提交 e827931e 编写于 作者: M Michael Krufky 提交者: Mauro Carvalho Chehab

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

Signed-off-by: NMichael Krufky <mkrufky@linuxtv.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>
上级 cac2b0eb
......@@ -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,
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册