[PATCH 3/6] clk: allow to instanciate clk mux without registering it

[Lucas Stach]

Allows to reuse clk mux code within other clocks.

Signed-off-by: Lucas Stach <dev at lynxeye.de>
---
 drivers/clk/clk-mux.c | 29 ++++++++++++++++++++++++-----
 include/linux/clk.h   |  4 ++++
 2 files changed, 28 insertions(+), 5 deletions(-)

diff --git a/drivers/clk/clk-mux.c b/drivers/clk/clk-mux.c
index cb5f1a1..47efe12 100644
--- a/drivers/clk/clk-mux.c
+++ b/drivers/clk/clk-mux.c
@@ -27,6 +27,8 @@ struct clk_mux {
 	int width;
 };
 
+#define to_clk_mux(_clk) container_of(_clk, struct clk_mux, clk)
+
 static int clk_mux_get_parent(struct clk *clk)
 {
 	struct clk_mux *m = container_of(clk, struct clk_mux, clk);
@@ -53,11 +55,10 @@ struct clk_ops clk_mux_ops = {
 	.set_parent = clk_mux_set_parent,
 };
 
-struct clk *clk_mux(const char *name, void __iomem *reg,
+struct clk *clk_mux_alloc(const char *name, void __iomem *reg,
 		u8 shift, u8 width, const char **parents, u8 num_parents)
 {
 	struct clk_mux *m = xzalloc(sizeof(*m));
-	int ret;
 
 	m->reg = reg;
 	m->shift = shift;
@@ -67,11 +68,29 @@ struct clk *clk_mux(const char *name, void __iomem *reg,
 	m->clk.parent_names = parents;
 	m->clk.num_parents = num_parents;
 
-	ret = clk_register(&m->clk);
+	return &m->clk;
+}
+
+void clk_mux_free(struct clk *clk_mux)
+{
+	struct clk_mux *m = to_clk_mux(clk_mux);
+
+	free(m);
+}
+
+struct clk *clk_mux(const char *name, void __iomem *reg,
+		u8 shift, u8 width, const char **parents, u8 num_parents)
+{
+	struct clk *m;
+	int ret;
+
+	m = clk_mux_alloc(name, reg, shift, width, parents, num_parents);
+
+	ret = clk_register(m);
 	if (ret) {
-		free(m);
+		free(to_clk_mux(m));
 		return ERR_PTR(ret);
 	}
 
-	return &m->clk;
+	return m;
 }
diff --git a/include/linux/clk.h b/include/linux/clk.h
index cf41bd7..d5e5b6b 100644
--- a/include/linux/clk.h
+++ b/include/linux/clk.h
@@ -197,6 +197,10 @@ struct clk *clk_divider_table(const char *name,
 		const struct clk_div_table *table);
 struct clk *clk_fixed_factor(const char *name,
 		const char *parent, unsigned int mult, unsigned int div);
+
+struct clk *clk_mux_alloc(const char *name, void __iomem *reg,
+		u8 shift, u8 width, const char **parents, u8 num_parents);
+void clk_mux_free(struct clk *clk_mux);
 struct clk *clk_mux(const char *name, void __iomem *reg,
 		u8 shift, u8 width, const char **parents, u8 num_parents);
 
-- 
1.8.2.1