V4L/DVB (6908): tda8290: add the option not to probe for tuners passed into tda829x_config

Prevent the tda8290 module from probing for tuners during tda829x_attach,
by passing:

.probe_tuner = TDA829X_DONT_PROBE,

...in struct tda829x_config
Signed-off-by: NMichael Krufky <mkrufky@linuxtv.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/tda8290.c

@@ -688,10 +688,17 @@ struct dvb_frontend *tda829x_attach(struct dvb_frontend *fe,
 		       sizeof(struct analog_demod_ops));
 	}
 
-	if (tda829x_find_tuner(fe) < 0)
+	if ((!(cfg) || (TDA829X_PROBE_TUNER == cfg->probe_tuner)) &&
+	    (tda829x_find_tuner(fe) < 0))
 		goto fail;
 
 	switch (priv->ver) {
+	case TDA8290:
+		name = "tda8290";
+		break;
+	case TDA8295:
+		name = "tda8295";
+		break;
 	case TDA8290 | TDA8275:
 		name = "tda8290+75";
 		break;

drivers/media/video/tda8290.h

@@ -23,6 +23,10 @@
 struct tda829x_config {
 	unsigned int *lna_cfg;
 	int (*tuner_callback) (void *dev, int command, int arg);
+
+	unsigned int probe_tuner:1;
+#define TDA829X_PROBE_TUNER 0
+#define TDA829X_DONT_PROBE  1
 };
 
 #if defined(CONFIG_TUNER_TDA8290) || (defined(CONFIG_TUNER_TDA8290_MODULE) && defined(MODULE))