V4L/DVB (13975): [STV090x] Added internal structure with shared settings and data.

As the STV0900 features two demodulation paths in one chip there is
some information used by both instances of the driver when used in
dual mode. This information is now shared in an internal structure
referenced by I2C adapter and address.

Do initialisation of the demodulator only once when used in dual mode.
Moved global mutex demod_lock to internal structure.
Moved dev_ver and mclk to internal structure.
Removed unused tuner_refclk from stv090x_state.
Signed-off-by: Andreas Regel <andreas.regel@gmx.de>
Signed-off-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb/frontends/stv090x.h

@@ -68,8 +68,6 @@ struct stv090x_config {
 	u32 xtal; /* default: 8000000 */
 	u8 address; /* default: 0x68 */
 
-	u32 ref_clk; /* default: 16000000 FIXME to tuner config */
-
 	u8 ts1_mode;
 	u8 ts2_mode;
 

drivers/media/dvb/frontends/stv090x_priv.h

@@ -230,11 +230,22 @@ struct stv090x_tab {
 	s32 read;
 };
 
+struct stv090x_internal {
+	struct i2c_adapter 	*i2c_adap;
+	u8			i2c_addr;
+
+	struct mutex		demod_lock; /* Lock access to shared register */
+	s32			mclk; /* Masterclock Divider factor */
+	u32			dev_ver;
+
+	int			num_used;
+};
+
 struct stv090x_state {
 	enum stv090x_device		device;
 	enum stv090x_demodulator	demod;
 	enum stv090x_mode		demod_mode;
-	u32				dev_ver;
+	struct stv090x_internal		*internal;
 
 	struct i2c_adapter		*i2c;
 	const struct stv090x_config	*config;
@@ -256,11 +267,8 @@ struct stv090x_state {
 	u32				frequency;
 	u32				srate;
 
-	s32				mclk; /* Masterclock Divider factor */
 	s32				tuner_bw;
 
-	u32				tuner_refclk;
-
 	s32				search_range;
 
 	s32				DemodTimeout;

drivers/media/dvb/ttpci/budget.c

@@ -435,7 +435,6 @@ static struct stv090x_config tt1600_stv090x_config = {
 
 	.xtal			= 27000000,
 	.address		= 0x68,
-	.ref_clk		= 27000000,
 
 	.ts1_mode		= STV090x_TSMODE_DVBCI,
 	.ts2_mode		= STV090x_TSMODE_SERIAL_CONTINUOUS,