OK, updated patch attached; this one will try and read a byte from the PLL
chip using normal i2c to check it is there.
diff -r fff6e39edcb0 linux/drivers/media/dvb/frontends/dvb-pll.c
--- a/linux/drivers/media/dvb/frontends/dvb-pll.c Wed Jun 28 15:27:45 2006 -0300
+++ b/linux/drivers/media/dvb/frontends/dvb-pll.c Wed Jun 28 21:04:41 2006 +0100
@@ -613,7 +613,20 @@ static struct dvb_tuner_ops dvb_pll_tune
int dvb_pll_attach(struct dvb_frontend *fe, int pll_addr, struct i2c_adapter *i2c, struct dvb_pll_desc *desc)
{
+ u8 b1 [] = { 0 };
+ struct i2c_msg msg [] = { { .addr = pll_addr, .flags = 0, .buf = NULL, .len = 0 },
+ { .addr = pll_addr, .flags = I2C_M_RD, .buf = b1, .len = 1 } };
struct dvb_pll_priv *priv = NULL;
+ int ret;
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 1);
+
+ ret = i2c_transfer (i2c, msg, 2);
+ if (ret != 2)
+ return -1;
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 0);
priv = kzalloc(sizeof(struct dvb_pll_priv), GFP_KERNEL);
if (priv == NULL)
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