V4L/DVB (12863): tda18271: add new standby mode: slave tuner output / loop thru on

Add new standby mode:
TDA18271_STANDBY_LT_ON = slave tuner output loop thru on w/ xtal osc off

Signed-off-by: Michael Krufky <mkrufky@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/common/tuners/tda18271-fe.c

@@ -1026,6 +1026,10 @@ static int tda18271_sleep(struct dvb_frontend *fe)
 		tda_dbg("standby mode: xtal oscillator on\n");
 		ret = tda18271_set_standby_mode(fe, 1, 1, 0);
 		break;
+	case TDA18271_STANDBY_LT_ON:
+		tda_dbg("standby mode: slave tuner output / loop thru on\n");
+		ret = tda18271_set_standby_mode(fe, 1, 0, 1);
+		break;
 	case TDA18271_STANDBY_LT_XT_ON:
 	default:
 		tda_dbg("standby mode: loop thru & xtal oscillator on\n");

drivers/media/common/tuners/tda18271.h

@@ -74,6 +74,9 @@ enum tda18271_standby_mode {
 	/* xtal oscillator on */
 	TDA18271_STANDBY_XT_ON,
 
+	/* slave tuner output / loop thru on */
+	TDA18271_STANDBY_LT_ON,
+
 	/* power off */
 	TDA18271_STANDBY_POWER_OFF,
 };