On 06.07.2017 04:24, Peter Chen wrote:
> On Wed, Jul 05, 2017 at 08:19:53PM +0300, Dmitry Osipenko wrote:
>> From: Thierry Reding <treding@xxxxxxxxxx>
>>
>> Override the compatible string of the first USB controller to enable
>> device mode.
>>
>> Signed-off-by: Thierry Reding <treding@xxxxxxxxxx>
>> ---
>> arch/arm/boot/dts/tegra20-trimslice.dts | 2 ++
>> 1 file changed, 2 insertions(+)
>>
>> diff --git a/arch/arm/boot/dts/tegra20-trimslice.dts b/arch/arm/boot/dts/tegra20-trimslice.dts
>> index b902ab594afa..96b4f3f9827b 100644
>> --- a/arch/arm/boot/dts/tegra20-trimslice.dts
>> +++ b/arch/arm/boot/dts/tegra20-trimslice.dts
>> @@ -336,7 +336,9 @@
>> };
>>
>> usb@c5000000 {
>> + compatible = "nvidia,tegra20-udc";
>> status = "okay";
>> + dr_mode = "otg";
>
> If this board supports peripheral-only, you need to
> set dr_mode as "peripheral".
>
It should support OTG, but we aren't going to implement the host mode switch for
now. Stephen claims that the host mode is working with the tegra-ehci driver, it
would be nice if anyone could confirm this.
--
Dmitry
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