From ea32cd911368e32eb770c9078158467845c82b9a Mon Sep 17 00:00:00 2001 From: Jisheng Zhang Date: Tue, 26 Aug 2025 07:45:07 +0800 Subject: [PATCH] dt-bindings: usb: usb251xb: support usage case without I2C control Currently, the usb251xb assumes i2c control, but from HW point of view, the hub supports usage case without any i2c control, I.E we only want the gpio controls, for example the following dt node: usb-hub { compatible = "microchip,usb2512b"; reset-gpios = <&porta 8 GPIO_ACTIVE_LOW>; }; Modify the dt-binding of usb2512b to support this usage case, and add the usage example to the examples section. Signed-off-by: Jisheng Zhang Reviewed-by: Krzysztof Kozlowski Link: https://lore.kernel.org/r/20250825234509.1041-2-jszhang@kernel.org Signed-off-by: Greg Kroah-Hartman --- Documentation/devicetree/bindings/usb/usb251xb.yaml | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/usb/usb251xb.yaml b/Documentation/devicetree/bindings/usb/usb251xb.yaml index ac5b99710332..0329a6aaaa92 100644 --- a/Documentation/devicetree/bindings/usb/usb251xb.yaml +++ b/Documentation/devicetree/bindings/usb/usb251xb.yaml @@ -240,7 +240,6 @@ additionalProperties: false required: - compatible - - reg examples: - | @@ -269,3 +268,11 @@ examples: swap-dx-lanes = <1 2>; }; }; + + - | + #include + usb-hub { + /* I2C is not connected */ + compatible = "microchip,usb2512b"; + reset-gpios = <&porta 8 GPIO_ACTIVE_LOW>; + }; -- 2.47.3