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iio: add resource managed triggered buffer init helpers

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Add resource managed devm_iio_triggered_buffer_setup() and
devm_iio_triggered_buffer_cleanup() to automatically clean up triggered
buffers setup by IIO drivers, thus leading to simplified IIO drivers code.

Signed-off-by: Gregor Boirie <gregor.boirie@parrot.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Gregor Boirie
2016-09-02 20:47:55 +02:00
committed by Jonathan Cameron
parent 9083325f11
commit 70e483487d
5 changed files with 55 additions and 1 deletions
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drivers/iio/buffer/industrialio-triggered-buffer.c
+42
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@@ -98,6 +98,48 @@ void iio_triggered_buffer_cleanup(struct iio_dev *indio_dev)
}
EXPORT_SYMBOL(iio_triggered_buffer_cleanup);
static void devm_iio_triggered_buffer_clean(struct device *dev, void *res)
{
iio_triggered_buffer_cleanup(*(struct iio_dev **)res);
}
int devm_iio_triggered_buffer_setup(struct device *dev,
struct iio_dev *indio_dev,
irqreturn_t (*h)(int irq, void *p),
irqreturn_t (*thread)(int irq, void *p),
const struct iio_buffer_setup_ops *ops)
{
struct iio_dev **ptr;
int ret;
ptr = devres_alloc(devm_iio_triggered_buffer_clean, sizeof(*ptr),
GFP_KERNEL);
if (!ptr)
return -ENOMEM;
*ptr = indio_dev;
ret = iio_triggered_buffer_setup(indio_dev, h, thread, ops);
if (!ret)
devres_add(dev, ptr);
else
devres_free(ptr);
return ret;
}
EXPORT_SYMBOL_GPL(devm_iio_triggered_buffer_setup);
void devm_iio_triggered_buffer_cleanup(struct device *dev,
struct iio_dev *indio_dev)
{
int rc;
rc = devres_release(dev, devm_iio_triggered_buffer_clean,
devm_iio_device_match, indio_dev);
WARN_ON(rc);
}
EXPORT_SYMBOL_GPL(devm_iio_triggered_buffer_cleanup);
MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
MODULE_DESCRIPTION("IIO helper functions for setting up triggered buffers");
MODULE_LICENSE("GPL");