[media] fc0012: enable clock output on attach()

We need feed clock to slave demodulator at the very beginning
in case of dual tuner configuration.
I am not sure if that configuration changes clock output divider
or enable clock output itself...
Signed-off-by: Antti Palosaari <crope@iki.fi>
Acked-by: Hans-Frieder Vogt <hfvogt@gmx.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/tuners/fc0012.c

@@ -460,6 +460,13 @@ struct dvb_frontend *fc0012_attach(struct dvb_frontend *fe,
 	if (priv->cfg->loop_through)
 		fc0012_writereg(priv, 0x09, 0x6f);
 
+	/*
+	 * TODO: Clock out en or div?
+	 * For dual tuner configuration clearing bit [0] is required.
+	 */
+	if (priv->cfg->clock_out)
+		fc0012_writereg(priv, 0x0b, 0x82);
+
 	memcpy(&fe->ops.tuner_ops, &fc0012_tuner_ops,
 		sizeof(struct dvb_tuner_ops));
 

drivers/media/tuners/fc0012.h

@@ -41,6 +41,11 @@ struct fc0012_config {
 	 * RF loop-through
 	 */
 	bool loop_through;
+
+	/*
+	 * clock output
+	 */
+	bool clock_out;
 };
 
 #if defined(CONFIG_MEDIA_TUNER_FC0012) || \