diff options
| -rw-r--r-- | Documentation/devicetree/bindings/usb/usb-xhci.txt | 3 | ||||
| -rw-r--r-- | drivers/usb/host/xhci-plat.c | 6 | ||||
| -rw-r--r-- | include/linux/usb/xhci_pdriver.h | 27 |
3 files changed, 36 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/usb/usb-xhci.txt b/Documentation/devicetree/bindings/usb/usb-xhci.txt index 5752df0e17a2..98424d5363e6 100644 --- a/Documentation/devicetree/bindings/usb/usb-xhci.txt +++ b/Documentation/devicetree/bindings/usb/usb-xhci.txt @@ -6,6 +6,9 @@ Required properties: 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 { compatible = "xhci-platform"; diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c index ab1b6d8d2fc4..874dede5b8e8 100644 --- a/drivers/usb/host/xhci-plat.c +++ b/drivers/usb/host/xhci-plat.c @@ -16,6 +16,7 @@ #include <linux/of.h> #include <linux/platform_device.h> #include <linux/slab.h> +#include <linux/usb/xhci_pdriver.h> #include "xhci.h" @@ -87,6 +88,8 @@ 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; @@ -152,6 +155,9 @@ 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 000000000000..376654b5b0f7 --- /dev/null +++ b/include/linux/usb/xhci_pdriver.h @@ -0,0 +1,27 @@ +/* + * 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. + * + */ + +#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 */ |