linux-kernel - [PATCH v4 2/5] xhci: Platform: Set Synopsis device disconnection quirk based on platform data

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Message-Id: <1424151697-2084-3-git-send-email-Sneeker.Yeh@tw.fujitsu.com>
Date:	Tue, 17 Feb 2015 13:41:34 +0800
From:	Sneeker Yeh <sneeker.yeh@...il.com>
To:	Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>, Felipe Balbi <balbi@...com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Mathias Nyman <mathias.nyman@...el.com>,
	Grant Likely <grant.likely@...aro.org>,
	Huang Rui <ray.huang@....com>,
	Kishon Vijay Abraham I <kishon@...com>,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-usb@...r.kernel.org, linux-omap@...r.kernel.org
Cc:	Andy Green <andy.green@...aro.org>,
	Jassi Brar <jaswinder.singh@...aro.org>,
	Sneeker Yeh <Sneeker.Yeh@...fujitsu.com>
Subject: [PATCH v4 2/5] xhci: Platform: Set Synopsis device disconnection quirk based on platform data

If an xhci platform has Synopsis device disconnection errata then enable
XHCI_DISCONNECT_QUIRK quirk flag.

Signed-off-by: Sneeker Yeh <Sneeker.Yeh@...fujitsu.com>
---
 drivers/usb/host/xhci-plat.c     |    3 +++
 include/linux/usb/xhci_pdriver.h |    4 ++++
 2 files changed, 7 insertions(+)

diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 08d402b..40beb95 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -147,6 +147,9 @@ static int xhci_plat_probe(struct platform_device *pdev)
 	if ((node && of_property_read_bool(node, "usb3-lpm-capable")) ||
 			(pdata && pdata->usb3_lpm_capable))
 		xhci->quirks |= XHCI_LPM_SUPPORT;
+
+	if (pdata && pdata->delay_portcsc_clear)
+		xhci->quirks |= XHCI_DISCONNECT_QUIRK;
 	/*
 	 * Set the xHCI pointer before xhci_plat_setup() (aka hcd_driver.reset)
 	 * is called by usb_add_hcd().
diff --git a/include/linux/usb/xhci_pdriver.h b/include/linux/usb/xhci_pdriver.h
index 376654b..a37a3a5 100644
--- a/include/linux/usb/xhci_pdriver.h
+++ b/include/linux/usb/xhci_pdriver.h
@@ -18,10 +18,14 @@
  *
  * @usb3_lpm_capable:	determines if this xhci platform supports USB3
  *			LPM capability
+ * @delay_portcsc_clear:	determines if Synopsis USB3 core has errata in
+ *				"DWC_USB3_SUSPEND_ON_DISCONNECT_EN=1" hardware
+ *				configuration.
  *
  */
 struct usb_xhci_pdata {
 	unsigned	usb3_lpm_capable:1;
+	unsigned	delay_portcsc_clear:1;
 };
 
 #endif /* __USB_CORE_XHCI_PDRIVER_H */
-- 
1.7.9.5

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