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, 38 insertions, 18 deletions

diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index 89ca2c42763b..cffa8dfaebf6 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -645,28 +645,48 @@ struct clk_mux {
 extern const struct clk_ops clk_mux_ops;
 extern const struct clk_ops clk_mux_ro_ops;
 
-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);
-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);
-
-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,
+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_hw *clk_hw_register_mux_table(struct device *dev, const char *name,
+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);
 
+#define clk_register_mux(dev, name, parent_names, num_parents, flags, reg,    \
+			 shift, width, clk_mux_flags, lock)		      \
+	clk_register_mux_table((dev), (name), (parent_names), (num_parents),  \
+			       (flags), (reg), (shift), BIT((width)) - 1,     \
+			       (clk_mux_flags), NULL, (lock))
+#define clk_hw_register_mux_table(dev, name, parent_names, num_parents,	      \
+				  flags, reg, shift, mask, clk_mux_flags,     \
+				  table, lock)				      \
+	__clk_hw_register_mux((dev), NULL, (name), (num_parents),	      \
+			      (parent_names), NULL, NULL, (flags), (reg),     \
+			      (shift), (mask), (clk_mux_flags), (table),      \
+			      (lock))
+#define clk_hw_register_mux(dev, name, parent_names, num_parents, flags, reg, \
+			    shift, width, clk_mux_flags, lock)		      \
+	__clk_hw_register_mux((dev), NULL, (name), (num_parents),	      \
+			      (parent_names), NULL, NULL, (flags), (reg),     \
+			      (shift), BIT((width)) - 1, (clk_mux_flags),     \
+			      NULL, (lock))
+#define clk_hw_register_mux_hws(dev, name, parent_hws, num_parents, flags,    \
+				reg, shift, width, clk_mux_flags, lock)	      \
+	__clk_hw_register_mux((dev), NULL, (name), (num_parents), NULL,	      \
+			      (parent_hws), NULL, (flags), (reg), (shift),    \
+			      BIT((width)) - 1, (clk_mux_flags), NULL, (lock))
+#define clk_hw_register_mux_parent_data(dev, name, parent_data, num_parents,  \
+					flags, reg, shift, width,	      \
+					clk_mux_flags, lock)		      \
+	__clk_hw_register_mux((dev), NULL, (name), (num_parents), NULL, NULL, \
+			      (parent_data), (flags), (reg), (shift),	      \
+			      BIT((width)) - 1, (clk_mux_flags), NULL, (lock))
+
 int clk_mux_val_to_index(struct clk_hw *hw, u32 *table, unsigned int flags,
 			 unsigned int val);
 unsigned int clk_mux_index_to_val(u32 *table, unsigned int flags, u8 index);