linux-kernel - [PATCH 1/4] dt-bindings: phy: imx8mq-usb: add alternate reference clock

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Message-Id: <20250919-usb-phy-alt-clk-support-v1-1-57c2a13eea1c@nxp.com>
Date: Fri, 19 Sep 2025 15:02:57 +0800
From: Xu Yang <xu.yang_2@....com>
To: Vinod Koul <vkoul@...nel.org>, 
 Kishon Vijay Abraham I <kishon@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>, 
 Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>, Li Jun <jun.li@....com>, 
 Abel Vesa <abelvesa@...nel.org>, Peng Fan <peng.fan@....com>, 
 Michael Turquette <mturquette@...libre.com>, 
 Stephen Boyd <sboyd@...nel.org>
Cc: linux-phy@...ts.infradead.org, devicetree@...r.kernel.org, 
 imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org, 
 linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org, 
 Xu Yang <xu.yang_2@....com>
Subject: [PATCH 1/4] dt-bindings: phy: imx8mq-usb: add alternate reference
 clock

Except default 24MHz clock, alternate 100MHz reference clock can be used
as USB PHY reference clock too. Add "alt" clock and clock name.

Signed-off-by: Xu Yang <xu.yang_2@....com>
---
 Documentation/devicetree/bindings/phy/fsl,imx8mq-usb-phy.yaml | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/phy/fsl,imx8mq-usb-phy.yaml b/Documentation/devicetree/bindings/phy/fsl,imx8mq-usb-phy.yaml
index 22dd91591a09428214afaa4c9c8e37aae9bd8aba..268f86b04ce88cb81d2c06ee507fe0483d713f8f 100644
--- a/Documentation/devicetree/bindings/phy/fsl,imx8mq-usb-phy.yaml
+++ b/Documentation/devicetree/bindings/phy/fsl,imx8mq-usb-phy.yaml
@@ -27,11 +27,16 @@ properties:
     const: 0
 
   clocks:
-    maxItems: 1
+    minItems: 1
+    items:
+      - description: PHY configuration clock
+      - description: Alternate PHY reference clock
 
   clock-names:
+    minItems: 1
     items:
       - const: phy
+      - const: alt
 
   power-domains:
     maxItems: 1

-- 
2.34.1