usb: chipidea: add usb as system wakeup source

The USB signal can be system wakeup source, this patch add the
support, for how to enable it, see Documentation/usb/chipidea.txt.
Since USB wakeup enable logic is vendor/platform specific, the
glue layer needs to implement it to support this feature.

Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
index 63d2b398c9a0..6d9dc2d175eb 100644
--- a/drivers/usb/chipidea/core.c
+++ b/drivers/usb/chipidea/core.c
@@ -808,6 +808,8 @@ static int ci_hdrc_probe(struct platform_device *pdev)
         if (ci_otg_is_fsm_mode(ci))
                 ci_hdrc_otg_fsm_start(ci);
 
+        device_set_wakeup_capable(&pdev->dev, true);
+
         ret = dbg_create_files(ci);
         if (!ret)
                 return 0;
@@ -898,6 +900,11 @@ static int ci_suspend(struct device *dev)
                 return 0;
         }
 
+        if (device_may_wakeup(dev)) {
+                usb_phy_set_wakeup(ci->usb_phy, true);
+                enable_irq_wake(ci->irq);
+        }
+
         ci_controller_suspend(ci);
 
         return 0;
@@ -908,6 +915,9 @@ static int ci_resume(struct device *dev)
         struct ci_hdrc *ci = dev_get_drvdata(dev);
         int ret;
 
+        if (device_may_wakeup(dev))
+                disable_irq_wake(ci->irq);
+
         ret = ci_controller_resume(dev);
         if (ret)
                 return ret;