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Unverified Commit b688c18d authored by Arnaud Pouliquen's avatar Arnaud Pouliquen Committed by Mark Brown
Browse files

IIO: hw_consumer: add devm_iio_hw_consumer_alloc 



Add devm_iio_hw_consumer_alloc function that calls iio_hw_consumer_free
when the device is unbound from the bus.

Signed-off-by: default avatarArnaud Pouliquen <arnaud.pouliquen@st.com>
Reviewed-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 5b178943

drivers/iio/buffer/industrialio-hw-consumer.c

+66 −0
Original line number Diff line number Diff line
@@ -137,6 +137,72 @@ void iio_hw_consumer_free(struct iio_hw_consumer *hwc) 
}

EXPORT_SYMBOL_GPL(iio_hw_consumer_free);



static void devm_iio_hw_consumer_release(struct device *dev, void *res)

{

	iio_hw_consumer_free(*(struct iio_hw_consumer **)res);

}



static int devm_iio_hw_consumer_match(struct device *dev, void *res, void *data)

{

	struct iio_hw_consumer **r = res;



	if (!r || !*r) {

		WARN_ON(!r || !*r);

		return 0;

	}

	return *r == data;

}



/**

 * devm_iio_hw_consumer_alloc - Resource-managed iio_hw_consumer_alloc()

 * @dev: Pointer to consumer device.

 *

 * Managed iio_hw_consumer_alloc. iio_hw_consumer allocated with this function

 * is automatically freed on driver detach.

 *

 * If an iio_hw_consumer allocated with this function needs to be freed

 * separately, devm_iio_hw_consumer_free() must be used.

 *

 * returns pointer to allocated iio_hw_consumer on success, NULL on failure.

 */

struct iio_hw_consumer *devm_iio_hw_consumer_alloc(struct device *dev)

{

	struct iio_hw_consumer **ptr, *iio_hwc;



	ptr = devres_alloc(devm_iio_hw_consumer_release, sizeof(*ptr),

			   GFP_KERNEL);

	if (!ptr)

		return NULL;



	iio_hwc = iio_hw_consumer_alloc(dev);

	if (IS_ERR(iio_hwc)) {

		devres_free(ptr);

	} else {

		*ptr = iio_hwc;

		devres_add(dev, ptr);

	}



	return iio_hwc;

}

EXPORT_SYMBOL_GPL(devm_iio_hw_consumer_alloc);



/**

 * devm_iio_hw_consumer_free - Resource-managed iio_hw_consumer_free()

 * @dev: Pointer to consumer device.

 * @hwc: iio_hw_consumer to free.

 *

 * Free iio_hw_consumer allocated with devm_iio_hw_consumer_alloc().

 */

void devm_iio_hw_consumer_free(struct device *dev, struct iio_hw_consumer *hwc)

{

	int rc;



	rc = devres_release(dev, devm_iio_hw_consumer_release,

			    devm_iio_hw_consumer_match, hwc);

	WARN_ON(rc);

}

EXPORT_SYMBOL_GPL(devm_iio_hw_consumer_free);



/**

 * iio_hw_consumer_enable() - Enable IIO hardware consumer

 * @hwc: iio_hw_consumer to enable.

include/linux/iio/hw-consumer.h

+2 −0
Original line number Diff line number Diff line
@@ -13,6 +13,8 @@ struct iio_hw_consumer; 


struct iio_hw_consumer *iio_hw_consumer_alloc(struct device *dev);

void iio_hw_consumer_free(struct iio_hw_consumer *hwc);

struct iio_hw_consumer *devm_iio_hw_consumer_alloc(struct device *dev);

void devm_iio_hw_consumer_free(struct device *dev, struct iio_hw_consumer *hwc);

int iio_hw_consumer_enable(struct iio_hw_consumer *hwc);

void iio_hw_consumer_disable(struct iio_hw_consumer *hwc);