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authorAntti Palosaari <crope@iki.fi>2016-11-30 22:08:27 -0200
committerMauro Carvalho Chehab <mchehab@s-opensource.com>2016-12-01 12:47:22 -0200
commit365fe4e0ce218dc5ad10df17b150a366b6015499 (patch)
treea9cc35f540430c453d67538b3410cded15fedb4b /drivers/media
parentd930b5b5bf122a61952cfebabb1e618682a2631a (diff)
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[media] mn88472: fix chip id check on probe
A register used to identify chip during probe was overwritten during firmware download and due to that later probe's for warm chip were failing. Detect chip from the another register, which is located on different register bank 2. Fixes: 94d0eaa41987 ("[media] mn88472: move out of staging to media") Cc: <stable@vger.kernel.org> # v4.8+ Signed-off-by: Antti Palosaari <crope@iki.fi> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/media')
-rw-r--r--drivers/media/dvb-frontends/mn88472.c24
1 files changed, 12 insertions, 12 deletions
diff --git a/drivers/media/dvb-frontends/mn88472.c b/drivers/media/dvb-frontends/mn88472.c
index b6f5f8337cfd..29dd13b36c28 100644
--- a/drivers/media/dvb-frontends/mn88472.c
+++ b/drivers/media/dvb-frontends/mn88472.c
@@ -488,18 +488,6 @@ static int mn88472_probe(struct i2c_client *client,
goto err_kfree;
}
- /* Check demod answers with correct chip id */
- ret = regmap_read(dev->regmap[0], 0xff, &utmp);
- if (ret)
- goto err_regmap_0_regmap_exit;
-
- dev_dbg(&client->dev, "chip id=%02x\n", utmp);
-
- if (utmp != 0x02) {
- ret = -ENODEV;
- goto err_regmap_0_regmap_exit;
- }
-
/*
* Chip has three I2C addresses for different register banks. Used
* addresses are 0x18, 0x1a and 0x1c. We register two dummy clients,
@@ -536,6 +524,18 @@ static int mn88472_probe(struct i2c_client *client,
}
i2c_set_clientdata(dev->client[2], dev);
+ /* Check demod answers with correct chip id */
+ ret = regmap_read(dev->regmap[2], 0xff, &utmp);
+ if (ret)
+ goto err_regmap_2_regmap_exit;
+
+ dev_dbg(&client->dev, "chip id=%02x\n", utmp);
+
+ if (utmp != 0x02) {
+ ret = -ENODEV;
+ goto err_regmap_2_regmap_exit;
+ }
+
/* Sleep because chip is active by default */
ret = regmap_write(dev->regmap[2], 0x05, 0x3e);
if (ret)