Commit 1490cbb9 authored by Andy Shevchenko's avatar Andy Shevchenko Committed by Lee Jones
Browse files

device property: Split fwnode_get_child_node_count() 



The new helper is introduced to allow counting the child firmware nodes
of their parent without requiring a device to be passed. This also makes
the fwnode and device property API more symmetrical with the rest.

Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: default avatar"Rafael J. Wysocki" <rafael@kernel.org>
Reviewed-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: default avatarHeikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/20250310150835.3139322-2-andriy.shevchenko@linux.intel.com


Signed-off-by: default avatarLee Jones <lee@kernel.org>
parent 0af2f6be

drivers/base/property.c

+6 −6
Original line number Diff line number Diff line
@@ -928,22 +928,22 @@ bool fwnode_device_is_available(const struct fwnode_handle *fwnode) 
EXPORT_SYMBOL_GPL(fwnode_device_is_available);



/**

 * device_get_child_node_count - return the number of child nodes for device

 * @dev: Device to count the child nodes for

 * fwnode_get_child_node_count - return the number of child nodes for a given firmware node

 * @fwnode: Pointer to the parent firmware node

 *

 * Return: the number of child nodes for a given device.

 * Return: the number of child nodes for a given firmware node.

 */

unsigned int device_get_child_node_count(const struct device *dev)

unsigned int fwnode_get_child_node_count(const struct fwnode_handle *fwnode)

{

	struct fwnode_handle *child;

	unsigned int count = 0;



	device_for_each_child_node(dev, child)

	fwnode_for_each_child_node(fwnode, child)

		count++;



	return count;

}

EXPORT_SYMBOL_GPL(device_get_child_node_count);

EXPORT_SYMBOL_GPL(fwnode_get_child_node_count);



bool device_dma_supported(const struct device *dev)

{

include/linux/property.h

+6 −1
Original line number Diff line number Diff line
@@ -208,7 +208,12 @@ DEFINE_FREE(fwnode_handle, struct fwnode_handle *, fwnode_handle_put(_T)) 
int fwnode_irq_get(const struct fwnode_handle *fwnode, unsigned int index);

int fwnode_irq_get_byname(const struct fwnode_handle *fwnode, const char *name);



unsigned int device_get_child_node_count(const struct device *dev);

unsigned int fwnode_get_child_node_count(const struct fwnode_handle *fwnode);



static inline unsigned int device_get_child_node_count(const struct device *dev)

{

	return fwnode_get_child_node_count(dev_fwnode(dev));

}



static inline int device_property_read_u8(const struct device *dev,

					  const char *propname, u8 *val)