diff options
author | Rohit Sarkar <rohitsarkar5398@gmail.com> | 2020-03-15 21:34:58 +0530 |
---|---|---|
committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2020-04-19 16:56:13 +0100 |
commit | bf09cddb2cd4028681a83426649f18b90c662e16 (patch) | |
tree | e65667a2a88f5b9bae4a049155bfd4ab5a5361fc | |
parent | bb8759f28e3685d3f0d97f948a3ad2dabe33b5f1 (diff) | |
download | linux-bf09cddb2cd4028681a83426649f18b90c662e16.tar.bz2 |
iio: adc: max1363: replace uses of mlock
Replace usage indio_dev's mlock with either local lock or
iio_device_claim_direct_mode.
Signed-off-by: Rohit Sarkar <rohitsarkar5398@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
-rw-r--r-- | drivers/iio/adc/max1363.c | 32 |
1 files changed, 23 insertions, 9 deletions
diff --git a/drivers/iio/adc/max1363.c b/drivers/iio/adc/max1363.c index 5c2cc61b666e..9d92017c79b2 100644 --- a/drivers/iio/adc/max1363.c +++ b/drivers/iio/adc/max1363.c @@ -150,6 +150,7 @@ struct max1363_chip_info { * @current_mode: the scan mode of this chip * @requestedmask: a valid requested set of channels * @reg: supply regulator + * @lock lock to ensure state is consistent * @monitor_on: whether monitor mode is enabled * @monitor_speed: parameter corresponding to device monitor speed setting * @mask_high: bitmask for enabled high thresholds @@ -169,6 +170,7 @@ struct max1363_state { const struct max1363_mode *current_mode; u32 requestedmask; struct regulator *reg; + struct mutex lock; /* Using monitor modes and buffer at the same time is currently not supported */ @@ -364,7 +366,11 @@ static int max1363_read_single_chan(struct iio_dev *indio_dev, struct max1363_state *st = iio_priv(indio_dev); struct i2c_client *client = st->client; - mutex_lock(&indio_dev->mlock); + ret = iio_device_claim_direct_mode(indio_dev); + if (ret) + return ret; + mutex_lock(&st->lock); + /* * If monitor mode is enabled, the method for reading a single * channel will have to be rather different and has not yet @@ -372,7 +378,7 @@ static int max1363_read_single_chan(struct iio_dev *indio_dev, * * Also, cannot read directly if buffered capture enabled. */ - if (st->monitor_on || iio_buffer_enabled(indio_dev)) { + if (st->monitor_on) { ret = -EBUSY; goto error_ret; } @@ -404,8 +410,10 @@ static int max1363_read_single_chan(struct iio_dev *indio_dev, data = rxbuf[0]; } *val = data; + error_ret: - mutex_unlock(&indio_dev->mlock); + mutex_unlock(&st->lock); + iio_device_release_direct_mode(indio_dev); return ret; } @@ -705,9 +713,9 @@ static ssize_t max1363_monitor_store_freq(struct device *dev, if (!found) return -EINVAL; - mutex_lock(&indio_dev->mlock); + mutex_lock(&st->lock); st->monitor_speed = i; - mutex_unlock(&indio_dev->mlock); + mutex_unlock(&st->lock); return 0; } @@ -810,12 +818,12 @@ static int max1363_read_event_config(struct iio_dev *indio_dev, int val; int number = chan->channel; - mutex_lock(&indio_dev->mlock); + mutex_lock(&st->lock); if (dir == IIO_EV_DIR_FALLING) val = (1 << number) & st->mask_low; else val = (1 << number) & st->mask_high; - mutex_unlock(&indio_dev->mlock); + mutex_unlock(&st->lock); return val; } @@ -962,7 +970,11 @@ static int max1363_write_event_config(struct iio_dev *indio_dev, u16 unifiedmask; int number = chan->channel; - mutex_lock(&indio_dev->mlock); + ret = iio_device_claim_direct_mode(indio_dev); + if (ret) + return ret; + mutex_lock(&st->lock); + unifiedmask = st->mask_low | st->mask_high; if (dir == IIO_EV_DIR_FALLING) { @@ -989,7 +1001,8 @@ static int max1363_write_event_config(struct iio_dev *indio_dev, max1363_monitor_mode_update(st, !!(st->mask_high | st->mask_low)); error_ret: - mutex_unlock(&indio_dev->mlock); + mutex_unlock(&st->lock); + iio_device_release_direct_mode(indio_dev); return ret; } @@ -1587,6 +1600,7 @@ static int max1363_probe(struct i2c_client *client, st = iio_priv(indio_dev); + mutex_init(&st->lock); st->reg = devm_regulator_get(&client->dev, "vcc"); if (IS_ERR(st->reg)) { ret = PTR_ERR(st->reg); |