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V4L/DVB (4864): TDA826x I2C read with 2 messages 

Added a dump I2C message to the TDA826x-driver to fix I2C read for
identification with ttusb2-driver.

Signed-off-by: Patrick Boettcher <pb@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Patrick Boettcher 2006-11-21 05:35:10 -03:00 committed by Mauro Carvalho Chehab
parent 499c186989
commit 8949f1a242
1 changed files with 6 additions and 3 deletions
drivers/media/dvb/frontends
tda826x.c

9
drivers/media/dvb/frontends/tda826x.c
View File

@ -132,18 +132,21 @@ struct dvb_frontend *tda826x_attach(struct dvb_frontend *fe, int addr, struct i2
{ {
struct tda826x_priv *priv = NULL; struct tda826x_priv *priv = NULL;
u8 b1 [] = { 0, 0 }; u8 b1 [] = { 0, 0 };
struct i2c_msg msg = { .addr = addr, .flags = I2C_M_RD, .buf = b1, .len = 2 }; struct i2c_msg msg[2] = {
{ .addr = addr, .flags = 0, .buf = NULL, .len = 0 },
{ .addr = addr, .flags = I2C_M_RD, .buf = b1, .len = 2 }
};
int ret; int ret;
dprintk("%s:\n", __FUNCTION__); dprintk("%s:\n", __FUNCTION__);
if (fe->ops.i2c_gate_ctrl) if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1); fe->ops.i2c_gate_ctrl(fe, 1);
ret = i2c_transfer (i2c, &msg, 1); ret = i2c_transfer (i2c, msg, 2);
if (fe->ops.i2c_gate_ctrl) if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0); fe->ops.i2c_gate_ctrl(fe, 0);
if (ret != 1) if (ret != 2)
return NULL; return NULL;
if (!(b1[1] & 0x80)) if (!(b1[1] & 0x80))
return NULL; return NULL;