Hi Felipe, On Thu, May 07, 2015 at 08:31:53AM -0500, Felipe Balbi wrote: > On Thu, May 07, 2015 at 03:38:50PM +0300, Laurentiu Palcu wrote: > > Hi list, > > > > I'm working on a driver for a charger chip that also supports boost > > mode (supply power on VBUS in order to charge other devices). However, > > I'm not really sure what's the proper way to detect that we're in host > > mode or device mode in order to switch boost mode on. > > > > I saw some charger drivers register a notifier with the usb_phy and > > check for USB_EVENT_ID event. According to OTG specifications, if the ID > > pin is grounded the initial role should be host mode. But, not all USB > > PHY drivers throw this event. In fact, I only found one driver that does > > that: omap2430.c. > > > > Is there a more robust/generic way? > > that should be the correct event to listen to, at least as of now. > USB Charging in Linux hasn't seen a lot of love lately, I'm afraid. Thanks, I'll use USB_EVENT_ID event then. laurentiu -- 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
