usb: s3c-hsudc: add basic runtime_pm calls

This will enable the system to check for activity of the usb gadget
and also in a later patch to control the usbphy power-domain.
When handling the power domain there, it will be possible to remove
another reference to architecture code.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/gadget/s3c-hsudc.c b/drivers/usb/gadget/s3c-hsudc.c
index 41b3a58..5e87293 100644 (file)
--- a/drivers/usb/gadget/s3c-hsudc.c
+++ b/drivers/usb/gadget/s3c-hsudc.c
@@ -30,6 +30,7 @@
 #include <linux/prefetch.h>
 #include <linux/platform_data/s3c-hsudc.h>
 #include <linux/regulator/consumer.h>
+#include <linux/pm_runtime.h>
 
 #include <mach/regs-s3c2443-clock.h>
 
@@ -1178,6 +1179,9 @@ static int s3c_hsudc_start(struct usb_gadget *gadget,
        dev_info(hsudc->dev, "bound driver %s\n", driver->driver.name);
 
        s3c_hsudc_reconfig(hsudc);
+
+       pm_runtime_get_sync(hsudc->dev);
+
        s3c_hsudc_init_phy();
        if (hsudc->pd->gpio_init)
                hsudc->pd->gpio_init();
@@ -1208,6 +1212,9 @@ static int s3c_hsudc_stop(struct usb_gadget *gadget,
        hsudc->gadget.dev.driver = NULL;
        hsudc->gadget.speed = USB_SPEED_UNKNOWN;
        s3c_hsudc_uninit_phy();
+
+       pm_runtime_put(hsudc->dev);
+
        if (hsudc->pd->gpio_uninit)
                hsudc->pd->gpio_uninit();
        s3c_hsudc_stop_activity(hsudc);
@@ -1362,6 +1369,8 @@ static int __devinit s3c_hsudc_probe(struct platform_device *pdev)
        if (ret)
                goto err_add_udc;
 
+       pm_runtime_enable(dev);
+
        return 0;
 err_add_udc:
        device_unregister(&hsudc->gadget.dev);