V4L/DVB (9462): Allow specifying clock per device

Optimizations galore: Blistering barnacles! The KNC1 and friends
like 90 Mhz clock much better rather than running at a higher
throttle, for almost similar hardware. he exact cause unknown,
possibly due to a lower voltage applied for the demod power supply.
Signed-off-by: NManu Abraham <manu@linuxtv.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb/frontends/stb0899_drv.c

@@ -1534,6 +1534,7 @@ static enum dvbfe_search stb0899_search(struct dvb_frontend *fe, struct dvbfe_pa
 	struct stb0899_state *state = fe->demodulator_priv;
 	struct stb0899_params *i_params = &state->params;
 	struct stb0899_internal *internal = &state->internal;
+	struct stb0899_config *config = state->config;
 
 	u32 SearchRange, gain;
 
@@ -1575,9 +1576,9 @@ static enum dvbfe_search stb0899_search(struct dvb_frontend *fe, struct dvbfe_pa
 		}
 
 		if (i_params->srate <= 5000000)
-			stb0899_set_mclk(state, 76500000);
+			stb0899_set_mclk(state, config->lo_clk);
 		else
-			stb0899_set_mclk(state, 99000000);
+			stb0899_set_mclk(state, config->hi_clk);
 
 		switch (state->delsys) {
 		case DVBFE_DELSYS_DVBS:

drivers/media/dvb/frontends/stb0899_drv.h

@@ -117,6 +117,8 @@ struct stb0899_config {
 	u8	out_rate_comp;
 	u8	i2c_repeater;
 //	int	inversion;
+	int	lo_clk;
+	int	hi_clk;
 
 	u32	esno_ave;
 	u32	esno_quant;

drivers/media/dvb/ttpci/budget-av.c

@@ -1127,6 +1127,9 @@ static struct stb0899_config knc1_dvbs2_config = {
 	.xtal_freq		= 27000000,
 	.inversion		= IQ_SWAP_OFF, /* 1 */
 
+	.lo_clk			= 76500000,
+	.hi_clk			= 90000000,
+
 	.esno_ave		= STB0899_DVBS2_ESNO_AVE,
 	.esno_quant		= STB0899_DVBS2_ESNO_QUANT,
 	.avframes_coarse	= STB0899_DVBS2_AVFRAMES_COARSE,

drivers/media/dvb/ttpci/budget-ci.c

@@ -1312,6 +1312,9 @@ static struct stb0899_config tt3200_config = {
 	.xtal_freq		= 27000000,
 	.inversion		= IQ_SWAP_ON, /* 1 */
 
+	.lo_clk			= 76500000,
+	.hi_clk			= 99000000,
+
 	.esno_ave		= STB0899_DVBS2_ESNO_AVE,
 	.esno_quant		= STB0899_DVBS2_ESNO_QUANT,
 	.avframes_coarse	= STB0899_DVBS2_AVFRAMES_COARSE,