[PATCH 3/3] si2157: Add support for spectral inversion

[Matthias Schwarzott]

This is needed for PCTV 522e support.

Signed-off-by: Matthias Schwarzott <z...@gentoo.org>
---
 drivers/media/tuners/si2157.c      | 3 +++
 drivers/media/tuners/si2157.h      | 5 +++++
 drivers/media/tuners/si2157_priv.h | 1 +
 3 files changed, 9 insertions(+)

diff --git a/drivers/media/tuners/si2157.c b/drivers/media/tuners/si2157.c
index 91808e8..06153fa 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);
@@ -314,6 +316,7 @@ 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 */
-- 
2.0.0

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