From 2e687a6d3da813dea908e55bef325526ce644fea Mon Sep 17 00:00:00 2001
From: Matthias Schwarzott <zzam@gentoo.org>
Date: Sun, 5 Nov 2017 09:25:09 -0500
Subject: [PATCH] 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>
---
drivers/media/dvb-frontends/si2165.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
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,