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>

diff --git a/drivers/media/dvb/frontends/tda826x.c b/drivers/media/dvb/frontends/tda826x.c
index 4f01d7b..79f971d 100644 (file)
--- a/drivers/media/dvb/frontends/tda826x.c
+++ b/drivers/media/dvb/frontends/tda826x.c
@@ -132,18 +132,21 @@ struct dvb_frontend *tda826x_attach(struct dvb_frontend *fe, int addr, struct i2
 {
        struct tda826x_priv *priv = NULL;
        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;
 
        dprintk("%s:\n", __FUNCTION__);
 
        if (fe->ops.i2c_gate_ctrl)
                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)
                fe->ops.i2c_gate_ctrl(fe, 0);
 
-       if (ret != 1)
+       if (ret != 2)
                return NULL;
        if (!(b1[1] & 0x80))
                return NULL;