linux-kernel - [PATCH v2 4/7] of: Exchange implementation between of_property_present() and of_property_read

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Message-Id: <20241216-of_core_fix-v2-4-e69b8f60da63@quicinc.com>
Date: Mon, 16 Dec 2024 08:40:43 +0800
From: Zijun Hu <zijun_hu@...oud.com>
To: Rob Herring <robh@...nel.org>, Saravana Kannan <saravanak@...gle.com>, 
 Maxime Ripard <mripard@...nel.org>, Robin Murphy <robin.murphy@....com>, 
 Grant Likely <grant.likely@...retlab.ca>
Cc: Zijun Hu <zijun_hu@...oud.com>, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Zijun Hu <quic_zijuhu@...cinc.com>
Subject: [PATCH v2 4/7] of: Exchange implementation between
 of_property_present() and of_property_read_bool()

From: Zijun Hu <quic_zijuhu@...cinc.com>

of_property_present() is to check if a property is present or not,
and it should be applicable for all kinds of property, but it calls
of_property_read_bool() to implement the function, so narrows its
property scope to only bool type.

Fix by exchanging implementation, namely, changing call chain from:
of_property_present() -> of_property_read_bool() -> of_find_property()
to :
of_property_read_bool() -> of_property_present() -> of_find_property()
which looks more logical as well.

Signed-off-by: Zijun Hu <quic_zijuhu@...cinc.com>
---
 include/linux/of.h | 23 ++++++++++++-----------
 1 file changed, 12 insertions(+), 11 deletions(-)

diff --git a/include/linux/of.h b/include/linux/of.h
index f921786cb8ac782286ed5ff4425a35668204d050..7b0da8d352dffd8b872998903282119b6164a5bc 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -1243,17 +1243,16 @@ static inline int of_property_read_string_index(const struct device_node *np,
 }
 
 /**
- * of_property_read_bool - Find a property
- * @np:		device node from which the property value is to be read.
+ * of_property_present - Test if a property is present in a node
+ * @np:		device node to search for the property.
  * @propname:	name of the property to be searched.
  *
- * Search for a boolean property in a device node. Usage on non-boolean
- * property types is deprecated.
+ * Test for a property present in a device node.
  *
  * Return: true if the property exists false otherwise.
  */
-static inline bool of_property_read_bool(const struct device_node *np,
-					 const char *propname)
+static inline bool of_property_present(const struct device_node *np,
+				       const char *propname)
 {
 	const struct property *prop = of_find_property(np, propname, NULL);
 
@@ -1261,17 +1260,19 @@ static inline bool of_property_read_bool(const struct device_node *np,
 }
 
 /**
- * of_property_present - Test if a property is present in a node
- * @np:		device node to search for the property.
+ * of_property_read_bool - Find a property
+ * @np:		device node from which the property value is to be read.
  * @propname:	name of the property to be searched.
  *
- * Test for a property present in a device node.
+ * Search for a boolean property in a device node. Usage on non-boolean
+ * property types is deprecated.
  *
  * Return: true if the property exists false otherwise.
  */
-static inline bool of_property_present(const struct device_node *np, const char *propname)
+static inline bool of_property_read_bool(const struct device_node *np,
+					 const char *propname)
 {
-	return of_property_read_bool(np, propname);
+	return of_property_present(np, propname);
 }
 
 /**

-- 
2.34.1