clk: divider: 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 divider 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.

Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lkml.kernel.org/r/20190830150923.259497-13-sboyd@kernel.org
[sboyd@kernel.org: Export __clk_hw_register_divider]

diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c
index 098b2b0..8de12cb 100644 (file)
--- a/drivers/clk/clk-divider.c
+++ b/drivers/clk/clk-divider.c
@@ -463,11 +463,12 @@ const struct clk_ops clk_divider_ro_ops = {
 };
 EXPORT_SYMBOL_GPL(clk_divider_ro_ops);
 
-static struct clk_hw *_register_divider(struct device *dev, const char *name,
-               const char *parent_name, unsigned long flags,
-               void __iomem *reg, u8 shift, u8 width,
-               u8 clk_divider_flags, const struct clk_div_table *table,
-               spinlock_t *lock)
+struct clk_hw *__clk_hw_register_divider(struct device *dev,
+               struct device_node *np, const char *name,
+               const char *parent_name, const struct clk_hw *parent_hw,
+               const struct clk_parent_data *parent_data, unsigned long flags,
+               void __iomem *reg, u8 shift, u8 width, u8 clk_divider_flags,
+               const struct clk_div_table *table, spinlock_t *lock)
 {
        struct clk_divider *div;
        struct clk_hw *hw;
@@ -514,55 +515,7 @@ static struct clk_hw *_register_divider(struct device *dev, const char *name,
 
        return hw;
 }
-
-/**
- * clk_register_divider - register a divider clock with the clock framework
- * @dev: device registering this clock
- * @name: name of this clock
- * @parent_name: name of clock's parent
- * @flags: framework-specific flags
- * @reg: register address to adjust divider
- * @shift: number of bits to shift the bitfield
- * @width: width of the bitfield
- * @clk_divider_flags: divider-specific flags for this clock
- * @lock: shared register lock for this clock
- */
-struct clk *clk_register_divider(struct device *dev, const char *name,
-               const char *parent_name, unsigned long flags,
-               void __iomem *reg, u8 shift, u8 width,
-               u8 clk_divider_flags, spinlock_t *lock)
-{
-       struct clk_hw *hw;
-
-       hw =  _register_divider(dev, name, parent_name, flags, reg, shift,
-                       width, clk_divider_flags, NULL, lock);
-       if (IS_ERR(hw))
-               return ERR_CAST(hw);
-       return hw->clk;
-}
-EXPORT_SYMBOL_GPL(clk_register_divider);
-
-/**
- * clk_hw_register_divider - register a divider clock with the clock framework
- * @dev: device registering this clock
- * @name: name of this clock
- * @parent_name: name of clock's parent
- * @flags: framework-specific flags
- * @reg: register address to adjust divider
- * @shift: number of bits to shift the bitfield
- * @width: width of the bitfield
- * @clk_divider_flags: divider-specific flags for this clock
- * @lock: shared register lock for this clock
- */
-struct clk_hw *clk_hw_register_divider(struct device *dev, const char *name,
-               const char *parent_name, unsigned long flags,
-               void __iomem *reg, u8 shift, u8 width,
-               u8 clk_divider_flags, spinlock_t *lock)
-{
-       return _register_divider(dev, name, parent_name, flags, reg, shift,
-                       width, clk_divider_flags, NULL, lock);
-}
-EXPORT_SYMBOL_GPL(clk_hw_register_divider);
+EXPORT_SYMBOL_GPL(__clk_hw_register_divider);
 
 /**
  * clk_register_divider_table - register a table based divider clock with
@@ -586,39 +539,15 @@ struct clk *clk_register_divider_table(struct device *dev, const char *name,
 {
        struct clk_hw *hw;
 
-       hw =  _register_divider(dev, name, parent_name, flags, reg, shift,
-                       width, clk_divider_flags, table, lock);
+       hw =  __clk_hw_register_divider(dev, NULL, name, parent_name, NULL,
+                       NULL, flags, reg, shift, width, clk_divider_flags,
+                       table, lock);
        if (IS_ERR(hw))
                return ERR_CAST(hw);
        return hw->clk;
 }
 EXPORT_SYMBOL_GPL(clk_register_divider_table);
 
-/**
- * clk_hw_register_divider_table - register a table based divider clock with
- * the clock framework
- * @dev: device registering this clock
- * @name: name of this clock
- * @parent_name: name of clock's parent
- * @flags: framework-specific flags
- * @reg: register address to adjust divider
- * @shift: number of bits to shift the bitfield
- * @width: width of the bitfield
- * @clk_divider_flags: divider-specific flags for this clock
- * @table: array of divider/value pairs ending with a div set to 0
- * @lock: shared register lock for this clock
- */
-struct clk_hw *clk_hw_register_divider_table(struct device *dev,
-               const char *name, const char *parent_name, unsigned long flags,
-               void __iomem *reg, u8 shift, u8 width,
-               u8 clk_divider_flags, const struct clk_div_table *table,
-               spinlock_t *lock)
-{
-       return _register_divider(dev, name, parent_name, flags, reg, shift,
-                       width, clk_divider_flags, table, lock);
-}
-EXPORT_SYMBOL_GPL(clk_hw_register_divider_table);
-
 void clk_unregister_divider(struct clk *clk)
 {
        struct clk_divider *div;

diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index 152aeb5..be0d22d 100644 (file)
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -626,24 +626,153 @@ int divider_get_val(unsigned long rate, unsigned long parent_rate,
                const struct clk_div_table *table, u8 width,
                unsigned long flags);
 
-struct clk *clk_register_divider(struct device *dev, const char *name,
-               const char *parent_name, unsigned long flags,
-               void __iomem *reg, u8 shift, u8 width,
-               u8 clk_divider_flags, spinlock_t *lock);
-struct clk_hw *clk_hw_register_divider(struct device *dev, const char *name,
-               const char *parent_name, unsigned long flags,
-               void __iomem *reg, u8 shift, u8 width,
-               u8 clk_divider_flags, spinlock_t *lock);
+struct clk_hw *__clk_hw_register_divider(struct device *dev,
+               struct device_node *np, const char *name,
+               const char *parent_name, const struct clk_hw *parent_hw,
+               const struct clk_parent_data *parent_data, unsigned long flags,
+               void __iomem *reg, u8 shift, u8 width, u8 clk_divider_flags,
+               const struct clk_div_table *table, spinlock_t *lock);
 struct clk *clk_register_divider_table(struct device *dev, const char *name,
                const char *parent_name, unsigned long flags,
                void __iomem *reg, u8 shift, u8 width,
                u8 clk_divider_flags, const struct clk_div_table *table,
                spinlock_t *lock);
-struct clk_hw *clk_hw_register_divider_table(struct device *dev,
-               const char *name, const char *parent_name, unsigned long flags,
-               void __iomem *reg, u8 shift, u8 width,
-               u8 clk_divider_flags, const struct clk_div_table *table,
-               spinlock_t *lock);
+/**
+ * clk_register_divider - register a divider clock with the clock framework
+ * @dev: device registering this clock
+ * @name: name of this clock
+ * @parent_name: name of clock's parent
+ * @flags: framework-specific flags
+ * @reg: register address to adjust divider
+ * @shift: number of bits to shift the bitfield
+ * @width: width of the bitfield
+ * @clk_divider_flags: divider-specific flags for this clock
+ * @lock: shared register lock for this clock
+ */
+#define clk_register_divider(dev, name, parent_name, flags, reg, shift, width, \
+                            clk_divider_flags, lock)                          \
+       clk_register_divider_table((dev), (name), (parent_name), (flags),      \
+                                  (reg), (shift), (width),                    \
+                                  (clk_divider_flags), NULL, (lock))
+/**
+ * clk_hw_register_divider - register a divider clock with the clock framework
+ * @dev: device registering this clock
+ * @name: name of this clock
+ * @parent_name: name of clock's parent
+ * @flags: framework-specific flags
+ * @reg: register address to adjust divider
+ * @shift: number of bits to shift the bitfield
+ * @width: width of the bitfield
+ * @clk_divider_flags: divider-specific flags for this clock
+ * @lock: shared register lock for this clock
+ */
+#define clk_hw_register_divider(dev, name, parent_name, flags, reg, shift,    \
+                               width, clk_divider_flags, lock)               \
+       __clk_hw_register_divider((dev), NULL, (name), (parent_name), NULL,   \
+                                 NULL, (flags), (reg), (shift), (width),     \
+                                 (clk_divider_flags), NULL, (lock))
+/**
+ * clk_hw_register_divider_parent_hw - register a divider clock with the clock
+ * framework
+ * @dev: device registering this clock
+ * @name: name of this clock
+ * @parent_hw: pointer to parent clk
+ * @flags: framework-specific flags
+ * @reg: register address to adjust divider
+ * @shift: number of bits to shift the bitfield
+ * @width: width of the bitfield
+ * @clk_divider_flags: divider-specific flags for this clock
+ * @lock: shared register lock for this clock
+ */
+#define clk_hw_register_divider_parent_hw(dev, name, parent_hw, flags, reg,   \
+                                         shift, width, clk_divider_flags,    \
+                                         lock)                               \
+       __clk_hw_register_divider((dev), NULL, (name), NULL, (parent_hw),     \
+                                 NULL, (flags), (reg), (shift), (width),     \
+                                 (clk_divider_flags), NULL, (lock))
+/**
+ * clk_hw_register_divider_parent_data - register a divider clock with the clock
+ * framework
+ * @dev: device registering this clock
+ * @name: name of this clock
+ * @parent_data: parent clk data
+ * @flags: framework-specific flags
+ * @reg: register address to adjust divider
+ * @shift: number of bits to shift the bitfield
+ * @width: width of the bitfield
+ * @clk_divider_flags: divider-specific flags for this clock
+ * @lock: shared register lock for this clock
+ */
+#define clk_hw_register_divider_parent_data(dev, name, parent_data, flags,    \
+                                           reg, shift, width,                \
+                                           clk_divider_flags, lock)          \
+       __clk_hw_register_divider((dev), NULL, (name), NULL, NULL,            \
+                                 (parent_data), (flags), (reg), (shift),     \
+                                 (width), (clk_divider_flags), NULL, (lock))
+/**
+ * clk_hw_register_divider_table - register a table based divider clock with
+ * the clock framework
+ * @dev: device registering this clock
+ * @name: name of this clock
+ * @parent_name: name of clock's parent
+ * @flags: framework-specific flags
+ * @reg: register address to adjust divider
+ * @shift: number of bits to shift the bitfield
+ * @width: width of the bitfield
+ * @clk_divider_flags: divider-specific flags for this clock
+ * @table: array of divider/value pairs ending with a div set to 0
+ * @lock: shared register lock for this clock
+ */
+#define clk_hw_register_divider_table(dev, name, parent_name, flags, reg,     \
+                                     shift, width, clk_divider_flags, table, \
+                                     lock)                                   \
+       __clk_hw_register_divider((dev), NULL, (name), (parent_name), NULL,   \
+                                 NULL, (flags), (reg), (shift), (width),     \
+                                 (clk_divider_flags), (table), (lock))
+/**
+ * clk_hw_register_divider_table_parent_hw - register a table based divider
+ * clock with the clock framework
+ * @dev: device registering this clock
+ * @name: name of this clock
+ * @parent_hw: pointer to parent clk
+ * @flags: framework-specific flags
+ * @reg: register address to adjust divider
+ * @shift: number of bits to shift the bitfield
+ * @width: width of the bitfield
+ * @clk_divider_flags: divider-specific flags for this clock
+ * @table: array of divider/value pairs ending with a div set to 0
+ * @lock: shared register lock for this clock
+ */
+#define clk_hw_register_divider_table_parent_hw(dev, name, parent_hw, flags,  \
+                                               reg, shift, width,            \
+                                               clk_divider_flags, table,     \
+                                               lock)                         \
+       __clk_hw_register_divider((dev), NULL, (name), NULL, (parent_hw),     \
+                                 NULL, (flags), (reg), (shift), (width),     \
+                                 (clk_divider_flags), (table), (lock))
+/**
+ * clk_hw_register_divider_table_parent_data - register a table based divider
+ * clock with the clock framework
+ * @dev: device registering this clock
+ * @name: name of this clock
+ * @parent_data: parent clk data
+ * @flags: framework-specific flags
+ * @reg: register address to adjust divider
+ * @shift: number of bits to shift the bitfield
+ * @width: width of the bitfield
+ * @clk_divider_flags: divider-specific flags for this clock
+ * @table: array of divider/value pairs ending with a div set to 0
+ * @lock: shared register lock for this clock
+ */
+#define clk_hw_register_divider_table_parent_data(dev, name, parent_data,     \
+                                                 flags, reg, shift, width,   \
+                                                 clk_divider_flags, table,   \
+                                                 lock)                       \
+       __clk_hw_register_divider((dev), NULL, (name), NULL, NULL,            \
+                                 (parent_data), (flags), (reg), (shift),     \
+                                 (width), (clk_divider_flags), (table),      \
+                                 (lock))
+
 void clk_unregister_divider(struct clk *clk);
 void clk_hw_unregister_divider(struct clk_hw *hw);