[1/2] dt-bindings: usb: Add binding for TI USB8020B hub controller
Commit Message
The TI USB8020B is a USB 3.0 hub controller with 2 ports.
This initial version of the binding only describes USB related aspects
of the USB8020B, it does not cover the option of connecting the controller
as an i2c slave.
Signed-off-by: Macpaul Lin <macpaul.lin@mediatek.com>
---
.../devicetree/bindings/usb/ti,usb8020b.yaml | 69 +++++++++++++++++++
1 file changed, 69 insertions(+)
create mode 100644 Documentation/devicetree/bindings/usb/ti,usb8020b.yaml
Comments
On Tue, Feb 27, 2024 at 05:02:27PM +0800, Macpaul Lin wrote:
> The TI USB8020B is a USB 3.0 hub controller with 2 ports.
>
> This initial version of the binding only describes USB related aspects
> of the USB8020B, it does not cover the option of connecting the controller
> as an i2c slave.
>
> Signed-off-by: Macpaul Lin <macpaul.lin@mediatek.com>
> ---
> .../devicetree/bindings/usb/ti,usb8020b.yaml | 69 +++++++++++++++++++
> 1 file changed, 69 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/usb/ti,usb8020b.yaml
>
> diff --git a/Documentation/devicetree/bindings/usb/ti,usb8020b.yaml b/Documentation/devicetree/bindings/usb/ti,usb8020b.yaml
> new file mode 100644
> index 000000000000..8ef117793e11
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/usb/ti,usb8020b.yaml
> @@ -0,0 +1,69 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/usb/ti,usb8020b.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: TI USB8020B USB 3.0 hub controller
> +
> +maintainers:
> + - Macpaul Lin <macpaul.lin@mediatek.com>
> +
> +allOf:
> + - $ref: usb-device.yaml#
> +
> +properties:
> + compatible:
> + enum:
> + - usb451,8025
> + - usb451,8027
> +
> + reg: true
> +
> + reset-gpios:
> + items:
> + - description: GPIO specifier for GRST# pin.
> +
> + vdd-supply:
There is currently a rework of the onboard_usb_hub driver ongoing to
support the actual names of the supplies, instead of the generic 'vdd-supply':
https://lore.kernel.org/linux-usb/20240220-onboard_xvf3500-v4-0-dc1617cc5dd4@wolfvision.net/
I think for new bindings we should wait until this rework is done and the binding
should have the hub specific supply name.
new file mode 100644
@@ -0,0 +1,69 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/ti,usb8020b.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TI USB8020B USB 3.0 hub controller
+
+maintainers:
+ - Macpaul Lin <macpaul.lin@mediatek.com>
+
+allOf:
+ - $ref: usb-device.yaml#
+
+properties:
+ compatible:
+ enum:
+ - usb451,8025
+ - usb451,8027
+
+ reg: true
+
+ reset-gpios:
+ items:
+ - description: GPIO specifier for GRST# pin.
+
+ vdd-supply:
+ description:
+ VDD power supply to the hub
+
+ peer-hub:
+ $ref: /schemas/types.yaml#/definitions/phandle
+ description:
+ phandle to the peer hub on the controller.
+
+required:
+ - compatible
+ - reg
+ - peer-hub
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+
+ usb {
+ dr_mode = "host";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ /* 2.0 hub on port 1 */
+ hub_2_0: hub@1 {
+ compatible = "usb451,8027";
+ reg = <1>;
+ peer-hub = <&hub_3_0>;
+ reset-gpios = <&pio 7 GPIO_ACTIVE_HIGH>;
+ vdd-supply = <&usb_hub_fixed_3v3>;
+ };
+
+ /* 3.0 hub on port 2 */
+ hub_3_0: hub@2 {
+ compatible = "usb451,8025";
+ reg = <2>;
+ peer-hub = <&hub_2_0>;
+ reset-gpios = <&pio 7 GPIO_ACTIVE_HIGH>;
+ vdd-supply = <&usb_hub_fixed_3v3>;
+ };
+ };