diff options
| author | Antti Palosaari <crope@iki.fi> | 2017-03-17 12:43:06 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2017-04-10 12:43:12 -0300 |
| commit | 61d7c6aa4fc1e0b8d6696e1253a242f5de296b9a (patch) | |
| tree | 0ad432a510c08c2584663ce540dc7590093a2b63 | |
| parent | 0f314f6c2e77beb1a232be21dd6be4e1849ba5ac (diff) | |
| download | linux-61d7c6aa4fc1e0b8d6696e1253a242f5de296b9a.tar.bz2 | |
[media] mn88472: implement signal strength statistics
Implement DVBv5 signal strength on relative scale.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
| -rw-r--r-- | drivers/media/dvb-frontends/mn88472.c | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/drivers/media/dvb-frontends/mn88472.c b/drivers/media/dvb-frontends/mn88472.c index 29dd13b36c28..25dd7429a891 100644 --- a/drivers/media/dvb-frontends/mn88472.c +++ b/drivers/media/dvb-frontends/mn88472.c @@ -28,8 +28,9 @@ static int mn88472_read_status(struct dvb_frontend *fe, enum fe_status *status) struct i2c_client *client = fe->demodulator_priv; struct mn88472_dev *dev = i2c_get_clientdata(client); struct dtv_frontend_properties *c = &fe->dtv_property_cache; - int ret; - unsigned int utmp; + int ret, i; + unsigned int utmp, utmp1; + u8 buf[2]; if (!dev->active) { ret = -EAGAIN; @@ -77,6 +78,24 @@ static int mn88472_read_status(struct dvb_frontend *fe, enum fe_status *status) goto err; } + /* Signal strength */ + if (*status & FE_HAS_SIGNAL) { + for (i = 0; i < 2; i++) { + ret = regmap_bulk_read(dev->regmap[2], 0x8e + i, + &buf[i], 1); + if (ret) + goto err; + } + + utmp1 = buf[0] << 8 | buf[1] << 0 | buf[0] >> 2; + dev_dbg(&client->dev, "strength=%u\n", utmp1); + + c->strength.stat[0].scale = FE_SCALE_RELATIVE; + c->strength.stat[0].uvalue = utmp1; + } else { + c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + } + return 0; err: dev_dbg(&client->dev, "failed=%d\n", ret); @@ -462,6 +481,7 @@ static int mn88472_probe(struct i2c_client *client, { struct mn88472_config *pdata = client->dev.platform_data; struct mn88472_dev *dev; + struct dtv_frontend_properties *c; int ret; unsigned int utmp; static const struct regmap_config regmap_config = { @@ -547,6 +567,10 @@ static int mn88472_probe(struct i2c_client *client, *pdata->fe = &dev->fe; i2c_set_clientdata(client, dev); + /* Init stats to indicate which stats are supported */ + c = &dev->fe.dtv_property_cache; + c->strength.len = 1; + /* Setup callbacks */ pdata->get_dvb_frontend = mn88472_get_dvb_frontend; |