On Tue, Apr 06, 2021 at 11:30:01AM -0500, Rob Herring wrote:
> On Mon, Apr 05, 2021 at 01:18:13PM -0700, Matthias Kaehlcke wrote:
> > The Realtek RTS5411 is a USB 3.0 hub controller with 4 ports.
> >
> > This initial version of the binding only describes USB related
> > aspects of the RTS5411, it does not cover the option of
> > connecting the controller as an i2c slave.
> >
> > Signed-off-by: Matthias Kaehlcke <m...@chromium.org>
> > ---
> >
> > Changes in v7:
> > - added type ref for 'companion-hub' property
> >
> > Changes in v6:
> > - Realtek binding instead of generic onboard_usb_hub
> > - added 'companion-hub' property
> > - added reference to 'usb-device.yaml'
> > - 'fixed' indentation of compatible entries to keep yamllint happy
> > - added 'additionalProperties' entry
> > - updated commit message
> >
> > Changes in v5:
> > - updated 'title'
> > - only use standard USB compatible strings
> > - deleted 'usb_hub' node
> > - renamed 'usb_controller' node to 'usb-controller'
> > - removed labels from USB nodes
> > - added 'vdd-supply' to USB nodes
> >
> > Changes in v4:
> > - none
> >
> > Changes in v3:
> > - updated commit message
> > - removed recursive reference to $self
> > - adjusted 'compatible' definition to support multiple entries
> > - changed USB controller phandle to be a node
> >
> > Changes in v2:
> > - removed 'wakeup-source' and 'power-off-in-suspend' properties
> > - consistently use spaces for indentation in example
> >
> > .../bindings/usb/realtek,rts5411.yaml | 59 +++++++++++++++++++
> > 1 file changed, 59 insertions(+)
> > create mode 100644
> > Documentation/devicetree/bindings/usb/realtek,rts5411.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/usb/realtek,rts5411.yaml
> > b/Documentation/devicetree/bindings/usb/realtek,rts5411.yaml
> > new file mode 100644
> > index 000000000000..b59001972749
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/usb/realtek,rts5411.yaml
> > @@ -0,0 +1,59 @@
> > +# SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/usb/realtek,rts5411.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Binding for the Realtek RTS5411 USB 3.0 hub controller
> > +
> > +maintainers:
> > + - Matthias Kaehlcke <m...@chromium.org>
> > +
> > +allOf:
> > + - $ref: usb-device.yaml#
> > +
> > +properties:
> > + compatible:
> > + items:
> > + - enum:
> > + - usbbda,5411
> > + - usbbda,411
> > +
>
> reg: true
>
> to fix the error.
Will fix in v8 (this is v7, even though the subject says otherwise,
I forgot to increment the version number when sending).
> > + vdd-supply:
> > + description:
> > + phandle to the regulator that provides power to the hub.
> > +
> > + companion-hub:
> > + $ref: '/schemas/types.yaml#/definitions/phandle'
> > + description:
> > + phandle to the companion hub on the controller.
>
> This should be required I think. I suppose you could only hook up 2.0
> ports, but why. And 3.0 only wouldn't be USB compliant, would it?
Agreed, that makes sense now that this is a specific binding for the
RTS5411. It seems unlikely that a system would use a USB 3.0 capable
hub on a USB 2.0 controller, and as you said 3.0 only wouldn't be USB
compliant.
I made the attribute initially optional because the binding was
intended to be generic (bad idea), and for certain hubs a required
'companion-hub' wouldn't make sense (e.g. USB 2.0 only).
> > +
> > +required:
> > + - compatible
> > + - reg
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > + - |
> > + usb-controller {
>
> 'usb' is the standard name.
ack
Thanks for your comments!
m.
