usbmisc_imx: charger detection errors

usbmisc_imx: charger detection errors

[Fabio Estevam]

Hi Li Jun,

Since commit 746f316b753a ("usb: chipidea: introduce imx7d USB charger
detection") in linux-next, the following error log is seen on a
imx7s-warp board:

[    4.919845] usbmisc_imx 30b10200.usbmisc: vbus is error
[    4.925173] usbmisc_imx 30b10200.usbmisc: Error occurs during detection: -22

What is the proper way to address this?

Thanks,

Fabio Estevam

RE: usbmisc_imx: charger detection errors

[Jun Li]

Hi Fabio,

> -----Original Message-----
> From: Fabio Estevam <festevam@gmail.com>
> Sent: 2020年5月16日 5:12
> To: Jun Li <jun.li@nxp.com>
> Cc: Peter Chen <peter.chen@nxp.com>; USB list <linux-usb@vger.kernel.org>
> Subject: usbmisc_imx: charger detection errors
> 
> Hi Li Jun,
> 
> Since commit 746f316b753a ("usb: chipidea: introduce imx7d USB charger
> detection") in linux-next, the following error log is seen on a imx7s-warp board:
> 
> [    4.919845] usbmisc_imx 30b10200.usbmisc: vbus is error

This indicates the voltage of VBUS pad is below VBUS valid threshold(defaut
is 4.75v), how is vbus connected on your imx7s-warp board? is the vbus connected
from USB connector to vbus pad of imx7s SoC?

Li Jun

> [    4.925173] usbmisc_imx 30b10200.usbmisc: Error occurs during detection: -22
> 
> What is the proper way to address this?
> 
> Thanks,
> 
> Fabio Estevam

Re: usbmisc_imx: charger detection errors

[Fabio Estevam]

Hi Li Jun,

On Sat, May 16, 2020 at 3:33 AM Jun Li <jun.li@nxp.com> wrote:

> This indicates the voltage of VBUS pad is below VBUS valid threshold(defaut
> is 4.75v), how is vbus connected on your imx7s-warp board? is the vbus connected
> from USB connector to vbus pad of imx7s SoC?

I have sent you the schematics off-list.

Thanks

RE: usbmisc_imx: charger detection errors

[Jun Li]

Hi Fabio
> -----Original Message-----
> From: Fabio Estevam <festevam@gmail.com>
> Sent: 2020年5月16日 19:36
> To: Jun Li <jun.li@nxp.com>
> Cc: Peter Chen <peter.chen@nxp.com>; USB list <linux-usb@vger.kernel.org>
> Subject: Re: usbmisc_imx: charger detection errors
> 
> Hi Li Jun,
> 
> On Sat, May 16, 2020 at 3:33 AM Jun Li <jun.li@nxp.com> wrote:
> 
> > This indicates the voltage of VBUS pad is below VBUS valid
> > threshold(defaut is 4.75v), how is vbus connected on your imx7s-warp
> > board? is the vbus connected from USB connector to vbus pad of imx7s SoC?
> 
> I have sent you the schematics off-list.

From the schematics, the vbus is connected from connector to
Vbus pad of imx7s.
This error can be seen when you connect your imx7s board to whatever
Power source?(Charger, PC host)?  

Please dump the below registers after connect the otg port
to the power source for issue case:

Non-core:
0x30b10400 ~ 0x30b10440

Li Jun
> 
> Thanks

Re: usbmisc_imx: charger detection errors

[Fabio Estevam]

Hi Li Jun,

On Mon, May 18, 2020 at 9:09 AM Jun Li <jun.li@nxp.com> wrote:

> Please dump the below registers after connect the otg port
> to the power source for issue case:
>
> Non-core:
> 0x30b10400 ~ 0x30b10440

Today I was going to dump these registers, but I cannot see the
original error anymore.

If I ever see it again, I will dump these registers and will let you know.

Thanks