Hi,


On Tue, Jun 10, 2014 at 1:52 AM, Julius Werner [off-list ref] wrote:

quoted

diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 9ffecd5..453d89e 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h

@@ -1582,6 +1582,9 @@ struct xhci_hcd {
        u32                     port_status_u0;
 /* Compliance Mode Timer Triggered every 2 seconds */
 #define COMP_MODE_RCVRY_MSECS 2000
+       /* phys for the controller */
+       struct phy              *phy2_gen;
+       struct phy              *phy3_gen;
 };

I don't think adding new variables here and restricting most of this
logic to xhci-plat.c (in the next patch) is the best way to do it.
There's no conceptual reason why other host controllers (e.g. xhci-pci
or even EHCI) could not have a similar need to tune their PHY after
reset. PHYs are universal to all host controllers.

There is already a 'phy' member in struct usb_hcd which I think is
mostly unused right now. I think it would be much less
confusing/redundant to reuse that member for this purpose (you could
still set it up from xhci_plat_probe(), and then call it from
hcd_bus_resume() or something like that). Since XHCI host controllers
already conveniently have two struct usb_hcd (one for 2.0 and one for
3.0), you can cleanly store references to your two PHYs in there.

Ok, i will look into the suggested approach, and raise flag in case i
have doubts.



-- 
Best Regards
Vivek Gautam
Samsung R&D Institute, Bangalore
India