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authorMatthias Schwarzott <zzam@gentoo.org>2017-11-05 09:25:09 -0500
committerMauro Carvalho Chehab <mchehab@s-opensource.com>2017-12-12 05:52:58 -0500
commit2e687a6d3da813dea908e55bef325526ce644fea (patch)
treee23be3cb1d73f632e5dd62c56b6db615250991f3 /drivers/media/dvb-frontends
parent964b372740ad5f92c12220ebbb03b04a6cdf0435 (diff)
media: si2165: add DVBv3 wrapper for C/N statistics
Add read_snr function that reads from property cache to support DVBv3. Signed-off-by: Matthias Schwarzott <zzam@gentoo.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/media/dvb-frontends')
-rw-r--r--drivers/media/dvb-frontends/si2165.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/si2165.c b/drivers/media/dvb-frontends/si2165.c
index 1cd2120f5dc4..ceb5a2bb0dea 100644
--- a/drivers/media/dvb-frontends/si2165.c
+++ b/drivers/media/dvb-frontends/si2165.c
@@ -794,6 +794,17 @@ static int si2165_read_status(struct dvb_frontend *fe, enum fe_status *status)
return 0;
}
+static int si2165_read_snr(struct dvb_frontend *fe, u16 *snr)
+{
+ struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+
+ if (c->cnr.stat[0].scale == FE_SCALE_DECIBEL)
+ *snr = div_s64(c->cnr.stat[0].svalue, 100);
+ else
+ *snr = 0;
+ return 0;
+}
+
static int si2165_set_oversamp(struct si2165_state *state, u32 dvb_rate)
{
u64 oversamp;
@@ -1111,6 +1122,7 @@ static const struct dvb_frontend_ops si2165_ops = {
.set_frontend = si2165_set_frontend,
.read_status = si2165_read_status,
+ .read_snr = si2165_read_snr,
};
static int si2165_probe(struct i2c_client *client,