Hi Felipe-san,
> From: Felipe Balbi, Sent: Tuesday, March 28, 2017 9:06 PM
>
> Hi,
>
> Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx> writes:
> > Sadly, to change the role ("host" and "peripheral") of USB3.0 DRD
> > controller on R-Car Gen3, software has to set the DRD_CON register
> > which is included in a usb3.0 peripheral controler's register.
> > To simply implementation, the previous code always set peripheral mode
> > as hardcoded. However, to support usb role swap in the future,
> > the hardcoded is not good. So, this patch adds sysfs "role" to set
> > the mode by a user.
> > After applied this patch, since the DRD controller will act as host
> > mode after probed, a user needs to change the mode via the sysfs.
> >
> > Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
>
> in patch 3, you add extcon to monitor ID and VBUS pins. Do you really
> need this sysfs file at all?
Yes. This is because this "role" sysfs file cannot monitor the ID and VBUS pins.
The "role" only monitors the mode which is "host" or "peripheral".
Best regards,
Yoshihiro Shimoda
> --
> balbi
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