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-rw-r--r--drivers/staging/iio/magnetometer/hmc5843_core.c108
1 files changed, 58 insertions, 50 deletions
diff --git a/drivers/staging/iio/magnetometer/hmc5843_core.c b/drivers/staging/iio/magnetometer/hmc5843_core.c
index fd171d8b38fb..fffca3a9f637 100644
--- a/drivers/staging/iio/magnetometer/hmc5843_core.c
+++ b/drivers/staging/iio/magnetometer/hmc5843_core.c
@@ -1,25 +1,25 @@
-/* Copyright (C) 2010 Texas Instruments
- Author: Shubhrajyoti Datta <shubhrajyoti@ti.com>
- Acknowledgement: Jonathan Cameron <jic23@kernel.org> for valuable inputs.
-
- Support for HMC5883 and HMC5883L by Peter Meerwald <pmeerw@pmeerw.net>.
-
- Split to multiple files by Josef Gajdusek <atx@atx.name> - 2014
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
+/*
+ * Device driver for the the HMC5843 multi-chip module designed
+ * for low field magnetic sensing.
+ *
+ * Copyright (C) 2010 Texas Instruments
+ *
+ * Author: Shubhrajyoti Datta <shubhrajyoti@ti.com>
+ * Acknowledgment: Jonathan Cameron <jic23@kernel.org> for valuable inputs.
+ * Support for HMC5883 and HMC5883L by Peter Meerwald <pmeerw@pmeerw.net>.
+ * Split to multiple files by Josef Gajdusek <atx@atx.name> - 2014
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
#include <linux/module.h>
#include <linux/regmap.h>
@@ -122,7 +122,7 @@ static s32 hmc5843_set_mode(struct hmc5843_data *data, u8 operating_mode)
mutex_lock(&data->lock);
ret = regmap_update_bits(data->regmap, HMC5843_MODE_REG,
- HMC5843_MODE_MASK, operating_mode);
+ HMC5843_MODE_MASK, operating_mode);
mutex_unlock(&data->lock);
return ret;
@@ -165,7 +165,7 @@ static int hmc5843_read_measurement(struct hmc5843_data *data,
return ret;
}
ret = regmap_bulk_read(data->regmap, HMC5843_DATA_OUT_MSB_REGS,
- values, sizeof(values));
+ values, sizeof(values));
mutex_unlock(&data->lock);
if (ret < 0)
return ret;
@@ -198,15 +198,16 @@ static int hmc5843_set_meas_conf(struct hmc5843_data *data, u8 meas_conf)
mutex_lock(&data->lock);
ret = regmap_update_bits(data->regmap, HMC5843_CONFIG_REG_A,
- HMC5843_MEAS_CONF_MASK, meas_conf);
+ HMC5843_MEAS_CONF_MASK, meas_conf);
mutex_unlock(&data->lock);
return ret;
}
-static ssize_t hmc5843_show_measurement_configuration(struct device *dev,
- struct device_attribute *attr,
- char *buf)
+static
+ssize_t hmc5843_show_measurement_configuration(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
{
struct hmc5843_data *data = iio_priv(dev_to_iio_dev(dev));
unsigned int val;
@@ -220,10 +221,11 @@ static ssize_t hmc5843_show_measurement_configuration(struct device *dev,
return sprintf(buf, "%d\n", val);
}
-static ssize_t hmc5843_set_measurement_configuration(struct device *dev,
- struct device_attribute *attr,
- const char *buf,
- size_t count)
+static
+ssize_t hmc5843_set_measurement_configuration(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t count)
{
struct hmc5843_data *data = iio_priv(dev_to_iio_dev(dev));
unsigned long meas_conf = 0;
@@ -246,8 +248,9 @@ static IIO_DEVICE_ATTR(meas_conf,
hmc5843_set_measurement_configuration,
0);
-static ssize_t hmc5843_show_samp_freq_avail(struct device *dev,
- struct device_attribute *attr, char *buf)
+static
+ssize_t hmc5843_show_samp_freq_avail(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
struct hmc5843_data *data = iio_priv(dev_to_iio_dev(dev));
size_t len = 0;
@@ -272,20 +275,21 @@ static int hmc5843_set_samp_freq(struct hmc5843_data *data, u8 rate)
mutex_lock(&data->lock);
ret = regmap_update_bits(data->regmap, HMC5843_CONFIG_REG_A,
- HMC5843_RATE_MASK, rate << HMC5843_RATE_OFFSET);
+ HMC5843_RATE_MASK,
+ rate << HMC5843_RATE_OFFSET);
mutex_unlock(&data->lock);
return ret;
}
static int hmc5843_get_samp_freq_index(struct hmc5843_data *data,
- int val, int val2)
+ int val, int val2)
{
int i;
for (i = 0; i < data->variant->n_regval_to_samp_freq; i++)
if (val == data->variant->regval_to_samp_freq[i][0] &&
- val2 == data->variant->regval_to_samp_freq[i][1])
+ val2 == data->variant->regval_to_samp_freq[i][1])
return i;
return -EINVAL;
@@ -297,15 +301,16 @@ static int hmc5843_set_range_gain(struct hmc5843_data *data, u8 range)
mutex_lock(&data->lock);
ret = regmap_update_bits(data->regmap, HMC5843_CONFIG_REG_B,
- HMC5843_RANGE_GAIN_MASK,
- range << HMC5843_RANGE_GAIN_OFFSET);
+ HMC5843_RANGE_GAIN_MASK,
+ range << HMC5843_RANGE_GAIN_OFFSET);
mutex_unlock(&data->lock);
return ret;
}
static ssize_t hmc5843_show_scale_avail(struct device *dev,
- struct device_attribute *attr, char *buf)
+ struct device_attribute *attr,
+ char *buf)
{
struct hmc5843_data *data = iio_priv(dev_to_iio_dev(dev));
@@ -396,7 +401,8 @@ static int hmc5843_write_raw(struct iio_dev *indio_dev,
}
static int hmc5843_write_raw_get_fmt(struct iio_dev *indio_dev,
- struct iio_chan_spec const *chan, long mask)
+ struct iio_chan_spec const *chan,
+ long mask)
{
switch (mask) {
case IIO_CHAN_INFO_SAMP_FREQ:
@@ -423,14 +429,14 @@ static irqreturn_t hmc5843_trigger_handler(int irq, void *p)
}
ret = regmap_bulk_read(data->regmap, HMC5843_DATA_OUT_MSB_REGS,
- data->buffer, 3 * sizeof(__be16));
+ data->buffer, 3 * sizeof(__be16));
mutex_unlock(&data->lock);
if (ret < 0)
goto done;
iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
- iio_get_time_ns());
+ iio_get_time_ns());
done:
iio_trigger_notify_done(indio_dev->trig);
@@ -526,7 +532,7 @@ static int hmc5843_init(struct hmc5843_data *data)
u8 id[3];
ret = regmap_bulk_read(data->regmap, HMC5843_ID_REG,
- id, ARRAY_SIZE(id));
+ id, ARRAY_SIZE(id));
if (ret < 0)
return ret;
if (id[0] != 'H' || id[1] != '4' || id[2] != '3') {
@@ -556,7 +562,6 @@ static const struct iio_info hmc5843_info = {
static const unsigned long hmc5843_scan_masks[] = {0x7, 0};
-
int hmc5843_common_suspend(struct device *dev)
{
return hmc5843_set_mode(iio_priv(dev_get_drvdata(dev)),
@@ -567,19 +572,19 @@ EXPORT_SYMBOL(hmc5843_common_suspend);
int hmc5843_common_resume(struct device *dev)
{
return hmc5843_set_mode(iio_priv(dev_get_drvdata(dev)),
- HMC5843_MODE_SLEEP);
+ HMC5843_MODE_SLEEP);
}
EXPORT_SYMBOL(hmc5843_common_resume);
int hmc5843_common_probe(struct device *dev, struct regmap *regmap,
- enum hmc5843_ids id)
+ enum hmc5843_ids id)
{
struct hmc5843_data *data;
struct iio_dev *indio_dev;
int ret;
indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
- if (indio_dev == NULL)
+ if (!indio_dev)
return -ENOMEM;
dev_set_drvdata(dev, indio_dev);
@@ -592,6 +597,7 @@ int hmc5843_common_probe(struct device *dev, struct regmap *regmap,
mutex_init(&data->lock);
indio_dev->dev.parent = dev;
+ indio_dev->name = dev->driver->name;
indio_dev->info = &hmc5843_info;
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->channels = data->variant->channels;
@@ -603,9 +609,9 @@ int hmc5843_common_probe(struct device *dev, struct regmap *regmap,
return ret;
ret = iio_triggered_buffer_setup(indio_dev, NULL,
- hmc5843_trigger_handler, NULL);
+ hmc5843_trigger_handler, NULL);
if (ret < 0)
- return ret;
+ goto buffer_setup_err;
ret = iio_device_register(indio_dev);
if (ret < 0)
@@ -615,6 +621,8 @@ int hmc5843_common_probe(struct device *dev, struct regmap *regmap,
buffer_cleanup:
iio_triggered_buffer_cleanup(indio_dev);
+buffer_setup_err:
+ hmc5843_set_mode(iio_priv(indio_dev), HMC5843_MODE_SLEEP);
return ret;
}
EXPORT_SYMBOL(hmc5843_common_probe);
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