clk: mux: Add support for specifying parents via DT/pointers

After commit fc0c209c147f ("clk: Allow parents to be specified without
string names") we can use DT or direct clk_hw pointers to specify
parents. Create a generic function that shouldn't be used very often to
encode the multitude of ways of registering a mux clk with different
parent information. Then add a bunch of wrapper macros that only pass
down what needs to be passed down to the generic function to support
this with less arguments.

Note: the msm drm driver passes an anonymous array through the macro
which seems to confuse my compiler. Adding a parenthesis around the
whole thing at the call site seems to fix it but it must be wrong. Maybe
it's better to split this patch and pick out the array bits there?

Cc: Rob Clark <robdclark@gmail.com>
Cc: Sean Paul <sean@poorly.run>
Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lkml.kernel.org/r/20190830150923.259497-11-sboyd@kernel.org

1 files changed, 18 insertions, 40 deletions

diff --git a/drivers/clk/clk-mux.c b/drivers/clk/clk-mux.c
index 570b6e5b603b..e54e79714818 100644
--- a/drivers/clk/clk-mux.c
+++ b/drivers/clk/clk-mux.c
@@ -145,17 +145,19 @@ const struct clk_ops clk_mux_ro_ops = {
 };
 EXPORT_SYMBOL_GPL(clk_mux_ro_ops);
 
-struct clk_hw *clk_hw_register_mux_table(struct device *dev, const char *name,
-		const char * const *parent_names, u8 num_parents,
-		unsigned long flags,
-		void __iomem *reg, u8 shift, u32 mask,
+struct clk_hw *__clk_hw_register_mux(struct device *dev, struct device_node *np,
+		const char *name, u8 num_parents,
+		const char * const *parent_names,
+		const struct clk_hw **parent_hws,
+		const struct clk_parent_data *parent_data,
+		unsigned long flags, void __iomem *reg, u8 shift, u32 mask,
 		u8 clk_mux_flags, u32 *table, spinlock_t *lock)
 {
 	struct clk_mux *mux;
 	struct clk_hw *hw;
 	struct clk_init_data init = {};
 	u8 width = 0;
-	int ret;
+	int ret = -EINVAL;
 
 	if (clk_mux_flags & CLK_MUX_HIWORD_MASK) {
 		width = fls(mask) - ffs(mask) + 1;
@@ -177,6 +179,8 @@ struct clk_hw *clk_hw_register_mux_table(struct device *dev, const char *name,
 		init.ops = &clk_mux_ops;
 	init.flags = flags;
 	init.parent_names = parent_names;
+	init.parent_data = parent_data;
+	init.parent_hws = parent_hws;
 	init.num_parents = num_parents;
 
 	/* struct clk_mux assignments */
@@ -189,7 +193,10 @@ struct clk_hw *clk_hw_register_mux_table(struct device *dev, const char *name,
 	mux->hw.init = &init;
 
 	hw = &mux->hw;
-	ret = clk_hw_register(dev, hw);
+	if (dev || !np)
+		ret = clk_hw_register(dev, hw);
+	else if (np)
+		ret = of_clk_hw_register(np, hw);
 	if (ret) {
 		kfree(mux);
 		hw = ERR_PTR(ret);
@@ -197,53 +204,24 @@ struct clk_hw *clk_hw_register_mux_table(struct device *dev, const char *name,
 
 	return hw;
 }
-EXPORT_SYMBOL_GPL(clk_hw_register_mux_table);
+EXPORT_SYMBOL_GPL(__clk_hw_register_mux);
 
 struct clk *clk_register_mux_table(struct device *dev, const char *name,
 		const char * const *parent_names, u8 num_parents,
-		unsigned long flags,
-		void __iomem *reg, u8 shift, u32 mask,
+		unsigned long flags, void __iomem *reg, u8 shift, u32 mask,
 		u8 clk_mux_flags, u32 *table, spinlock_t *lock)
 {
 	struct clk_hw *hw;
 
-	hw = clk_hw_register_mux_table(dev, name, parent_names, num_parents,
-				       flags, reg, shift, mask, clk_mux_flags,
-				       table, lock);
+	hw = clk_hw_register_mux_table(dev, name, parent_names,
+				       num_parents, flags, reg, shift, mask,
+				       clk_mux_flags, table, lock);
 	if (IS_ERR(hw))
 		return ERR_CAST(hw);
 	return hw->clk;
 }
 EXPORT_SYMBOL_GPL(clk_register_mux_table);
 
-struct clk *clk_register_mux(struct device *dev, const char *name,
-		const char * const *parent_names, u8 num_parents,
-		unsigned long flags,
-		void __iomem *reg, u8 shift, u8 width,
-		u8 clk_mux_flags, spinlock_t *lock)
-{
-	u32 mask = BIT(width) - 1;
-
-	return clk_register_mux_table(dev, name, parent_names, num_parents,
-				      flags, reg, shift, mask, clk_mux_flags,
-				      NULL, lock);
-}
-EXPORT_SYMBOL_GPL(clk_register_mux);
-
-struct clk_hw *clk_hw_register_mux(struct device *dev, const char *name,
-		const char * const *parent_names, u8 num_parents,
-		unsigned long flags,
-		void __iomem *reg, u8 shift, u8 width,
-		u8 clk_mux_flags, spinlock_t *lock)
-{
-	u32 mask = BIT(width) - 1;
-
-	return clk_hw_register_mux_table(dev, name, parent_names, num_parents,
-				      flags, reg, shift, mask, clk_mux_flags,
-				      NULL, lock);
-}
-EXPORT_SYMBOL_GPL(clk_hw_register_mux);
-
 void clk_unregister_mux(struct clk *clk)
 {
 	struct clk_mux *mux;