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[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>
This commit is contained in:
Antti Palosaari 2017-03-17 12:43:06 -03:00 committed by Mauro Carvalho Chehab
parent 0f314f6c2e
commit 61d7c6aa4f
1 changed files with 26 additions and 2 deletions
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28
drivers/media/dvb-frontends/mn88472.c
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@ -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;