Hi, On Fri, Apr 01, 2016 at 10:45:47PM +0300, Sergei Shtylyov wrote: > On 04/01/2016 07:02 PM, David Lechner wrote: > > >>>>+EXPORT_SYMBOL_GPL(da8xx_usb20_phy_set_mode); > >>> > >>>Don't prefer export symbols from PHY driver. That'll create unnecessary > >>>dependencies between the controller and the PHY. > >> > >>Agreed. > >> > >>>I think it'll be better to create a new attribute and use it? > >> > >>Another simpler option is to not support _set_mode() for DA8xx, and the > >>phy driver set the otgmode bit in probe() based on dr_mode of the > >>controller. > >> > >>Regards, > >>-Bin. > > > >This certainly works for my particular use case, however, Sergei Shtylyov, > >who > >wrote the da8xx musb glue layer originally, seemed to recall in his review of > >the patch series that this really is necessary for OTG mode to work properly. > > No, it's still not necessary, however this method is now called > from musb_init_controller() (it wasn't in my time). ISTR however > that you needed to enforce the mode override in CFGCHIP2 for the > host mode to function properly.
Yes, but I think we don't have to rely on musb_init_controller(), what we can do is the phy probe() calls of_usb_get_dr_mode_by_phy() to get the dr_mode of the controller then sets CFGCHIP2 bits accordingly, so that we can drop _set_mode() in the phy driver. Regards, -Bin. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
