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Commit c036019e authored by Pavankumar Kondeti's avatar Pavankumar Kondeti Committed by Greg Kroah-Hartman
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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: default avatarPavankumar Kondeti <pkondeti@codeaurora.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 33f82f38

drivers/usb/gadget/ci13xxx_udc.c

+10 −0
Original line number Diff line number Diff line
@@ -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;