[media] lgdt3305: add support for fixed tp clock mode

Add support for controlling TP clock mode for VSB and QAM annex-B/C mode.
Gated clock mode is the default value, and does not support QAM annex-C.
The patch enables setting this control to fixed clock mode.
Signed-off-by: Michael Ira Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/dvb-frontends/lgdt3305.c

@@ -241,6 +241,7 @@ static int lgdt3305_mpeg_mode_polarity(struct lgdt3305_state *state)
 	u8 val;
 	int ret;
 	enum lgdt3305_tp_clock_edge edge = state->cfg->tpclk_edge;
+	enum lgdt3305_tp_clock_mode mode = state->cfg->tpclk_mode;
 	enum lgdt3305_tp_valid_polarity valid = state->cfg->tpvalid_polarity;
 
 	lg_dbg("edge = %d, valid = %d\n", edge, valid);
@@ -253,6 +254,8 @@ static int lgdt3305_mpeg_mode_polarity(struct lgdt3305_state *state)
 
 	if (edge)
 		val |= 0x08;
+	if (mode)
+		val |= 0x40;
 	if (valid)
 		val |= 0x01;
 

drivers/media/dvb-frontends/lgdt3305.h

@@ -37,6 +37,11 @@ enum lgdt3305_tp_clock_edge {
 	LGDT3305_TPCLK_FALLING_EDGE = 1,
 };
 
+enum lgdt3305_tp_clock_mode {
+	LGDT3305_TPCLK_GATED = 0,
+	LGDT3305_TPCLK_FIXED = 1,
+};
+
 enum lgdt3305_tp_valid_polarity {
 	LGDT3305_TP_VALID_LOW = 0,
 	LGDT3305_TP_VALID_HIGH = 1,
@@ -70,6 +75,7 @@ struct lgdt3305_config {
 
 	enum lgdt3305_mpeg_mode mpeg_mode;
 	enum lgdt3305_tp_clock_edge tpclk_edge;
+	enum lgdt3305_tp_clock_mode tpclk_mode;
 	enum lgdt3305_tp_valid_polarity tpvalid_polarity;
 	enum lgdt_demod_chip_type demod_chip;
 };