[PATCH 05/24] clk: introduce clk_register()

[Sascha Hauer]

This introduces a clk_register() with the same semantics as in Linux.
This also adds a struct clk_init_data. With this it becomes easier to
port over new clock drivers from Linux.

Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
Reviewed-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
---
 drivers/clk/clk.c   | 37 +++++++++++++++++++++++++++++++++++++
 include/linux/clk.h |  2 ++
 2 files changed, 39 insertions(+)

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 73682126bf..74e2f5d783 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -345,6 +345,43 @@ out:
 	return ret;
 }
 
+struct clk *clk_register(struct device_d *dev, struct clk_hw *hw)
+{
+	struct clk *clk;
+	const struct clk_init_data *init = hw->init;
+	char **parent_names;
+	int i, ret;
+
+	if (!hw->init)
+		return ERR_PTR(-EINVAL);
+
+	clk = clk_hw_to_clk(hw);
+
+	memset(clk, 0, sizeof(*clk));
+
+	clk->name = xstrdup(init->name);
+	clk->ops = init->ops;
+	clk->num_parents = init->num_parents;
+	parent_names = xzalloc(init->num_parents * sizeof(char *));
+
+	for (i = 0; i < init->num_parents; i++)
+		parent_names[i] = xstrdup(init->parent_names[i]);
+
+	clk->parent_names = (const char *const*)parent_names;
+
+	clk->flags = init->flags;
+
+	ret = bclk_register(clk);
+	if (ret) {
+		for (i = 0; i < init->num_parents; i++)
+			free(parent_names[i]);
+		free(parent_names);
+		return ERR_PTR(ret);
+	}
+
+	return clk;
+}
+
 int clk_is_enabled(struct clk *clk)
 {
 	int enabled;
diff --git a/include/linux/clk.h b/include/linux/clk.h
index 66ac6a9f14..654845023a 100644
--- a/include/linux/clk.h
+++ b/include/linux/clk.h
@@ -399,6 +399,7 @@ struct clk {
  */
 struct clk_hw {
 	struct clk clk;
+	const struct clk_init_data *init;
 };
 
 static inline struct clk *clk_hw_to_clk(struct clk_hw *hw)
@@ -547,6 +548,7 @@ int clk_parent_set_rate(struct clk_hw *hw, unsigned long rate,
 				unsigned long parent_rate);
 
 int bclk_register(struct clk *clk);
+struct clk *clk_register(struct device_d *dev, struct clk_hw *hw);
 
 struct clk *clk_lookup(const char *name);
 
-- 
2.29.2