From: "Vianney le Clément de Saint-Marcq" <vianney.leclement@essensium.com>
To: linux-iio@vger.kernel.org
Cc: "Vianney le Clément de Saint-Marcq"
<vianney.leclement@essensium.com>,
"Arnout Vandecappelle (Essensium/Mind)" <arnout@mind.be>
Subject: [PATCH v2 7/7] iio: mlx90614: Check for errors in read values
Date: Tue, 24 Mar 2015 16:54:19 +0100 [thread overview]
Message-ID: <1427212459-31585-8-git-send-email-vianney.leclement@essensium.com> (raw)
In-Reply-To: <1427212459-31585-1-git-send-email-vianney.leclement@essensium.com>
The device uses the MSB of the returned temperature values as an error
flag. Return a read error when this bit is set.
Signed-off-by: Vianney le Clément de Saint-Marcq <vianney.leclement@essensium.com>
Cc: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
---
v2: new patch
---
drivers/iio/temperature/mlx90614.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/iio/temperature/mlx90614.c b/drivers/iio/temperature/mlx90614.c
index 6b9bfcd..6cb1e81 100644
--- a/drivers/iio/temperature/mlx90614.c
+++ b/drivers/iio/temperature/mlx90614.c
@@ -196,6 +196,11 @@ static int mlx90614_read_raw(struct iio_dev *indio_dev,
if (ret < 0)
return ret;
+
+ /* MSB is an error flag */
+ if (ret & 0x8000)
+ return -EREMOTEIO;
+
*val = ret;
return IIO_VAL_INT;
case IIO_CHAN_INFO_OFFSET:
--
2.3.3
next prev parent reply other threads:[~2015-03-24 15:54 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-24 15:54 [PATCH v2 0/7] iio: mlx90614 enhancements Vianney le Clément de Saint-Marcq
2015-03-24 15:54 ` [PATCH v2 1/7] iio: mlx90614: Refactor register symbols Vianney le Clément de Saint-Marcq
2015-03-28 12:40 ` Jonathan Cameron
2015-03-24 15:54 ` [PATCH v2 2/7] iio: mlx90614: Add symbols for accessible registers Vianney le Clément de Saint-Marcq
2015-03-24 15:54 ` [PATCH v2 3/7] iio: mlx90614: Support devices with dual IR sensor Vianney le Clément de Saint-Marcq
2015-03-28 12:44 ` Jonathan Cameron
2015-03-24 15:54 ` [PATCH v2 4/7] iio: core: Introduce IIO_CHAN_INFO_EMISSIVITY Vianney le Clément de Saint-Marcq
2015-03-24 16:02 ` Lars-Peter Clausen
2015-03-28 12:45 ` Jonathan Cameron
2015-03-24 15:54 ` [PATCH v2 5/7] iio: mlx90614: Add emissivity setting Vianney le Clément de Saint-Marcq
2015-03-28 12:46 ` Jonathan Cameron
2015-03-24 15:54 ` [PATCH v2 6/7] iio: mlx90614: Add power management Vianney le Clément de Saint-Marcq
2015-03-28 12:54 ` Jonathan Cameron
2015-03-24 15:54 ` Vianney le Clément de Saint-Marcq [this message]
2015-03-28 13:43 ` [PATCH v2 7/7] iio: mlx90614: Check for errors in read values Jonathan Cameron
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