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>
diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci13xxx_udc.c
index c10d1ae..f200e47 100644
--- a/drivers/usb/gadget/ci13xxx_udc.c
+++ b/drivers/usb/gadget/ci13xxx_udc.c
@@ -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 @@
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 @@
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 @@
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 @@
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 @@
if (retval)
goto remove_dbg;
}
+ pm_runtime_no_callbacks(&udc->gadget.dev);
+ pm_runtime_enable(&udc->gadget.dev);
_udc = udc;
return retval;