Currently, the usb251xb assumes i2c control, and the corresponding
dt node looks like the following:
i2c {
usb-hub@2c {
compatible = "microchip,usb2512b";
reg = <0x2c>;
reset-gpios = <&porta 8 GPIO_ACTIVE_LOW>;
};
};
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
usage example to the examples section.
Signed-off-by: Jisheng Zhang <jszhang@xxxxxxxxxx>
---
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 <dt-bindings/gpio/gpio.h>
+ usb-hub {
+ /* I2C is not connected */
+ compatible = "microchip,usb2512b";
+ reset-gpios = <&porta 8 GPIO_ACTIVE_LOW>;
+ };
--
2.50.0
