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V4L/DVB (7380): tuner-simple: warn if tuner can't be probed during attach

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Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Michael Krufky 2008-04-22 14:46:05 -03:00 • committed by Mauro Carvalho Chehab
parent cac2b0eb18
commit e827931e37
1 changed files with 22 additions and 0 deletions
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22
drivers/media/video/tuner-simple.c
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@ -987,6 +987,28 @@ struct dvb_frontend *simple_tuner_attach(struct dvb_frontend *fe,
return NULL; 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); mutex_lock(&tuner_simple_list_mutex);
instance = hybrid_tuner_request_state(struct tuner_simple_priv, priv, instance = hybrid_tuner_request_state(struct tuner_simple_priv, priv,