[PATCH v3 2/5] xhci: Platform: Set Synopsis device disconnection quirk based on platform data

Sneeker Yeh
2015-01-25T08:15:18Z

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

Signed-off-by: Sneeker Yeh <Sneeker.Yeh@tw.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