linux-kernel - Re: [PATCH 3/4] dts: dra7-evm: add USB support

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Message-ID: <51FF6A45.3060702@ti.com>
Date:	Mon, 5 Aug 2013 14:33:01 +0530
From:	George Cherian <george.cherian@...com>
To:	Roger Quadros <rogerq@...com>
CC:	<tony@...mide.com>, <rnayak@...com>, <benoit.cousson@...aro.org>,
	<balbi@...com>, <kishon@...com>, <dmurphy@...com>,
	<t-kristo@...com>, <linux-omap@...r.kernel.org>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/4] dts: dra7-evm: add USB support

On 8/5/2013 1:25 PM, Roger Quadros wrote:
> On 08/02/2013 06:04 PM, George Cherian wrote:
>> On 8/1/2013 8:28 PM, Roger Quadros wrote:
>>> Add USB drv_vbus pinctrl information and USB mode
>>> for the USB controller.
>>>
>>> Signed-off-by: Roger Quadros <rogerq@...com>
>>> ---
>>>    arch/arm/boot/dts/dra7-evm.dts |   22 ++++++++++++++++++++++
>>>    1 files changed, 22 insertions(+), 0 deletions(-)
>>>
>>> diff --git a/arch/arm/boot/dts/dra7-evm.dts b/arch/arm/boot/dts/dra7-evm.dts
>>> index cb0703c..acd3c09 100644
>>> --- a/arch/arm/boot/dts/dra7-evm.dts
>>> +++ b/arch/arm/boot/dts/dra7-evm.dts
>>> @@ -18,3 +18,25 @@
>>>            reg = <0x80000000 0x60000000>; /* 1536 MB */
>>>        };
>>>    };
>>> +
>>> +&dra7_pmx_core {
>>> +        pinctrl-names = "default";
>>> +        pinctrl-0 = <
>>> +        &usb_pins
>>> +    >;
>>> +
>>> +    usb_pins: pinmux_usb_pins {
>>> +                pinctrl-single,pins = <
>>> +            0x280    0xc0000    /* usb1_drvvbus, SLOW_SLEW | PULLUPEN | MODE0 */
>>> +            0x284    0xc0000 /* usb2_drvvbus, SLOW_SLEW | PULLUPEN | MODE0 */
>>> +                >;
>>> +        };
>>> +};
>>> +
>>> +&dwc3_1 {
>>> +    dr_mode = "otg";
>> otg???
> What's wrong there?
> please see
> Documentation/devicetree/bindings/usb/generic.txt
>
> we want it to operate in dual role mode and hence "otg"

Am sorry for not being clear with my earlier comment.
I meant whether we have otg/ DRD working. Till then shouldnt we put 
either peripheral/host?
> cheers,
> -roger


-- 
-George

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