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xhci: Platform: Set xhci lpm support quirk based on platform data

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If an xhci platform supports USB3 LPM capability then enable
XHCI_LPM_SUPPORT quirk flag.

Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Pratyush Anand 2014-07-04 17:01:25 +03:00 committed by Greg Kroah-Hartman
parent 94ef3d5042
commit 20f6fdd01c
3 changed files with 35 additions and 1 deletions
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3
Documentation/devicetree/bindings/usb/usb-xhci.txt
View File

@ -9,8 +9,9 @@ Required properties:
register set for the device.
- interrupts: one XHCI interrupt should be described here.
Optional property:
Optional properties:
- clocks: reference to a clock
- usb3-lpm-capable: determines if platform is USB3 LPM capable
Example:
usb@f0931000 {

6
drivers/usb/host/xhci-plat.c
View File

@ -17,6 +17,7 @@
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/usb/xhci_pdriver.h>
#include "xhci.h"
#include "xhci-mvebu.h"
@ -97,6 +98,8 @@ 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;
@ -185,6 +188,9 @@ 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().

27
include/linux/usb/xhci_pdriver.h Normal file
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@ -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 */