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    SubjectRe: [PATCH v7 10/14] usb: otg: add hcd companion support
    On Mon, May 02, 2016 at 03:18:53PM +0300, Roger Quadros wrote:
    > From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
    >
    > Since some host controller (e.g. EHCI) needs a companion host controller
    > (e.g. OHCI), this patch adds such a configuration to use it in the OTG
    > core.
    >
    > Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
    > Signed-off-by: Roger Quadros <rogerq@ti.com>
    > ---
    > Documentation/devicetree/bindings/usb/generic.txt | 3 +++
    > drivers/usb/common/usb-otg.c | 32 ++++++++++++++++-------
    > include/linux/usb/otg.h | 7 ++++-
    > 3 files changed, 32 insertions(+), 10 deletions(-)
    >
    > diff --git a/Documentation/devicetree/bindings/usb/generic.txt b/Documentation/devicetree/bindings/usb/generic.txt
    > index f6866c1..1db1c33 100644
    > --- a/Documentation/devicetree/bindings/usb/generic.txt
    > +++ b/Documentation/devicetree/bindings/usb/generic.txt
    > @@ -27,6 +27,9 @@ Optional properties:
    > - otg-controller: phandle to otg controller. Host or gadget controllers can
    > contain this property to link it to a particular OTG
    > controller.
    > + - hcd-needs-companion: must be present if otg controller is dealing with
    > + EHCI host controller that needs a companion OHCI host
    > + controller.

    Don't you need to have a link to the companion controller node?

    >
    > This is an attribute to a USB controller such as:
    >

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