linux-kernel - Re: [PATCH v1 01/11] dt-bindings: usb: Add device id for Genesys Logic hub controller

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Date:   Mon, 9 Jan 2023 23:18:19 +0530
From:   Anand Moon <linux.amoon@...il.com>
To:     Matthias Kaehlcke <mka@...omium.org>
Cc:     Icenowy Zheng <uwu@...nowy.me>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-amlogic@...ts.infradead.org, linux-usb@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 01/11] dt-bindings: usb: Add device id for Genesys
 Logic hub controller

Hi Matthias,

On Mon, 9 Jan 2023 at 21:59, Matthias Kaehlcke <mka@...omium.org> wrote:
>
> On Sat, Jan 07, 2023 at 08:31:23PM +0530, Anand Moon wrote:
> > Hi Matthias,
> >
> > Thanks for the review comments
> >
> > On Thu, 5 Jan 2023 at 04:25, Matthias Kaehlcke <mka@...omium.org> wrote:
> > >
> > > On Wed, Dec 28, 2022 at 03:59:17PM +0530, Anand Moon wrote:
> > > > Hi Icenowy,
> > > >
> > > > Thanks for the review comments
> > > >
> > > > On Wed, 28 Dec 2022 at 15:38, Icenowy Zheng <uwu@...nowy.me> wrote:
> > > > >
> > > > > 在 2022-12-28星期三的 10:03 +0000，Anand Moon写道：
> > > > > > Add usb hub device id for Genesys Logic, Inc. GL852G-OHG Hub USB 2.0
> > > > > > root hub and Genesys Logic, Inc. GL3523-QFN76 USB 3.1 root hub.
> > >
> > > nit: QFN 76 is one of the package options of the GL3523, I expect this
> > > binding to be applicable as well for other GL3523 variants, so I'd suggest
> > > to drop the suffix. Not sure what 'OHG' stands for, the Genesys website
> > > only lists a GL852G hub with different package types (none of them 'OHG'),
> > > so I'd say drop the suffix unless it is known that 'OHG' variant uses
> > > a different product id than other GL852G variants
> > >
> >
> > Yes, I will be sure to do this reference, I just picked these from the
> > board schematics.
> >
> > > > > >
> > > > > > Signed-off-by: Anand Moon <linux.amoon@...il.com>
> > > > > > ---
> > > > > >  Documentation/devicetree/bindings/usb/genesys,gl850g.yaml | 2 ++
> > > > > >  1 file changed, 2 insertions(+)
> > > > > >
> > > > > > diff --git
> > > > > > a/Documentation/devicetree/bindings/usb/genesys,gl850g.yaml
> > > > > > b/Documentation/devicetree/bindings/usb/genesys,gl850g.yaml
> > > > > > index a9f831448cca..db009f3ef438 100644
> > > > > > --- a/Documentation/devicetree/bindings/usb/genesys,gl850g.yaml
> > > > > > +++ b/Documentation/devicetree/bindings/usb/genesys,gl850g.yaml
> > > > > > @@ -16,6 +16,8 @@ properties:
> > > > > >    compatible:
> > > > > >      enum:
> > > > > >        - usb5e3,608
> > > > > > +      - genesys,usb5e3,610
> > > > > > +      - genesys,usb5e3,620
> > > > >
> > > > > I don't think genesys, is needed here because usb5e3 means USB VID
> > > > > 0x05e3, which is already linked to Genesys Logic.
> > > > >
> > > >
> > > > Ok, I added this as genesys, is it part of the manufacturer or vendor name
> > > > which is most commonly used for adding vendor-specific compatible strings.
> > >
> > > That doesn't follow the generic USB binding, please drop 'genesys,'.
> > >
> >
> > Yes, I will drop this in the next version.
> >
> > > > > In addition, the control logic of these two hubs are needed to be
> > > > > verified.
> > > >
> > > > We were using gpio-hog to reset the USB hub, so now switch to USB onboard hub
> > > >
> > > > >
> > > > > And what's the status of the companion hub of the USB3 hub? Is it
> > > > > really a USB3-only hub, or is its USB2 part just equal to another USB3
> > > > > hub?
> > > > >
> > > > usb5e3,610 is USB 2.0 port hub present on Odroid C1 and Odroid C2 board
> > > >
> > > > usb5e3,620 is USB 3.1 port hub present on Odroid N2.
> > >
> > > Like Icenowy I would expect the GL3523 to provide also a 2.0 hub.
> > >
> > > What is the output of 'lsusb' on the Odroid N2?
> >
> > alarm@...oid-n2:~$ lsusb -tv
> > /:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 5000M
> >     ID 1d6b:0003 Linux Foundation 3.0 root hub
> >     |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 5000M
> >         ID 05e3:0620 Genesys Logic, Inc. GL3523 Hub
> > /:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/2p, 480M
> >     ID 1d6b:0002 Linux Foundation 2.0 root hub
> >     |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M
> >         ID 05e3:0610 Genesys Logic, Inc. Hub
>
> Thanks. So it looks like 0x0610 is the product id of the USB 2.0 portion
> of the GL3523. From this patch it seems the GL852G uses the same product
> id?

Yes, it looks correct as per the lsusb output

Thanks
-Anand