[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>
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0f314f6c2e
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61d7c6aa4f
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@ -28,8 +28,9 @@ static int mn88472_read_status(struct dvb_frontend *fe, enum fe_status *status)
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struct i2c_client *client = fe->demodulator_priv;
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struct mn88472_dev *dev = i2c_get_clientdata(client);
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struct dtv_frontend_properties *c = &fe->dtv_property_cache;
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int ret;
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unsigned int utmp;
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int ret, i;
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unsigned int utmp, utmp1;
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u8 buf[2];
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if (!dev->active) {
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ret = -EAGAIN;
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@ -77,6 +78,24 @@ static int mn88472_read_status(struct dvb_frontend *fe, enum fe_status *status)
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goto err;
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}
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/* Signal strength */
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if (*status & FE_HAS_SIGNAL) {
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for (i = 0; i < 2; i++) {
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ret = regmap_bulk_read(dev->regmap[2], 0x8e + i,
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&buf[i], 1);
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if (ret)
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goto err;
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}
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utmp1 = buf[0] << 8 | buf[1] << 0 | buf[0] >> 2;
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dev_dbg(&client->dev, "strength=%u\n", utmp1);
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c->strength.stat[0].scale = FE_SCALE_RELATIVE;
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c->strength.stat[0].uvalue = utmp1;
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} else {
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c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
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}
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return 0;
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err:
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dev_dbg(&client->dev, "failed=%d\n", ret);
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@ -462,6 +481,7 @@ static int mn88472_probe(struct i2c_client *client,
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{
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struct mn88472_config *pdata = client->dev.platform_data;
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struct mn88472_dev *dev;
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struct dtv_frontend_properties *c;
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int ret;
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unsigned int utmp;
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static const struct regmap_config regmap_config = {
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@ -547,6 +567,10 @@ static int mn88472_probe(struct i2c_client *client,
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*pdata->fe = &dev->fe;
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i2c_set_clientdata(client, dev);
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/* Init stats to indicate which stats are supported */
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c = &dev->fe.dtv_property_cache;
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c->strength.len = 1;
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/* Setup callbacks */
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pdata->get_dvb_frontend = mn88472_get_dvb_frontend;
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