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USB: gadget: Implement runtime PM for ci13xxx gadget 

The actual suspend/resume work is delegated to bus glue driver, which
is responsible for putting hardware in low power mode.

Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Pavankumar Kondeti 2010-12-07 17:54:04 +05:30 committed by Greg Kroah-Hartman
parent 33f82f387b
commit c036019ed2
1 changed files with 10 additions and 0 deletions
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10
drivers/usb/gadget/ci13xxx_udc.c
View File

@ -60,6 +60,7 @@
#include <linux/irq.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/pm_runtime.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <linux/usb/otg.h>
@ -2348,6 +2349,7 @@ static int ci13xxx_vbus_session(struct usb_gadget *_gadget, int is_active)
if (gadget_ready) {
if (is_active) {
pm_runtime_get_sync(&_gadget->dev);
hw_device_reset(udc);
hw_device_state(udc->ci13xxx_ep[0].qh[RX].dma);
} else {
@ -2356,6 +2358,7 @@ static int ci13xxx_vbus_session(struct usb_gadget *_gadget, int is_active)
udc->udc_driver->notify_event(udc,
CI13XXX_CONTROLLER_STOPPED_EVENT);
_gadget_stop_activity(&udc->gadget);
pm_runtime_put_sync(&_gadget->dev);
}
}
@ -2473,16 +2476,20 @@ int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
goto done;
}
pm_runtime_get_sync(&udc->gadget.dev);
if (udc->udc_driver->flags & CI13XXX_PULLUP_ON_VBUS) {
if (udc->vbus_active) {
if (udc->udc_driver->flags & CI13XXX_REGS_SHARED)
hw_device_reset(udc);
} else {
pm_runtime_put_sync(&udc->gadget.dev);
goto done;
}
}
retval = hw_device_state(udc->ci13xxx_ep[0].qh[RX].dma);
if (retval)
pm_runtime_put_sync(&udc->gadget.dev);
done:
spin_unlock_irqrestore(udc->lock, flags);
@ -2522,6 +2529,7 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
udc->udc_driver->notify_event(udc,
CI13XXX_CONTROLLER_STOPPED_EVENT);
_gadget_stop_activity(&udc->gadget);
pm_runtime_put(&udc->gadget.dev);
}
/* unbind gadget */
@ -2723,6 +2731,8 @@ static int udc_probe(struct ci13xxx_udc_driver *driver, struct device *dev,
if (retval)
goto remove_dbg;
}
pm_runtime_no_callbacks(&udc->gadget.dev);
pm_runtime_enable(&udc->gadget.dev);
_udc = udc;
return retval;