staging:iio:adis16400: Code style cleanup

Do a set of minor miscellaneous code style cleanups for the adis16400 before
moving it out of staging. Delete outdated comments, removed excess whitespace,
add missing whitespace, replace u{8,16} with uint{8,16}_t.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

drivers/staging/iio/imu/adis16400_core.c

@@ -45,7 +45,7 @@ enum adis16400_chip_variant {
 static int adis16334_get_freq(struct adis16400_state *st)
 {
 	int ret;
-	u16 t;
+	uint16_t t;
 
 	ret = adis_read_reg_16(&st->adis, ADIS16400_SMPL_PRD, &t);
 	if (ret < 0)
@@ -78,12 +78,13 @@ static int adis16334_set_freq(struct adis16400_state *st, unsigned int freq)
 static int adis16400_get_freq(struct adis16400_state *st)
 {
 	int sps, ret;
-	u16 t;
+	uint16_t t;
 
 	ret = adis_read_reg_16(&st->adis, ADIS16400_SMPL_PRD, &t);
 	if (ret < 0)
 		return ret;
-	sps =  (t & ADIS16400_SMPL_PRD_TIME_BASE) ? 53 : 1638;
+
+	sps = (t & ADIS16400_SMPL_PRD_TIME_BASE) ? 53 : 1638;
 	sps /= (t & ADIS16400_SMPL_PRD_DIV_MASK) + 1;
 
 	return sps;
@@ -97,6 +98,7 @@ static int adis16400_set_freq(struct adis16400_state *st, unsigned int freq)
 	if (t > 0)
 		t--;
 	t &= ADIS16400_SMPL_PRD_DIV_MASK;
+
 	if ((t & ADIS16400_SMPL_PRD_DIV_MASK) >= 0x0A)
 		st->adis.spi->max_speed_hz = ADIS16400_SPI_SLOW;
 	else
@@ -111,13 +113,13 @@ static ssize_t adis16400_read_frequency(struct device *dev,
 {
 	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
 	struct adis16400_state *st = iio_priv(indio_dev);
-	int ret, len = 0;
+	int ret;
 
 	ret = st->variant->get_freq(st);
 	if (ret < 0)
 		return ret;
-	len = sprintf(buf, "%d\n", ret);
-	return len;
+
+	return sprintf(buf, "%d\n", ret);
 }
 
 static const unsigned adis16400_3db_divisors[] = {
@@ -134,8 +136,8 @@ static const unsigned adis16400_3db_divisors[] = {
 static int adis16400_set_filter(struct iio_dev *indio_dev, int sps, int val)
 {
 	struct adis16400_state *st = iio_priv(indio_dev);
+	uint16_t val16;
 	int i, ret;
-	u16 val16;
 
 	for (i = ARRAY_SIZE(adis16400_3db_divisors) - 1; i >= 1; i--) {
 		if (sps / adis16400_3db_divisors[i] >= val)
@@ -152,26 +154,22 @@ static int adis16400_set_filter(struct iio_dev *indio_dev, int sps, int val)
 }
 
 static ssize_t adis16400_write_frequency(struct device *dev,
-		struct device_attribute *attr,
-		const char *buf,
-		size_t len)
+	struct device_attribute *attr, const char *buf, size_t len)
 {
 	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
 	struct adis16400_state *st = iio_priv(indio_dev);
 	long val;
 	int ret;
 
-	ret = strict_strtol(buf, 10, &val);
+	ret = kstrtol(buf, 10, &val);
 	if (ret)
 		return ret;
+
 	if (val == 0)
 		return -EINVAL;
 
 	mutex_lock(&indio_dev->mlock);
-
 	st->variant->set_freq(st, val);
-
-	/* Also update the filter */
 	mutex_unlock(&indio_dev->mlock);
 
 	return ret ? ret : len;
@@ -182,9 +180,9 @@ static int adis16400_stop_device(struct iio_dev *indio_dev)
 {
 	struct adis16400_state *st = iio_priv(indio_dev);
 	int ret;
-	u16 val = ADIS16400_SLP_CNT_POWER_OFF;
 
-	ret = adis_write_reg_16(&st->adis, ADIS16400_SLP_CNT, val);
+	ret = adis_write_reg_16(&st->adis, ADIS16400_SLP_CNT,
+			ADIS16400_SLP_CNT_POWER_OFF);
 	if (ret)
 		dev_err(&indio_dev->dev,
 			"problem with turning device off: SLP_CNT");
@@ -194,10 +192,10 @@ static int adis16400_stop_device(struct iio_dev *indio_dev)
 
 static int adis16400_initial_setup(struct iio_dev *indio_dev)
 {
-	int ret;
-	u16 prod_id, smp_prd;
-	unsigned int device_id;
 	struct adis16400_state *st = iio_priv(indio_dev);
+	uint16_t prod_id, smp_prd;
+	unsigned int device_id;
+	int ret;
 
 	/* use low spi speed for init if the device has a slow mode */
 	if (st->variant->flags & ADIS16400_HAS_SLOW_MODE)
@@ -224,8 +222,8 @@ static int adis16400_initial_setup(struct iio_dev *indio_dev)
 					device_id, prod_id);
 
 		dev_info(&indio_dev->dev, "%s: prod_id 0x%04x at CS%d (irq %d)\n",
-		       indio_dev->name, prod_id,
-		       st->adis.spi->chip_select, st->adis.spi->irq);
+			indio_dev->name, prod_id,
+			st->adis.spi->chip_select, st->adis.spi->irq);
 	}
 	/* use high spi speed if possible */
 	if (st->variant->flags & ADIS16400_HAS_SLOW_MODE) {
@@ -247,7 +245,7 @@ static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO,
 			      adis16400_read_frequency,
 			      adis16400_write_frequency);
 
-static const u8 adis16400_addresses[] = {
+static const uint8_t adis16400_addresses[] = {
 	[ADIS16400_SCAN_GYRO_X] = ADIS16400_XGYRO_OFF,
 	[ADIS16400_SCAN_GYRO_Y] = ADIS16400_YGYRO_OFF,
 	[ADIS16400_SCAN_GYRO_Z] = ADIS16400_ZGYRO_OFF,
@@ -257,15 +255,12 @@ static const u8 adis16400_addresses[] = {
 };
 
 static int adis16400_write_raw(struct iio_dev *indio_dev,
-			       struct iio_chan_spec const *chan,
-			       int val,
-			       int val2,
-			       long mask)
+	struct iio_chan_spec const *chan, int val, int val2, long info)
 {
 	struct adis16400_state *st = iio_priv(indio_dev);
 	int ret, sps;
 
-	switch (mask) {
+	switch (info) {
 	case IIO_CHAN_INFO_CALIBBIAS:
 		mutex_lock(&indio_dev->mlock);
 		ret = adis_write_reg_16(&st->adis,
@@ -273,8 +268,10 @@ static int adis16400_write_raw(struct iio_dev *indio_dev,
 		mutex_unlock(&indio_dev->mlock);
 		return ret;
 	case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
-		/* Need to cache values so we can update if the frequency
-		   changes */
+		/*
+		 * Need to cache values so we can update if the frequency
+		 * changes.
+		 */
 		mutex_lock(&indio_dev->mlock);
 		st->filt_int = val;
 		/* Work out update to current value */
@@ -293,16 +290,13 @@ static int adis16400_write_raw(struct iio_dev *indio_dev,
 }
 
 static int adis16400_read_raw(struct iio_dev *indio_dev,
-			      struct iio_chan_spec const *chan,
-			      int *val,
-			      int *val2,
-			      long mask)
+	struct iio_chan_spec const *chan, int *val, int *val2, long info)
 {
 	struct adis16400_state *st = iio_priv(indio_dev);
+	int16_t val16;
 	int ret;
-	s16 val16;
 
-	switch (mask) {
+	switch (info) {
 	case IIO_CHAN_INFO_RAW:
 		return adis_single_conversion(indio_dev, chan, 0, val);
 	case IIO_CHAN_INFO_SCALE:
@@ -721,13 +715,14 @@ static const struct adis_data adis16400_data = {
 
 static int adis16400_probe(struct spi_device *spi)
 {
-	int ret;
 	struct adis16400_state *st;
-	struct iio_dev *indio_dev = iio_device_alloc(sizeof(*st));
-	if (indio_dev == NULL) {
-		ret =  -ENOMEM;
-		goto error_ret;
-	}
+	struct iio_dev *indio_dev;
+	int ret;
+
+	indio_dev = iio_device_alloc(sizeof(*st));
+	if (indio_dev == NULL)
+		return -ENOMEM;
+
 	st = iio_priv(indio_dev);
 	/* this is only used for removal purposes */
 	spi_set_drvdata(spi, indio_dev);
@@ -767,14 +762,12 @@ error_cleanup_buffer:
 	adis_cleanup_buffer_and_trigger(&st->adis, indio_dev);
 error_free_dev:
 	iio_device_free(indio_dev);
-error_ret:
 	return ret;
 }
 
-/* fixme, confirm ordering in this function */
 static int adis16400_remove(struct spi_device *spi)
 {
-	struct iio_dev *indio_dev =  spi_get_drvdata(spi);
+	struct iio_dev *indio_dev = spi_get_drvdata(spi);
 	struct adis16400_state *st = iio_priv(indio_dev);
 
 	iio_device_unregister(indio_dev);