summaryrefslogtreecommitdiff
path: root/drivers/iio/pressure
diff options
context:
space:
mode:
authorAlison Schofield <amsfield22@gmail.com>2016-10-11 12:33:12 -0700
committerJonathan Cameron <jic23@kernel.org>2016-10-23 19:33:55 +0100
commitac13980584d1fe2493516e1f6e839f0a3c425280 (patch)
tree6f2c02a6018107ddf5c445ba6a31c15d53cdf4f2 /drivers/iio/pressure
parent79de2ee469aaef0afb25dde7d65d7fbc91600573 (diff)
iio: pressure: mpl3115: claim direct mode during raw reads
Driver was checking for direct mode but not locking it. Use claim/release helper functions to guarantee the device stays in direct mode during raw reads. Signed-off-by: Alison Schofield <amsfield22@gmail.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/pressure')
-rw-r--r--drivers/iio/pressure/mpl3115.c26
1 files changed, 17 insertions, 9 deletions
diff --git a/drivers/iio/pressure/mpl3115.c b/drivers/iio/pressure/mpl3115.c
index 6392d7b62841..cc3f84139157 100644
--- a/drivers/iio/pressure/mpl3115.c
+++ b/drivers/iio/pressure/mpl3115.c
@@ -82,8 +82,9 @@ static int mpl3115_read_raw(struct iio_dev *indio_dev,
switch (mask) {
case IIO_CHAN_INFO_RAW:
- if (iio_buffer_enabled(indio_dev))
- return -EBUSY;
+ ret = iio_device_claim_direct_mode(indio_dev);
+ if (ret)
+ return ret;
switch (chan->type) {
case IIO_PRESSURE: /* in 0.25 pascal / LSB */
@@ -91,32 +92,39 @@ static int mpl3115_read_raw(struct iio_dev *indio_dev,
ret = mpl3115_request(data);
if (ret < 0) {
mutex_unlock(&data->lock);
- return ret;
+ break;
}
ret = i2c_smbus_read_i2c_block_data(data->client,
MPL3115_OUT_PRESS, 3, (u8 *) &tmp);
mutex_unlock(&data->lock);
if (ret < 0)
- return ret;
+ break;
*val = be32_to_cpu(tmp) >> 12;
- return IIO_VAL_INT;
+ ret = IIO_VAL_INT;
+ break;
case IIO_TEMP: /* in 0.0625 celsius / LSB */
mutex_lock(&data->lock);
ret = mpl3115_request(data);
if (ret < 0) {
mutex_unlock(&data->lock);
- return ret;
+ break;
}
ret = i2c_smbus_read_i2c_block_data(data->client,
MPL3115_OUT_TEMP, 2, (u8 *) &tmp);
mutex_unlock(&data->lock);
if (ret < 0)
- return ret;
+ break;
*val = sign_extend32(be32_to_cpu(tmp) >> 20, 11);
- return IIO_VAL_INT;
+ ret = IIO_VAL_INT;
+ break;
default:
- return -EINVAL;
+ ret = -EINVAL;
+ break;
}
+
+ iio_device_release_direct_mode(indio_dev);
+ return ret;
+
case IIO_CHAN_INFO_SCALE:
switch (chan->type) {
case IIO_PRESSURE: