From 70e483487db787b152da756d4be0fef917378142 Mon Sep 17 00:00:00 2001 From: Gregor Boirie Date: Fri, 2 Sep 2016 20:47:55 +0200 Subject: 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 Signed-off-by: Jonathan Cameron --- drivers/iio/buffer/industrialio-triggered-buffer.c | 42 ++++++++++++++++++++++ 1 file changed, 42 insertions(+) (limited to 'drivers/iio/buffer') 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 "); MODULE_DESCRIPTION("IIO helper functions for setting up triggered buffers"); MODULE_LICENSE("GPL"); -- cgit v1.2.1