Re: [PATCH v3 1/1] arm64: dts: tqma8mpql: add USB DR support

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

Hello Tim,

On 17.10.22 21:30, Tim Harvey wrote:
> On Fri, Oct 14, 2022 at 7:18 AM Ahmad Fatoum <a.fatoum@pengutronix.de> wrote:
>>
>> Hello Alexander,
>>
>> On 05.09.22 09:37, Alexander Stein wrote:
>>> +     pinctrl_usb0: usb0grp {
>>> +             fsl,pins = <MX8MP_IOMUXC_GPIO1_IO13__USB1_OTG_OC        0x1c0>,
>>> +                        <MX8MP_IOMUXC_GPIO1_IO12__USB1_OTG_PWR       0x1c0>;
>>> +     };
>>> +
>>> +     pinctrl_usbcon0: usb0congrp {
>>> +             fsl,pins = <MX8MP_IOMUXC_GPIO1_IO10__GPIO1_IO10         0x1c0>;
>>> +     };
>>
>> I am wondering: You can mux for MX8MP_IOMUXC_GPIO1_IO10__USB1_OTG_ID,
>> why did you decide against using the hardware function here?
>>
> 
> Ahmad,
> 
> The IMX8MP USB OTG_ID pins are internally not connected. I can't
> recall where this is mentioned but due to this they can not be used to
> select host/device mode.

Thanks for the info. Do you know if this issue exists with the i.MX8MN as
well? A colleague had trouble bringing up the OTG_ID HW function and I assume
it may be the same issue. I am unsure though, because the imx8mn-tqma8mqnl-mba8mx.dts
muxes the pad as OTG_ID.

Cheers,
Ahmad

> 
> Best Regards,
> 
> Tim
> 


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