Re: [PATCH] usb: ohci: Allow ohci on omap5 also

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



* Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> [160910 19:27]:
> On Fri, 9 Sep 2016, Alan Stern wrote:
> 
> > On Fri, 9 Sep 2016, Tony Lindgren wrote:
> > 
> > > * Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> [160909 13:41]:
> > > > On Fri, 9 Sep 2016, Tony Lindgren wrote:
> > > > 
> > > > > * Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> [160909 12:47]:
> > > > > > You know, as far as I can tell the only thing that is OMAP-specific
> > > > > > about the ohci-omap3 driver is the initialization of OHCI_CTRL_RWC.  
> > > > > > This could be added to the platform data or the DT bindings, after
> > > > > > which this driver wouldn't be needed at all -- the ohci_platform driver
> > > > > > would work.  Does this seem reasonable?
> > > > > 
> > > > > Sure makes sense to me. Do we have some standard binding for
> > > > > OCHI_CTRL_RWC?
> > > > 
> > > > No, one would have to be created.
> > > 
> > > OK I can do a patch for that, what should be binding be?
> > > 
> > > ohci-ctrl-rwc-something?
> > 
> > OHCI_CTRL_RWC is just a single-bit flag; the RWC part stands for
> > "Remote Wakeup Control".
> 
> Sorry, careless mistake on my part.  It actually stands for "Remote 
> Wakeup Connected"; meaning that the remote-wakeup output signal from 
> the controller is connected to something really can wake up the system.
> This is exactly the sort of hardware implementation detail that the 
> firmware is supposed to know.

OK thanks. I think it can be set up as a generic wakeirq.

> >  The flag indicates whether the controller
> > hardware is able to wake up the system, and it is supposed to be set
> > initially by the firmware during boot-up.  Under DT, the driver will
> > have to set it manually.
> > 
> > So you could call it ohci-ctrl-rwc-on, or ohci-ctrl-rwc-enable, or 
> > anything similar.  Use your own judgment.

OK

Regards,

Tony
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Linux Media]     [Linux Input]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]     [Old Linux USB Devel Archive]

  Powered by Linux