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authorGeorge Cherian <george.cherian@ti.com>2013-12-17 18:47:54 +0530
committerFelipe Balbi <balbi@ti.com>2014-11-03 10:00:58 -0600
commit7ee2566ff53e0620a80548689c74505fe8f10ec8 (patch)
tree851568ae53eed39a8b5016515b02e5e7ff57cbfc /drivers/usb/dwc3
parent1803fe15ad54e68aae8b2b44e04a635e9b5d52f2 (diff)
usb: dwc3: dwc3-omap: get rid of ->prepare()/->complete()
Enabling the core interrupts in complete is too late for XHCI, and stops it from proper operation. The root of the problem is due to a disagreement between dwc3-omap and XHCI about when IRQs should be enabled. As it turns out, ->resume's documentation states that: "... generally the driver is expected to start working again, responding to hardware events and software requests (the device itself may be left in a low-power state, waiting for a runtime resume to occur) ..." From that we infer that IRQs must be unmasked by the end of ->resume(). Due to that, we will remove ->prepare() and ->complete() and disable/enable interrupts in ->suspend()/->resume(). Acked-by: Roger Quadros <rogerq@ti.com> Signed-off-by: George Cherian <george.cherian@ti.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/dwc3')
-rw-r--r--drivers/usb/dwc3/dwc3-omap.c20
1 files changed, 2 insertions, 18 deletions
diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c
index a0aa9f3da441..172d64e585b6 100644
--- a/drivers/usb/dwc3/dwc3-omap.c
+++ b/drivers/usb/dwc3/dwc3-omap.c
@@ -593,27 +593,12 @@ static const struct of_device_id of_dwc3_match[] = {
MODULE_DEVICE_TABLE(of, of_dwc3_match);
#ifdef CONFIG_PM_SLEEP
-static int dwc3_omap_prepare(struct device *dev)
-{
- struct dwc3_omap *omap = dev_get_drvdata(dev);
-
- dwc3_omap_disable_irqs(omap);
-
- return 0;
-}
-
-static void dwc3_omap_complete(struct device *dev)
-{
- struct dwc3_omap *omap = dev_get_drvdata(dev);
-
- dwc3_omap_enable_irqs(omap);
-}
-
static int dwc3_omap_suspend(struct device *dev)
{
struct dwc3_omap *omap = dev_get_drvdata(dev);
omap->utmi_otg_status = dwc3_omap_read_utmi_status(omap);
+ dwc3_omap_disable_irqs(omap);
return 0;
}
@@ -623,6 +608,7 @@ static int dwc3_omap_resume(struct device *dev)
struct dwc3_omap *omap = dev_get_drvdata(dev);
dwc3_omap_write_utmi_status(omap, omap->utmi_otg_status);
+ dwc3_omap_enable_irqs(omap);
pm_runtime_disable(dev);
pm_runtime_set_active(dev);
@@ -632,8 +618,6 @@ static int dwc3_omap_resume(struct device *dev)
}
static const struct dev_pm_ops dwc3_omap_dev_pm_ops = {
- .prepare = dwc3_omap_prepare,
- .complete = dwc3_omap_complete,
SET_SYSTEM_SLEEP_PM_OPS(dwc3_omap_suspend, dwc3_omap_resume)
};