Re: am3517: fail to bring up EHCI in upstream kernel (4.9)

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On Tue, Dec 27, 2016 at 6:25 PM, Tony Lindgren <tony@xxxxxxxxxxx> wrote:
> * Yegor Yefremov <yegorslists@xxxxxxxxxxxxxx> [161220 06:37]:
>> I'm trying to get the first USB port working on a am3517 based
>> hardware. The system is working with 2.6.37 for now. USB tree has
>> following structure:
>>
>> HSUSB1  -> TUSB1210 -> SMSC LAN9514
>>
>> TUSB1210's reset is connected to GPIO 57
>> (GPMC_NCS6/SYS_NDMAREQ3/0/GPT11_PWM_EVT/GPIO_57)
>
> Could it be that the GPIO module reset during init turns off your
> hub?
>
> You may want to set up a GPIO hog in the dts for it if you don't
> have anything else handling that GPIO.

I've solved the problem. I've enabled EHCI PHY interface pinmux in
u-boot and it worked at once. reset GPIO seems to be OK from the
beginning. Have to find out why my pinmux settings in DTS didn't work.

Yegor
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