linux-kernel - [PATCH 2/4] usb: host: xhci: Introduce one new 'usb3_slow

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Message-Id: <a1dd24f8779c3f65a07622275abebdf4729ddd56.1468571634.git.baolin.wang@linaro.org>
Date:	Fri, 15 Jul 2016 17:13:26 +0800
From:	Baolin Wang <baolin.wang@...aro.org>
To:	balbi@...nel.org, gregkh@...uxfoundation.org
Cc:	mathias.nyman@...el.com, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, broonie@...nel.org,
	baolin.wang@...aro.org
Subject: [PATCH 2/4] usb: host: xhci: Introduce one new 'usb3_slow_suspend' member for xhci private data

Now some usb controllers (such as dwc3 controller) need 'XHCI_SLOW_SUSPEND'
quirk when suspending the xhci, thus we need to add 'usb3_slow_suspend' member
in xhci platform data to support this.

Signed-off-by: Baolin Wang <baolin.wang@...aro.org>
---
 drivers/usb/host/xhci-plat.c     |    3 +++
 include/linux/usb/xhci_pdriver.h |    3 +++
 2 files changed, 6 insertions(+)

diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index e2e2487..162f17c 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -250,6 +250,9 @@ static int xhci_plat_probe(struct platform_device *pdev)
 			(pdata && pdata->usb3_lpm_capable))
 		xhci->quirks |= XHCI_LPM_SUPPORT;
 
+	if (pdata && pdata->usb3_slow_suspend)
+		xhci->quirks |= XHCI_SLOW_SUSPEND;
+
 	return 0;
 
 
diff --git a/include/linux/usb/xhci_pdriver.h b/include/linux/usb/xhci_pdriver.h
index 376654b..1276de1 100644
--- a/include/linux/usb/xhci_pdriver.h
+++ b/include/linux/usb/xhci_pdriver.h
@@ -18,10 +18,13 @@
  *
  * @usb3_lpm_capable:	determines if this xhci platform supports USB3
  *			LPM capability
+ * @usb3_slow_suspend:	determines if it need an extraordinary delay when
+ *			suspending xhci.
  *
  */
 struct usb_xhci_pdata {
 	unsigned	usb3_lpm_capable:1;
+	unsigned	usb3_slow_suspend:1;
 };
 
 #endif /* __USB_CORE_XHCI_PDRIVER_H */
-- 
1.7.9.5