[media] dvb_frontend: implement suspend / resume

Move initial suspend / resume support from dvb_usb_v2 to dvb_frontend
as it is dvb general feature that could be used all dvb devices.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb-core/dvb_frontend.c

@@ -307,15 +307,6 @@ void dvb_frontend_reinitialise(struct dvb_frontend *fe)
 }
 EXPORT_SYMBOL(dvb_frontend_reinitialise);
 
-void dvb_frontend_retune(struct dvb_frontend *fe)
-{
-	struct dvb_frontend_private *fepriv = fe->frontend_priv;
-
-	fepriv->state = FESTATE_RETUNE;
-	dvb_frontend_wakeup(fe);
-}
-EXPORT_SYMBOL(dvb_frontend_retune);
-
 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
 {
 	int q2;
@@ -2448,6 +2439,44 @@ static const struct file_operations dvb_frontend_fops = {
 	.llseek		= noop_llseek,
 };
 
+int dvb_frontend_suspend(struct dvb_frontend *fe)
+{
+	int ret = 0;
+
+	dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
+			fe->id);
+
+	if (fe->ops.tuner_ops.sleep)
+		ret = fe->ops.tuner_ops.sleep(fe);
+
+	if (fe->ops.sleep)
+		ret = fe->ops.sleep(fe);
+
+	return ret;
+}
+EXPORT_SYMBOL(dvb_frontend_suspend);
+
+int dvb_frontend_resume(struct dvb_frontend *fe)
+{
+	struct dvb_frontend_private *fepriv = fe->frontend_priv;
+	int ret = 0;
+
+	dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
+			fe->id);
+
+	if (fe->ops.init)
+		ret = fe->ops.init(fe);
+
+	if (fe->ops.tuner_ops.init)
+		ret = fe->ops.tuner_ops.init(fe);
+
+	fepriv->state = FESTATE_RETUNE;
+	dvb_frontend_wakeup(fe);
+
+	return ret;
+}
+EXPORT_SYMBOL(dvb_frontend_resume);
+
 int dvb_register_frontend(struct dvb_adapter* dvb,
 			  struct dvb_frontend* fe)
 {

drivers/media/dvb-core/dvb_frontend.h

@@ -418,7 +418,8 @@ extern int dvb_unregister_frontend(struct dvb_frontend *fe);
 extern void dvb_frontend_detach(struct dvb_frontend *fe);
 
 extern void dvb_frontend_reinitialise(struct dvb_frontend *fe);
-extern void dvb_frontend_retune(struct dvb_frontend *fe);
+extern int dvb_frontend_suspend(struct dvb_frontend *fe);
+extern int dvb_frontend_resume(struct dvb_frontend *fe);
 
 extern void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec);
 extern s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime);