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 16:54:37 +0530
From:	"ABRAHAM, KISHON VIJAY" <kishon@...com>
To:	Vaibhav Hiremath <hvaibhav@...com>
Cc:	balbi@...com, grant.likely@...retlab.ca, rob.herring@...xeda.com,
	rob@...dley.net, linux@....linux.org.uk,
	gregkh@...uxfoundation.org, b-cousson@...com, rnayak@...com,
	tony@...mide.com, devicetree-discuss@...ts.ozlabs.org,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-omap@...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

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.

Thanks
Kishon
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