From a9c8c738066b7ba9e208cfc3200a6f60593982b4 Mon Sep 17 00:00:00 2001 From: Sakari Ailus Date: Mon, 6 Nov 2023 09:31:41 +0200 Subject: 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: Laurent Pinchart Tested-by: Laurent Pinchart Acked-by: Rafael J. Wysocki Acked-by: Greg Kroah-Hartman Signed-off-by: Sakari Ailus Signed-off-by: Hans Verkuil --- drivers/base/property.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) (limited to 'drivers/base') diff --git a/drivers/base/property.c b/drivers/base/property.c index 8c40abed7852..b79608ee0b46 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -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 -- cgit v1.2.3