The Genesys Logic GL850G is a USB 2.0 Single TT hub controller that
features 4 downstream ports, an internal 5V-to-3.3V LDO regulator (can
be bypassed) and an external reset pin.
Add a device tree binding for its USB protocol part. The internal LDO is
not covered by this and can just be modelled as a fixed regulator.
Signed-off-by: Icenowy Zheng <uwu@icenowy.me>
---
Changes in v2:
- Misc fixes suggested by Krzysztof, including property descriptions,
single-item "items" and fixing the example's gpio property.
- Fixed $id.
.../bindings/usb/genesys,gl850g.yaml | 47 +++++++++++++++++++
1 file changed, 47 insertions(+)
create mode 100644 Documentation/devicetree/bindings/usb/genesys,gl850g.yaml
diff --git a/Documentation/devicetree/bindings/usb/genesys,gl850g.yaml b/Documentation/devicetree/bindings/usb/genesys,gl850g.yaml
new file mode 100644
index 000000000000..966462ca6acb
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/genesys,gl850g.yaml
@@ -0,0 +1,47 @@
+# SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/genesys,gl850g.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Genesys Logic GL850G USB 2.0 hub controller
+
+maintainers:
+ - Icenowy Zheng <uwu@icenowy.me>
+
+allOf:
+ - $ref: usb-device.yaml#
+
+properties:
+ compatible:
+ enum:
+ - usb5e3,608
+
+ reg: true
+
+ reset-gpios:
+ description: GPIO controlling the RESET# pin.
+
+ vdd-supply:
+ description:
+ the regulator that provides 3.3V core power to the hub.
+
+required:
+ - compatible
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+ usb {
+ dr_mode = "host";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ hub: hub@1 {
+ compatible = "usb5e3,608";
+ reg = <1>;
+ reset-gpios = <&pio 7 2>;
+ };
+ };
--
2.38.1On 02/12/2022 09:16, Icenowy Zheng wrote:
> The Genesys Logic GL850G is a USB 2.0 Single TT hub controller that
> features 4 downstream ports, an internal 5V-to-3.3V LDO regulator (can
> be bypassed) and an external reset pin.
>
> Add a device tree binding for its USB protocol part. The internal LDO is
> not covered by this and can just be modelled as a fixed regulator.
>
> Signed-off-by: Icenowy Zheng <uwu@icenowy.me>
> ---
> Changes in v2:
> - Misc fixes suggested by Krzysztof, including property descriptions,
> single-item "items" and fixing the example's gpio property.
> - Fixed $id.
>
(...)
> +
> +examples:
> + - |
> + usb {
> + dr_mode = "host";
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + hub: hub@1 {
> + compatible = "usb5e3,608";
> + reg = <1>;
> + reset-gpios = <&pio 7 2>;
Use GPIO flags. What did you fix in the example?
Best regards,
Krzysztof
在 2022-12-02星期五的 10:02 +0100，Krzysztof Kozlowski写道：
> On 02/12/2022 09:16, Icenowy Zheng wrote:
> > The Genesys Logic GL850G is a USB 2.0 Single TT hub controller that
> > features 4 downstream ports, an internal 5V-to-3.3V LDO regulator
> > (can
> > be bypassed) and an external reset pin.
> >
> > Add a device tree binding for its USB protocol part. The internal
> > LDO is
> > not covered by this and can just be modelled as a fixed regulator.
> >
> > Signed-off-by: Icenowy Zheng <uwu@icenowy.me>
> > ---
> > Changes in v2:
> > - Misc fixes suggested by Krzysztof, including property
> > descriptions,
> > single-item "items" and fixing the example's gpio property.
> > - Fixed $id.
> >
> (...)
>
> > +
> > +examples:
> > + - |
> > + usb {
> > + dr_mode = "host";
> > + #address-cells = <1>;
> > + #size-cells = <0>;
> > +
> > + hub: hub@1 {
> > + compatible = "usb5e3,608";
> > + reg = <1>;
> > + reset-gpios = <&pio 7 2>;
>
> Use GPIO flags. What did you fix in the example?
It used to be here, but using it needs another include, which I don't
think it necessary here.
Maybe I should just drop this line in the example?
>
>
>
> Best regards,
> Krzysztof
>
On 02/12/2022 17:54, Icenowy Zheng wrote:
> 在 2022-12-02星期五的 10:02 +0100，Krzysztof Kozlowski写道：
>> On 02/12/2022 09:16, Icenowy Zheng wrote:
>>> The Genesys Logic GL850G is a USB 2.0 Single TT hub controller that
>>> features 4 downstream ports, an internal 5V-to-3.3V LDO regulator
>>> (can
>>> be bypassed) and an external reset pin.
>>>
>>> Add a device tree binding for its USB protocol part. The internal
>>> LDO is
>>> not covered by this and can just be modelled as a fixed regulator.
>>>
>>> Signed-off-by: Icenowy Zheng <uwu@icenowy.me>
>>> ---
>>> Changes in v2:
>>> - Misc fixes suggested by Krzysztof, including property
>>> descriptions,
>>> single-item "items" and fixing the example's gpio property.
>>> - Fixed $id.
>>>
>> (...)
>>
>>> +
>>> +examples:
>>> + - |
>>> + usb {
>>> + dr_mode = "host";
>>> + #address-cells = <1>;
>>> + #size-cells = <0>;
>>> +
>>> + hub: hub@1 {
>>> + compatible = "usb5e3,608";
>>> + reg = <1>;
>>> + reset-gpios = <&pio 7 2>;
>>
>> Use GPIO flags. What did you fix in the example?
>
> It used to be here, but using it needs another include, which I don't
> think it necessary here.
The header is necessary for the flags...
>
> Maybe I should just drop this line in the example?
It's useful. The example should be rather complete, not just compatible
and reg.
Different problem - you miss maxItems for the GPIOs.
Best regards,
Krzysztof
在 2022-12-02星期五的 17:59 +0100，Krzysztof Kozlowski写道：
> On 02/12/2022 17:54, Icenowy Zheng wrote:
> > 在 2022-12-02星期五的 10:02 +0100，Krzysztof Kozlowski写道：
> > > On 02/12/2022 09:16, Icenowy Zheng wrote:
> > > > The Genesys Logic GL850G is a USB 2.0 Single TT hub controller
> > > > that
> > > > features 4 downstream ports, an internal 5V-to-3.3V LDO
> > > > regulator
> > > > (can
> > > > be bypassed) and an external reset pin.
> > > >
> > > > Add a device tree binding for its USB protocol part. The
> > > > internal
> > > > LDO is
> > > > not covered by this and can just be modelled as a fixed
> > > > regulator.
> > > >
> > > > Signed-off-by: Icenowy Zheng <uwu@icenowy.me>
> > > > ---
> > > > Changes in v2:
> > > > - Misc fixes suggested by Krzysztof, including property
> > > > descriptions,
> > > > single-item "items" and fixing the example's gpio property.
> > > > - Fixed $id.
> > > >
> > > (...)
> > >
> > > > +
> > > > +examples:
> > > > + - |
> > > > + usb {
> > > > + dr_mode = "host";
> > > > + #address-cells = <1>;
> > > > + #size-cells = <0>;
> > > > +
> > > > + hub: hub@1 {
> > > > + compatible = "usb5e3,608";
> > > > + reg = <1>;
> > > > + reset-gpios = <&pio 7 2>;
> > >
> > > Use GPIO flags. What did you fix in the example?
> >
> > It used to be here, but using it needs another include, which I
> > don't
> > think it necessary here.
>
> The header is necessary for the flags...
>
> >
> > Maybe I should just drop this line in the example?
>
> It's useful. The example should be rather complete, not just
> compatible
> and reg.
>
> Different problem - you miss maxItems for the GPIOs.
Okay thanks.
>
> Best regards,
> Krzysztof
>
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