Re: Continuous USB resets on NXP i.MX 6ULL device

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On Wed, Feb 28, 2018 at 06:08:20PM +0100, Stefan Wahren wrote:
> Hi,
> 
> i'm not sure this is related, but i noticed something ugly in
> driver/usb/chipidea/usbmisc_imx.c.
> 
> The compatible "fsl,imx6ul-usbmisc" uses imx6sx_usbmisc_ops, which uses
> usbmisc_imx6sx_init (which also calls usbmisc_imx6q_init).
> Within usbmisc_imx6q_init the flag MX6_BM_NON_BURST_SETTING is enabled.
> 
> But according to the i.MX6 ULL reference manual this bit is marked as
> reserved and set to zero at reset.
> 

For non-core registers, i.mx6ull can use i.mx6q as its base setting, the
bits you mentioned may also be reserved at imx6qdl RM.

-- 

Best Regards,
Peter Chen
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