[PATCH 1/2] si2157: Add support for spectrum inversion

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This is needed for PCTV 522e support.
Modify all users of si2157_config to correctly initialize all not
mentioned values to 0.

Signed-off-by: Matthias Schwarzott <zzam@xxxxxxxxxx>
---
 drivers/media/tuners/si2157.c         | 3 +++
 drivers/media/tuners/si2157.h         | 5 +++++
 drivers/media/tuners/si2157_priv.h    | 1 +
 drivers/media/usb/dvb-usb/cxusb.c     | 3 +--
 drivers/media/usb/em28xx/em28xx-dvb.c | 5 +++--
 5 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/drivers/media/tuners/si2157.c b/drivers/media/tuners/si2157.c
index 329004f..4dbd3f1 100644
--- a/drivers/media/tuners/si2157.c
+++ b/drivers/media/tuners/si2157.c
@@ -253,6 +253,8 @@ static int si2157_set_params(struct dvb_frontend *fe)
 
 	memcpy(cmd.args, "\x14\x00\x03\x07\x00\x00", 6);
 	cmd.args[4] = delivery_system | bandwidth;
+	if (s->inversion)
+		cmd.args[5] = 0x01;
 	cmd.wlen = 6;
 	cmd.rlen = 1;
 	ret = si2157_cmd_execute(s, &cmd);
@@ -307,6 +309,7 @@ static int si2157_probe(struct i2c_client *client,
 
 	s->client = client;
 	s->fe = cfg->fe;
+	s->inversion = cfg->inversion;
 	mutex_init(&s->i2c_mutex);
 
 	/* check if the tuner is there */
diff --git a/drivers/media/tuners/si2157.h b/drivers/media/tuners/si2157.h
index 4465c46..6da4d5d 100644
--- a/drivers/media/tuners/si2157.h
+++ b/drivers/media/tuners/si2157.h
@@ -29,6 +29,11 @@ struct si2157_config {
 	 * frontend
 	 */
 	struct dvb_frontend *fe;
+
+	/*
+	 * Spectral Inversion
+	 */
+	bool inversion;
 };
 
 #endif
diff --git a/drivers/media/tuners/si2157_priv.h b/drivers/media/tuners/si2157_priv.h
index db79f3c..3ddab5e 100644
--- a/drivers/media/tuners/si2157_priv.h
+++ b/drivers/media/tuners/si2157_priv.h
@@ -26,6 +26,7 @@ struct si2157 {
 	struct i2c_client *client;
 	struct dvb_frontend *fe;
 	bool active;
+	bool inversion;
 };
 
 /* firmare command struct */
diff --git a/drivers/media/usb/dvb-usb/cxusb.c b/drivers/media/usb/dvb-usb/cxusb.c
index ad20c39..c94a704 100644
--- a/drivers/media/usb/dvb-usb/cxusb.c
+++ b/drivers/media/usb/dvb-usb/cxusb.c
@@ -1337,7 +1337,7 @@ static int cxusb_tt_ct2_4400_attach(struct dvb_usb_adapter *adap)
 	struct i2c_client *client_tuner;
 	struct i2c_board_info info;
 	struct si2168_config si2168_config;
-	struct si2157_config si2157_config;
+	struct si2157_config si2157_config = { .fe = adap->fe_adap[0].fe };
 
 	/* reset the tuner */
 	if (cxusb_tt_ct2_4400_gpio_tuner(d, 0) < 0) {
@@ -1371,7 +1371,6 @@ static int cxusb_tt_ct2_4400_attach(struct dvb_usb_adapter *adap)
 	st->i2c_client_demod = client_demod;
 
 	/* attach tuner */
-	si2157_config.fe = adap->fe_adap[0].fe;
 	memset(&info, 0, sizeof(struct i2c_board_info));
 	strlcpy(info.type, "si2157", I2C_NAME_SIZE);
 	info.addr = 0x60;
diff --git a/drivers/media/usb/em28xx/em28xx-dvb.c b/drivers/media/usb/em28xx/em28xx-dvb.c
index a121ed9..d472dc9 100644
--- a/drivers/media/usb/em28xx/em28xx-dvb.c
+++ b/drivers/media/usb/em28xx/em28xx-dvb.c
@@ -1520,7 +1520,9 @@ static int em28xx_dvb_init(struct em28xx *dev)
 			struct i2c_client *client;
 			struct i2c_board_info info;
 			struct si2168_config si2168_config;
-			struct si2157_config si2157_config;
+			struct si2157_config si2157_config = {
+				.fe = dvb->fe[0]
+			};
 
 			/* attach demod */
 			si2168_config.i2c_adapter = &adapter;
@@ -1545,7 +1547,6 @@ static int em28xx_dvb_init(struct em28xx *dev)
 			dvb->i2c_client_demod = client;
 
 			/* attach tuner */
-			si2157_config.fe = dvb->fe[0];
 			memset(&info, 0, sizeof(struct i2c_board_info));
 			strlcpy(info.type, "si2157", I2C_NAME_SIZE);
 			info.addr = 0x60;
-- 
2.0.0

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