Implement DVBv5 signal strength on relative scale.
Signed-off-by: Antti Palosaari <crope@xxxxxx>
---
drivers/media/dvb-frontends/mn88472.c | 28 ++++++++++++++++++++++++++--
1 file changed, 26 insertions(+), 2 deletions(-)
diff --git a/drivers/media/dvb-frontends/mn88472.c b/drivers/media/dvb-frontends/mn88472.c
index 29dd13b..25dd742 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;
--
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