linux-kernel - [PATCH v2 3/5] of: Reimplement of_machine_is_compatible() using of_machine_compatible

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Message-ID: <20231214103152.12269-3-mpe@ellerman.id.au>
Date:   Thu, 14 Dec 2023 21:31:50 +1100
From:   Michael Ellerman <mpe@...erman.id.au>
To:     <linuxppc-dev@...ts.ozlabs.org>
Cc:     <christophe.leroy@...roup.eu>, <robh+dt@...nel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH v2 3/5] of: Reimplement of_machine_is_compatible() using of_machine_compatible_match()

From: Christophe Leroy <christophe.leroy@...roup.eu>

of_machine_compatible_match() works with a table of strings.
of_machine_is_compatible() is a simplier version with only one string.

Re-implement of_machine_is_compatible() by setting a table of strings
with a single string then using of_machine_compatible_match().

Suggested-by: Rob Herring <robh+dt@...nel.org>
Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
Reviewed-by: Rob Herring <robh@...nel.org>
Signed-off-by: Michael Ellerman <mpe@...erman.id.au>
---
 drivers/of/base.c  | 21 +--------------------
 include/linux/of.h | 14 +++++++++++++-
 2 files changed, 14 insertions(+), 21 deletions(-)

v2: Unchanged.

diff --git a/drivers/of/base.c b/drivers/of/base.c
index c82c8b77badc..73c3a754bad1 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -414,26 +414,7 @@ bool of_machine_compatible_match(const char *const *compats)
 
 	return rc != 0;
 }
-
-/**
- * of_machine_is_compatible - Test root of device tree for a given compatible value
- * @compat: compatible string to look for in root node's compatible property.
- *
- * Return: true if the root node has the given value in its compatible property.
- */
-bool of_machine_is_compatible(const char *compat)
-{
-	struct device_node *root;
-	int rc = 0;
-
-	root = of_find_node_by_path("/");
-	if (root) {
-		rc = of_device_is_compatible(root, compat);
-		of_node_put(root);
-	}
-	return rc;
-}
-EXPORT_SYMBOL(of_machine_is_compatible);
+EXPORT_SYMBOL(of_machine_compatible_match);
 
 /**
  *  __of_device_is_available - check if a device is available for use
diff --git a/include/linux/of.h b/include/linux/of.h
index c5c663a7fb77..03ed4e37ca57 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -402,9 +402,21 @@ extern void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align));
 extern int of_alias_get_id(struct device_node *np, const char *stem);
 extern int of_alias_get_highest_id(const char *stem);
 
-extern bool of_machine_is_compatible(const char *compat);
 bool of_machine_compatible_match(const char *const *compats);
 
+/**
+ * of_machine_is_compatible - Test root of device tree for a given compatible value
+ * @compat: compatible string to look for in root node's compatible property.
+ *
+ * Return: true if the root node has the given value in its compatible property.
+ */
+static inline bool of_machine_is_compatible(const char *compat)
+{
+	const char *compats[] = { compat, NULL };
+
+	return of_machine_compatible_match(compats);
+}
+
 extern int of_add_property(struct device_node *np, struct property *prop);
 extern int of_remove_property(struct device_node *np, struct property *prop);
 extern int of_update_property(struct device_node *np, struct property *newprop);
-- 
2.43.0