netdev - [PATCH v2 2/2] dt-bindings: net: add new property st,ext-phyclk in documentation for stm32

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Message-ID: <20240307135957.303481-3-christophe.roullier@foss.st.com>
Date: Thu, 7 Mar 2024 14:59:57 +0100
From: Christophe Roullier <christophe.roullier@...s.st.com>
To: "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet
	<edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni
	<pabeni@...hat.com>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski
	<krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue
	<alexandre.torgue@...s.st.com>,
        Richard Cochran <richardcochran@...il.com>,
        Jose Abreu <joabreu@...opsys.com>, Liam Girdwood <lgirdwood@...il.com>,
        Mark
 Brown <broonie@...nel.org>,
        Christophe Roullier
	<christophe.roullier@...s.st.com>
CC: <netdev@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v2 2/2] dt-bindings: net: add new property st,ext-phyclk in documentation for stm32

Add property st,ext-phyclk to manage cases when PHY have no cristal/quartz
This property can be used with RMII phy without cristal 50Mhz and when we
want to select RCC clock instead of ETH_REF_CLK
Can be used also with RGMII phy with no cristal and we select RCC clock
instead of ETH_CLK125

Signed-off-by: Christophe Roullier <christophe.roullier@...s.st.com>
---
 Documentation/devicetree/bindings/net/stm32-dwmac.yaml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/stm32-dwmac.yaml b/Documentation/devicetree/bindings/net/stm32-dwmac.yaml
index 80937b28fa046..529665d4fc911 100644
--- a/Documentation/devicetree/bindings/net/stm32-dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/stm32-dwmac.yaml
@@ -85,6 +85,13 @@ properties:
   phy-supply:
     description: PHY regulator
 
+  st,ext-phyclk:
+    description:
+      set this property in RMII mode when you have PHY without crystal 50MHz and want to
+      select RCC clock instead of ETH_REF_CLK. OR in RGMII mode when you want to select
+      RCC clock instead of ETH_CLK125.
+    type: boolean
+
   st,eth-clk-sel:
     description:
       set this property in RGMII PHY when you want to select RCC clock instead of ETH_CLK125.
-- 
2.25.1