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Message-ID: <20160504131700.GA20184@rob-hp-laptop>
Date: Wed, 4 May 2016 08:17:00 -0500
From: Rob Herring <robh@...nel.org>
To: Roger Quadros <rogerq@...com>
Cc: peter.chen@...escale.com, stern@...land.harvard.edu,
balbi@...nel.org, gregkh@...uxfoundation.org,
dan.j.williams@...el.com, jun.li@...escale.com,
mathias.nyman@...ux.intel.com, tony@...mide.com,
Joao.Pinto@...opsys.com, abrestic@...omium.org,
yoshihiro.shimoda.uh@...esas.com, linux-usb@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org,
devicetree@...r.kernel.org
Subject: Re: [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@...esas.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@...esas.com>
> Signed-off-by: Roger Quadros <rogerq@...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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