clk: Constify clk_hw argument to provider APIs

We don't modify the clk_hw argument in these functions, so it's
safe to mark it as const.

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

drivers/clk/clk.c

@@ -278,7 +278,7 @@ const char *__clk_get_name(struct clk *clk)
 }
 EXPORT_SYMBOL_GPL(__clk_get_name);
 
-const char *clk_hw_get_name(struct clk_hw *hw)
+const char *clk_hw_get_name(const struct clk_hw *hw)
 {
 	return hw->core->name;
 }
@@ -290,13 +290,13 @@ struct clk_hw *__clk_get_hw(struct clk *clk)
 }
 EXPORT_SYMBOL_GPL(__clk_get_hw);
 
-unsigned int clk_hw_get_num_parents(struct clk_hw *hw)
+unsigned int clk_hw_get_num_parents(const struct clk_hw *hw)
 {
 	return hw->core->num_parents;
 }
 EXPORT_SYMBOL_GPL(clk_hw_get_num_parents);
 
-struct clk_hw *clk_hw_get_parent(struct clk_hw *hw)
+struct clk_hw *clk_hw_get_parent(const struct clk_hw *hw)
 {
 	return hw->core->parent ? hw->core->parent->hw : NULL;
 }
@@ -359,7 +359,8 @@ static struct clk_core *clk_core_get_parent_by_index(struct clk_core *core,
 		return core->parents[index];
 }
 
-struct clk_hw *clk_hw_get_parent_by_index(struct clk_hw *hw, unsigned int index)
+struct clk_hw *
+clk_hw_get_parent_by_index(const struct clk_hw *hw, unsigned int index)
 {
 	struct clk_core *parent;
 
@@ -395,7 +396,7 @@ out:
 	return ret;
 }
 
-unsigned long clk_hw_get_rate(struct clk_hw *hw)
+unsigned long clk_hw_get_rate(const struct clk_hw *hw)
 {
 	return clk_core_get_rate_nolock(hw->core);
 }
@@ -415,13 +416,13 @@ unsigned long __clk_get_flags(struct clk *clk)
 }
 EXPORT_SYMBOL_GPL(__clk_get_flags);
 
-unsigned long clk_hw_get_flags(struct clk_hw *hw)
+unsigned long clk_hw_get_flags(const struct clk_hw *hw)
 {
 	return hw->core->flags;
 }
 EXPORT_SYMBOL_GPL(clk_hw_get_flags);
 
-bool clk_hw_is_prepared(struct clk_hw *hw)
+bool clk_hw_is_prepared(const struct clk_hw *hw)
 {
 	return clk_core_is_prepared(hw->core);
 }

include/linux/clk-provider.h

@@ -607,17 +607,17 @@ void devm_clk_unregister(struct device *dev, struct clk *clk);
 
 /* helper functions */
 const char *__clk_get_name(struct clk *clk);
-const char *clk_hw_get_name(struct clk_hw *hw);
+const char *clk_hw_get_name(const struct clk_hw *hw);
 struct clk_hw *__clk_get_hw(struct clk *clk);
-unsigned int clk_hw_get_num_parents(struct clk_hw *hw);
-struct clk_hw *clk_hw_get_parent(struct clk_hw *hw);
-struct clk_hw *clk_hw_get_parent_by_index(struct clk_hw *hw,
+unsigned int clk_hw_get_num_parents(const struct clk_hw *hw);
+struct clk_hw *clk_hw_get_parent(const struct clk_hw *hw);
+struct clk_hw *clk_hw_get_parent_by_index(const struct clk_hw *hw,
 					  unsigned int index);
 unsigned int __clk_get_enable_count(struct clk *clk);
-unsigned long clk_hw_get_rate(struct clk_hw *hw);
+unsigned long clk_hw_get_rate(const struct clk_hw *hw);
 unsigned long __clk_get_flags(struct clk *clk);
-unsigned long clk_hw_get_flags(struct clk_hw *hw);
-bool clk_hw_is_prepared(struct clk_hw *hw);
+unsigned long clk_hw_get_flags(const struct clk_hw *hw);
+bool clk_hw_is_prepared(const struct clk_hw *hw);
 bool __clk_is_enabled(struct clk *clk);
 struct clk *__clk_lookup(const char *name);
 int __clk_mux_determine_rate(struct clk_hw *hw,