Commit 592338dd authored by Jim Lin's avatar Jim Lin Committed by Greg Kroah-Hartman
Browse files

xhci: Add hub_control to xhci_driver_overrides 



Add a hub_control() callback to the xhci_driver_overrides structure to
allow host drivers to override the default hub_control function. This
is required for Tegra which requires device specific actions for power
management to be executed during USB state transitions.

Signed-off-by: default avatarJim Lin <jilin@nvidia.com>
Reviewed-by: default avatarJon Hunter <jonathanh@nvidia.com>
Tested-by: default avatarJon Hunter <jonathanh@nvidia.com>
Acked-by: default avatarThierry Reding <treding@nvidia.com>
Acked-by: default avatarMathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20221111101813.32482-2-jilin@nvidia.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent ee0e40ef

drivers/usb/host/xhci.c

+2 −0
Original line number Diff line number Diff line
@@ -5502,6 +5502,8 @@ void xhci_init_driver(struct hc_driver *drv, 
			drv->check_bandwidth = over->check_bandwidth;

		if (over->reset_bandwidth)

			drv->reset_bandwidth = over->reset_bandwidth;

		if (over->hub_control)

			drv->hub_control = over->hub_control;

	}

}

EXPORT_SYMBOL_GPL(xhci_init_driver);

drivers/usb/host/xhci.h

+2 −0
Original line number Diff line number Diff line
@@ -1943,6 +1943,8 @@ struct xhci_driver_overrides { 
			     struct usb_host_endpoint *ep);

	int (*check_bandwidth)(struct usb_hcd *, struct usb_device *);

	void (*reset_bandwidth)(struct usb_hcd *, struct usb_device *);

	int (*hub_control)(struct usb_hcd *hcd, u16 typeReq, u16 wValue,

			   u16 wIndex, char *buf, u16 wLength);

};



#define	XHCI_CFC_DELAY		10