[media] drxk: Allow to disable I2C Bridge control switch

On em28xx, tda18271C2 is accessible when the i2c port
is not touched. Touching on it breaks the driver.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

3 files changed, 5 insertions, 0 deletions

diff --git a/drivers/media/dvb/frontends/drxk.h b/drivers/media/dvb/frontends/drxk.h
index dd54512..9c99f31 100644
--- a/drivers/media/dvb/frontends/drxk.h
+++ b/drivers/media/dvb/frontends/drxk.h
@@ -7,6 +7,7 @@
 struct drxk_config {
 	u8 adr;
 	u32 single_master : 1;
+	u32 no_i2c_bridge : 1;
 	const char *microcode_name;
 };
 
diff --git a/drivers/media/dvb/frontends/drxk_hard.c b/drivers/media/dvb/frontends/drxk_hard.c
index adb454a..5233526 100644
--- a/drivers/media/dvb/frontends/drxk_hard.c
+++ b/drivers/media/dvb/frontends/drxk_hard.c
@@ -2784,6 +2784,8 @@ static int ConfigureI2CBridge(struct drxk_state *state, bool bEnableBridge)
 	if (state->m_DrxkState == DRXK_POWERED_DOWN)
 		return -1;
 
+	if (state->no_i2c_bridge)
+		return 0;
 	do {
 		status = write16(state, SIO_HI_RA_RAM_PAR_1__A, SIO_HI_RA_RAM_PAR_1_PAR1_SEC_KEY);
 		if (status < 0)
@@ -6360,6 +6362,7 @@ struct dvb_frontend *drxk_attach(const struct drxk_config *config,
 	state->demod_address = adr;
 	state->single_master = config->single_master;
 	state->microcode_name = config->microcode_name;
+	state->no_i2c_bridge = config->no_i2c_bridge;
 
 	mutex_init(&state->mutex);
 	mutex_init(&state->ctlock);
diff --git a/drivers/media/dvb/frontends/drxk_hard.h b/drivers/media/dvb/frontends/drxk_hard.h
index 8cdadce..b042755 100644
--- a/drivers/media/dvb/frontends/drxk_hard.h
+++ b/drivers/media/dvb/frontends/drxk_hard.h
@@ -330,6 +330,7 @@ struct drxk_state {
 	/* Configurable parameters at the driver */
 
 	u32 single_master : 1;		/* Use single master i2c mode */
+	u32 no_i2c_bridge : 1;		/* Tuner is not on port 1, don't use I2C bridge */
 	const char *microcode_name;
 
 };