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-rw-r--r--drivers/media/video/tuner-simple.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/media/video/tuner-simple.c b/drivers/media/video/tuner-simple.c
index b95ed1f489a..07007d67d45 100644
--- a/drivers/media/video/tuner-simple.c
+++ b/drivers/media/video/tuner-simple.c
@@ -987,6 +987,28 @@ struct dvb_frontend *simple_tuner_attach(struct dvb_frontend *fe,
return NULL;
}
+ /* If i2c_adap is set, check that the tuner is at the correct address.
+ * Otherwise, if i2c_adap is NULL, the tuner will be programmed directly
+ * by the digital demod via calc_regs.
+ */
+ if (i2c_adap != NULL) {
+ u8 b[1];
+ struct i2c_msg msg = {
+ .addr = i2c_addr, .flags = I2C_M_RD,
+ .buf = b, .len = 1,
+ };
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 1);
+
+ if (1 != i2c_transfer(i2c_adap, &msg, 1))
+ tuner_warn("unable to probe %s, proceeding anyway.",
+ tuners[type].name);
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 0);
+ }
+
mutex_lock(&tuner_simple_list_mutex);
instance = hybrid_tuner_request_state(struct tuner_simple_priv, priv,