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path: root/drivers/iio/industrialio-core.c
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Diffstat (limited to 'drivers/iio/industrialio-core.c')
-rw-r--r--drivers/iio/industrialio-core.c51
1 files changed, 49 insertions, 2 deletions
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index e145931ef1b8..97f0297b120f 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -383,14 +383,14 @@ static ssize_t iio_read_channel_info(struct device *dev,
scale_db = true;
case IIO_VAL_INT_PLUS_MICRO:
if (val2 < 0)
- return sprintf(buf, "-%d.%06u%s\n", val, -val2,
+ return sprintf(buf, "-%ld.%06u%s\n", abs(val), -val2,
scale_db ? " dB" : "");
else
return sprintf(buf, "%d.%06u%s\n", val, val2,
scale_db ? " dB" : "");
case IIO_VAL_INT_PLUS_NANO:
if (val2 < 0)
- return sprintf(buf, "-%d.%09u\n", val, -val2);
+ return sprintf(buf, "-%ld.%09u\n", abs(val), -val2);
else
return sprintf(buf, "%d.%09u\n", val, val2);
case IIO_VAL_FRACTIONAL:
@@ -912,6 +912,53 @@ void iio_device_free(struct iio_dev *dev)
}
EXPORT_SYMBOL(iio_device_free);
+static void devm_iio_device_release(struct device *dev, void *res)
+{
+ iio_device_free(*(struct iio_dev **)res);
+}
+
+static int devm_iio_device_match(struct device *dev, void *res, void *data)
+{
+ struct iio_dev **r = res;
+ if (!r || !*r) {
+ WARN_ON(!r || !*r);
+ return 0;
+ }
+ return *r == data;
+}
+
+struct iio_dev *devm_iio_device_alloc(struct device *dev, int sizeof_priv)
+{
+ struct iio_dev **ptr, *iio_dev;
+
+ ptr = devres_alloc(devm_iio_device_release, sizeof(*ptr),
+ GFP_KERNEL);
+ if (!ptr)
+ return NULL;
+
+ /* use raw alloc_dr for kmalloc caller tracing */
+ iio_dev = iio_device_alloc(sizeof_priv);
+ if (iio_dev) {
+ *ptr = iio_dev;
+ devres_add(dev, ptr);
+ } else {
+ devres_free(ptr);
+ }
+
+ return iio_dev;
+}
+EXPORT_SYMBOL_GPL(devm_iio_device_alloc);
+
+void devm_iio_device_free(struct device *dev, struct iio_dev *iio_dev)
+{
+ int rc;
+
+ rc = devres_release(dev, devm_iio_device_release,
+ devm_iio_device_match, iio_dev);
+ WARN_ON(rc);
+}
+EXPORT_SYMBOL_GPL(devm_iio_device_free);
+
/**
* iio_chrdev_open() - chrdev file open for buffer access and ioctls
**/