linux-kernel - [PATCH v7 1/3] xhci: Add hub_control to xhci_driver

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Date:   Fri, 11 Nov 2022 18:18:11 +0800
From:   Jim Lin <jilin@...dia.com>
To:     <thierry.reding@...il.com>, <gregkh@...uxfoundation.org>,
        <jonathanh@...dia.com>
CC:     <mathias.nyman@...el.com>, <linux-usb@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-tegra@...r.kernel.org>,
        Jim Lin <jilin@...dia.com>
Subject: [PATCH v7 1/3] 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: Jim Lin <jilin@...dia.com>

---
v5: new change
v6: adjust parameter alignment (xhci.h hub_control)
v7: change commit message

 drivers/usb/host/xhci.c | 2 ++
 drivers/usb/host/xhci.h | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 902f410874e8..3c7bf0a0e0b4 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -5461,6 +5461,8 @@ 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);
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 5a75fe563123..f51b674fc10c 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -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
-- 
2.17.1