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authorGregor Boirie <gregor.boirie@parrot.com>2016-09-02 21:47:55 +0300
committerJonathan Cameron <jic23@kernel.org>2016-09-04 17:42:46 +0300
commit70e483487db787b152da756d4be0fef917378142 (patch)
tree53e07ce3e66eede20b9516083d06f9d5571f4386 /drivers/iio/buffer
parent9083325f1197a6956db17809d74dbe3578dc1005 (diff)
downloadlinux-70e483487db787b152da756d4be0fef917378142.tar.xz
iio: add resource managed triggered buffer init helpers
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>
Diffstat (limited to 'drivers/iio/buffer')
-rw-r--r--drivers/iio/buffer/industrialio-triggered-buffer.c42
1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/iio/buffer/industrialio-triggered-buffer.c b/drivers/iio/buffer/industrialio-triggered-buffer.c
index 4b2858ba1fd6..d3db1fce54d2 100644
--- a/drivers/iio/buffer/industrialio-triggered-buffer.c
+++ b/drivers/iio/buffer/industrialio-triggered-buffer.c
@@ -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");