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Subject: device property: Add fwnode_name_eq()
Author: Sakari Ailus <sakari.ai...@linux.intel.com>
Date: Mon Nov 6 09:31:41 2023 +0200
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 <laurent.pinch...@ideasonboard.com>
Tested-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
Acked-by: Rafael J. Wysocki <raf...@kernel.org>
Acked-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
Signed-off-by: Sakari Ailus <sakari.ai...@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-ci...@xs4all.nl>
drivers/base/property.c | 28 ++++++++++++++++++++++++++++
include/linux/property.h | 1 +
2 files changed, 29 insertions(+)
---
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
diff --git a/include/linux/property.h b/include/linux/property.h
index 9f2585d705a8..4ebbb169df20 100644
--- a/include/linux/property.h
+++ b/include/linux/property.h
@@ -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);
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