clk: Extract OF clock helpers in <linux/of_clk.h>

The use of of_clk_get_parent_{count,name}() and of_clk_init() is not
limited to clock providers.

Hence move these helpers into their own header file, so callers that are
not clock providers no longer have to include <linux/clk-provider.h>.

Suggested-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

diff --git a/MAINTAINERS b/MAINTAINERS
index 0a1410d..b61b2bf 100644 (file)
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3556,6 +3556,7 @@ F:        drivers/clk/
 X:     drivers/clk/clkdev.c
 F:     include/linux/clk-pr*
 F:     include/linux/clk/
+F:     include/linux/of_clk.h
 
 COMMON INTERNET FILE SYSTEM (CIFS)
 M:     Steve French <sfrench@samba.org>

diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index 210a890..61cb472 100644 (file)
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -13,6 +13,7 @@
 
 #include <linux/io.h>
 #include <linux/of.h>
+#include <linux/of_clk.h>
 
 #ifdef CONFIG_COMMON_CLK
 
@@ -890,13 +891,10 @@ struct clk_hw *of_clk_hw_simple_get(struct of_phandle_args *clkspec,
 struct clk *of_clk_src_onecell_get(struct of_phandle_args *clkspec, void *data);
 struct clk_hw *of_clk_hw_onecell_get(struct of_phandle_args *clkspec,
                                     void *data);
-unsigned int of_clk_get_parent_count(struct device_node *np);
 int of_clk_parent_fill(struct device_node *np, const char **parents,
                       unsigned int size);
-const char *of_clk_get_parent_name(struct device_node *np, int index);
 int of_clk_detect_critical(struct device_node *np, int index,
                            unsigned long *flags);
-void of_clk_init(const struct of_device_id *matches);
 
 #else /* !CONFIG_OF */
 
@@ -943,26 +941,16 @@ of_clk_hw_onecell_get(struct of_phandle_args *clkspec, void *data)
 {
        return ERR_PTR(-ENOENT);
 }
-static inline unsigned int of_clk_get_parent_count(struct device_node *np)
-{
-       return 0;
-}
 static inline int of_clk_parent_fill(struct device_node *np,
                                     const char **parents, unsigned int size)
 {
        return 0;
 }
-static inline const char *of_clk_get_parent_name(struct device_node *np,
-                                                int index)
-{
-       return NULL;
-}
 static inline int of_clk_detect_critical(struct device_node *np, int index,
                                          unsigned long *flags)
 {
        return 0;
 }
-static inline void of_clk_init(const struct of_device_id *matches) {}
 #endif /* CONFIG_OF */
 
 /*

diff --git a/include/linux/of_clk.h b/include/linux/of_clk.h
new file mode 100644 (file)
index 0000000..b27da9f
--- /dev/null
+++ b/include/linux/of_clk.h
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * OF clock helpers
+ */
+
+#ifndef __LINUX_OF_CLK_H
+#define __LINUX_OF_CLK_H
+
+#if defined(CONFIG_COMMON_CLK) && defined(CONFIG_OF)
+
+unsigned int of_clk_get_parent_count(struct device_node *np);
+const char *of_clk_get_parent_name(struct device_node *np, int index);
+void of_clk_init(const struct of_device_id *matches);
+
+#else /* !CONFIG_COMMON_CLK || !CONFIG_OF */
+
+static inline unsigned int of_clk_get_parent_count(struct device_node *np)
+{
+       return 0;
+}
+static inline const char *of_clk_get_parent_name(struct device_node *np,
+                                                int index)
+{
+       return NULL;
+}
+static inline void of_clk_init(const struct of_device_id *matches) {}
+
+#endif /* !CONFIG_COMMON_CLK || !CONFIG_OF */
+
+#endif /* __LINUX_OF_CLK_H */