Hi Felipe-san, > From: Felipe Balbi, Sent: Thursday, July 26, 2018 7:58 PM > > Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx> writes: > > > This patch adds role switch support for R-Car SoCs into the USB 3.0 > > peripheral driver. Some R-Car SoCs (e.g. R-Car H3) have USB 3.0 > > dual-role device controller which has the USB 3.0 xHCI host and > > Renesas USB 3.0 peripheral. > > > > Unfortunately, the mode change register (DRD_CON) contains > > the USB 3.0 peripheral controller side only. So, this renesas_usb3 > > driver manages the DRD_CON now. However, in peripheral mode, the host > > should stop. Also the host hardware needs to reinitialize its own > > registers when the mode changes from peripheral to host mode. > > Otherwise, the host cannot work correctly (e.g. detect a device > > as high-speed). > > > > To achieve this reinitialization by a driver, this driver also > > registers a role switch driver to manage the DRD_CON and get > > a device pointer of usb 3.0 host from "companion" property of OF. > > Then, when the usb role is changed, renesas_usb3_role_switch_set() > > will attach/release the xhci-plat driver to reinitialize the host > > hardware. > > > > Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx> > > unfortunately doesn't apply: Oops! I will rebase this patch and submit a patch as v7 soon. Best regards, Yoshihiro Shimoda -- 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
