If an xhci platform supports USB3 LPM capability then enable
XHCI_LPM_SUPPORT quirk flag.
Signed-off-by: Pratyush Anand <pratyush.anand@xxxxxx>
---
Documentation/devicetree/bindings/usb/usb-xhci.txt | 2 ++
drivers/usb/host/xhci-plat.c | 6 +++++
include/linux/usb/xhci_pdriver.h | 30 ++++++++++++++++++++++
3 files changed, 38 insertions(+)
create mode 100644 include/linux/usb/xhci_pdriver.h
diff --git a/Documentation/devicetree/bindings/usb/usb-xhci.txt b/Documentation/devicetree/bindings/usb/usb-xhci.txt
index 90f8f60..8e0e248 100644
--- a/Documentation/devicetree/bindings/usb/usb-xhci.txt
+++ b/Documentation/devicetree/bindings/usb/usb-xhci.txt
@@ -5,6 +5,8 @@ Required properties:
- reg: should contain address and length of the standard XHCI
register set for the device.
- interrupts: one XHCI interrupt should be described here.
+Optional properties:
+ - usb3-lpm-capable: determines if platform is USB3 LPM capable
Example:
usb@f0931000 {
diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index d6189a0..d02dc7f 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -16,6 +16,7 @@
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/dma-mapping.h>
+#include <linux/usb/xhci_pdriver.h>
#include "xhci.h"
@@ -90,6 +91,8 @@ static const struct hc_driver xhci_plat_xhci_driver = {
static int xhci_plat_probe(struct platform_device *pdev)
{
+ struct device_node *node = pdev->dev.of_node;
+ struct usb_xhci_pdata *pdata = dev_get_platdata(&pdev->dev);
const struct hc_driver *driver;
struct xhci_hcd *xhci;
struct resource *res;
@@ -155,6 +158,9 @@ static int xhci_plat_probe(struct platform_device *pdev)
goto dealloc_usb2_hcd;
}
+ if ((node && of_property_read_bool(node, "usb3-lpm-capable")) ||
+ (pdata && pdata->usb3_lpm_capable))
+ xhci->quirks |= XHCI_LPM_SUPPORT;
/*
* 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
new file mode 100644
index 0000000..ce9cf56
--- /dev/null
+++ b/include/linux/usb/xhci_pdriver.h
@@ -0,0 +1,30 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef __USB_CORE_XHCI_PDRIVER_H
+#define __USB_CORE_XHCI_PDRIVER_H
+
+/**
+ * struct usb_xhci_pdata - platform_data for generic xhci platform driver
+ *
+ * @usb3_lpm_capable: determines if this xhci platform supports USB3
+ * LPM capability
+ *
+ */
+struct usb_xhci_pdata {
+ unsigned usb3_lpm_capable:1;
+};
+
+#endif /* __USB_CORE_XHCI_PDRIVER_H */
--
1.8.1.2
--
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