of the PTP
 			  hardware clock (PHC).
 
@@ -69,5 +73,6 @@ Example:
                 vsc8531,edge-slowdown	= <7>;
                 vsc8531,led-0-mode	= <VSC8531_LINK_1000_ACTIVITY>;
                 vsc8531,led-1-mode	= <VSC8531_LINK_100_ACTIVITY>;
+                mscc,clkout-freq-mhz	= <50>;
 		load-save-gpios		= <&gpio 10 GPIO_ACTIVE_HIGH>;
         };
-- 
2.41.0