linux-kernel - RE: [PATCH v2 3/3] usb: musb: omap: Add device tree support for omap musb glue

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Date:	Tue, 11 Sep 2012 11:34:56 +0000
From:	"Hiremath, Vaibhav" <hvaibhav@...com>
To:	"ABRAHAM, KISHON VIJAY" <kishon@...com>
CC:	"Balbi, Felipe" <balbi@...com>,
	"grant.likely@...retlab.ca" <grant.likely@...retlab.ca>,
	"rob.herring@...xeda.com" <rob.herring@...xeda.com>,
	"rob@...dley.net" <rob@...dley.net>,
	"linux@....linux.org.uk" <linux@....linux.org.uk>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"Cousson, Benoit" <b-cousson@...com>,
	"Nayak, Rajendra" <rnayak@...com>,
	"tony@...mide.com" <tony@...mide.com>,
	"devicetree-discuss@...ts.ozlabs.org" 
	<devicetree-discuss@...ts.ozlabs.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>
Subject: RE: [PATCH v2 3/3] usb: musb: omap: Add device tree support for
 omap musb glue

On Tue, Sep 11, 2012 at 16:54:37, ABRAHAM, KISHON VIJAY wrote:
> Hi,
> 
> On Tue, Sep 11, 2012 at 3:23 PM, Vaibhav Hiremath <hvaibhav@...com> wrote:
> >
> >
> > On 9/11/2012 2:39 PM, Kishon Vijay Abraham I wrote:
> >> Added device tree support for omap musb driver and updated the
> >> Documentation with device tree binding information.
> >>
> >> Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
> >> ---
> >>  Documentation/devicetree/bindings/usb/omap-usb.txt |   33 ++++++++++++
> >>  drivers/usb/musb/omap2430.c                        |   54 ++++++++++++++++++++
> >>  2 files changed, 87 insertions(+)
> >>  create mode 100644 Documentation/devicetree/bindings/usb/omap-usb.txt
> >>
> >> diff --git a/Documentation/devicetree/bindings/usb/omap-usb.txt b/Documentation/devicetree/bindings/usb/omap-usb.txt
> >> new file mode 100644
> >> index 0000000..29a043e
> >> --- /dev/null
> >> +++ b/Documentation/devicetree/bindings/usb/omap-usb.txt
> >> @@ -0,0 +1,33 @@
> >> +OMAP GLUE
> >> +
> >> +OMAP MUSB GLUE
> >> + - compatible : Should be "ti,omap4-musb" or "ti,omap3-musb"
> >> + - ti,hwmods : must be "usb_otg_hs"
> >> + - multipoint : Should be "1" indicating the musb controller supports
> >> +   multipoint. This is a MUSB configuration-specific setting.
> >> + - num_eps : Specifies the number of endpoints. This is also a
> >> +   MUSB configuration-specific setting. Should be set to "16"
> >> + - ram_bits : Specifies the ram address size. Should be set to "12"
> >> + - interface_type : This is a board specific setting to describe the type of
> >> +   interface between the controller and the phy. It should be "0" or "1"
> >> +   specifying ULPI and UTMI respectively.
> >> + - mode : Should be "3" to represent OTG. "1" signifies HOST and "2"
> >> +   represents PERIPHERAL.
> >> + - power : Should be "50". This signifies the controller can supply upto
> >> +   100mA when operating in host mode.
> >> +
> >> +SOC specific device node entry
> >> +usb_otg_hs: usb_otg_hs@...ab000 {
> >> +     compatible = "ti,omap4-musb";
> >> +     ti,hwmods = "usb_otg_hs";
> >> +     multipoint = <1>;
> >> +     num_eps = <16>;
> >> +     ram_bits = <12>;
> >> +};
> >
> >
> > reg and interrupt properties are missing here.
> >
> > I would encourage to specify "reg" and "interrupt" properties in every
> > node getting newly added to the OMAP DTS files.
> 
> Sure. will add that in my next version.
> 

I saw there is some discussion going-on for which baseline to use, so make 
sure that you test the patches on top of below patch (already available in 
linux-omap/devel-dt)

http://git.kernel.org/?p=linux/kernel/git/tmlind/linux-omap.git;a=commit;h=b82b04e8eb27abe0cfe9cd7bf4fee8bb1bb9b013


Thanks,
Vaibhav
> Thanks
> Kishon
> 

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