Commit a9c8c738 authored by Sakari Ailus's avatar Sakari Ailus Committed by Hans Verkuil
Browse files

device property: Add fwnode_name_eq() 



Add fwnode_name_eq() to implement the functionality of of_node_name_eq()
on fwnode property API. The same convention of ending the comparison at
'@' (besides NUL) is applied on also both ACPI and swnode. The function
is intended for comparing unit address-less node names on DT and firmware
or swnodes compliant with DT bindings.

Reviewed-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: default avatarRafael J. Wysocki <rafael@kernel.org>
Acked-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: default avatarHans Verkuil <hverkuil-cisco@xs4all.nl>
parent 03cc7fef

drivers/base/property.c

+28 −0
Original line number Diff line number Diff line
@@ -594,6 +594,34 @@ const char *fwnode_get_name_prefix(const struct fwnode_handle *fwnode) 
	return fwnode_call_ptr_op(fwnode, get_name_prefix);

}



/**

 * fwnode_name_eq - Return true if node name is equal

 * @fwnode: The firmware node

 * @name: The name to which to compare the node name

 *

 * Compare the name provided as an argument to the name of the node, stopping

 * the comparison at either NUL or '@' character, whichever comes first. This

 * function is generally used for comparing node names while ignoring the

 * possible unit address of the node.

 *

 * Return: true if the node name matches with the name provided in the @name

 * argument, false otherwise.

 */

bool fwnode_name_eq(const struct fwnode_handle *fwnode, const char *name)

{

	const char *node_name;

	ptrdiff_t len;



	node_name = fwnode_get_name(fwnode);

	if (!node_name)

		return false;



	len = strchrnul(node_name, '@') - node_name;



	return str_has_prefix(node_name, name) == len;

}

EXPORT_SYMBOL_GPL(fwnode_name_eq);



/**

 * fwnode_get_parent - Return parent firwmare node

 * @fwnode: Firmware whose parent is retrieved

include/linux/property.h

+1 −0
Original line number Diff line number Diff line
@@ -109,6 +109,7 @@ struct fwnode_handle *fwnode_find_reference(const struct fwnode_handle *fwnode, 


const char *fwnode_get_name(const struct fwnode_handle *fwnode);

const char *fwnode_get_name_prefix(const struct fwnode_handle *fwnode);

bool fwnode_name_eq(const struct fwnode_handle *fwnode, const char *name);



struct fwnode_handle *fwnode_get_parent(const struct fwnode_handle *fwnode);

struct fwnode_handle *fwnode_get_next_parent(struct fwnode_handle *fwnode);