Merge tag 'clk-for-linus-3.20' of git://git.linaro.org/people/mike.turquette/linux

Pull clock framework updates from Mike Turquette:
 "The clock framework changes contain the usual driver additions,
  enhancements and fixes mostly for ARM32, ARM64, MIPS and Power-based
  devices.

  Additionally the framework core underwent a bit of surgery with two
  major changes:

   - The boundary between the clock core and clock providers (e.g clock
     drivers) is now more well defined with dedicated provider helper
     functions.  struct clk no longer maps 1:1 with the hardware clock
     but is a true per-user cookie which helps us tracker users of
     hardware clocks and debug bad behavior.

   - The addition of rate constraints for clocks.  Rate ranges are now
     supported which are analogous to the voltage ranges in the
     regulator framework.

  Unfortunately these changes to the core created some breakeage.  We
  think we fixed it all up but for this reason there are lots of last
  minute commits trying to undo the damage"

* tag 'clk-for-linus-3.20' of git://git.linaro.org/people/mike.turquette/linux: (113 commits)
  clk: Only recalculate the rate if needed
  Revert "clk: mxs: Fix invalid 32-bit access to frac registers"
  clk: qoriq: Add support for the platform PLL
  powerpc/corenet: Enable CLK_QORIQ
  clk: Replace explicit clk assignment with __clk_hw_set_clk
  clk: Add __clk_hw_set_clk helper function
  clk: Don't dereference parent clock if is NULL
  MIPS: Alchemy: Remove bogus args from alchemy_clk_fgcs_detr
  clkdev: Always allocate a struct clk and call __clk_get() w/ CCF
  clk: shmobile: div6: Avoid division by zero in .round_rate()
  clk: mxs: Fix invalid 32-bit access to frac registers
  clk: omap: compile legacy omap3 clocks conditionally
  clkdev: Export clk_register_clkdev
  clk: Add rate constraints to clocks
  clk: remove clk-private.h
  pci: xgene: do not use clk-private.h
  arm: omap2+ remove dead clock code
  clk: Make clk API return per-user struct clk instances
  clk: tegra: Define PLLD_DSI and remove dsia(b)_mux
  clk: tegra: Add support for the Tegra132 CAR IP block
  ...

1 files changed, 49 insertions, 9 deletions

diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index d936409520f8..5591ea71a8d1 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -33,6 +33,7 @@
 #define CLK_GET_ACCURACY_NOCACHE BIT(8) /* do not use the cached clk accuracy */
 
 struct clk_hw;
+struct clk_core;
 struct dentry;
 
 /**
@@ -174,9 +175,12 @@ struct clk_ops {
 					unsigned long parent_rate);
 	long		(*round_rate)(struct clk_hw *hw, unsigned long rate,
 					unsigned long *parent_rate);
-	long		(*determine_rate)(struct clk_hw *hw, unsigned long rate,
-					unsigned long *best_parent_rate,
-					struct clk_hw **best_parent_hw);
+	long		(*determine_rate)(struct clk_hw *hw,
+					  unsigned long rate,
+					  unsigned long min_rate,
+					  unsigned long max_rate,
+					  unsigned long *best_parent_rate,
+					  struct clk_hw **best_parent_hw);
 	int		(*set_parent)(struct clk_hw *hw, u8 index);
 	u8		(*get_parent)(struct clk_hw *hw);
 	int		(*set_rate)(struct clk_hw *hw, unsigned long rate,
@@ -216,13 +220,17 @@ struct clk_init_data {
  * clk_foo and then referenced by the struct clk instance that uses struct
  * clk_foo's clk_ops
  *
- * @clk: pointer to the struct clk instance that points back to this struct
- * clk_hw instance
+ * @core: pointer to the struct clk_core instance that points back to this
+ * struct clk_hw instance
+ *
+ * @clk: pointer to the per-user struct clk instance that can be used to call
+ * into the clk API
  *
  * @init: pointer to struct clk_init_data that contains the init data shared
  * with the common clock framework.
  */
 struct clk_hw {
+	struct clk_core *core;
 	struct clk *clk;
 	const struct clk_init_data *init;
 };
@@ -294,6 +302,7 @@ struct clk *clk_register_gate(struct device *dev, const char *name,
 		const char *parent_name, unsigned long flags,
 		void __iomem *reg, u8 bit_idx,
 		u8 clk_gate_flags, spinlock_t *lock);
+void clk_unregister_gate(struct clk *clk);
 
 struct clk_div_table {
 	unsigned int	val;
@@ -352,6 +361,17 @@ struct clk_divider {
 #define CLK_DIVIDER_READ_ONLY		BIT(5)
 
 extern const struct clk_ops clk_divider_ops;
+
+unsigned long divider_recalc_rate(struct clk_hw *hw, unsigned long parent_rate,
+		unsigned int val, const struct clk_div_table *table,
+		unsigned long flags);
+long divider_round_rate(struct clk_hw *hw, unsigned long rate,
+		unsigned long *prate, const struct clk_div_table *table,
+		u8 width, unsigned long flags);
+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,
@@ -361,6 +381,7 @@ struct clk *clk_register_divider_table(struct device *dev, const char *name,
 		void __iomem *reg, u8 shift, u8 width,
 		u8 clk_divider_flags, const struct clk_div_table *table,
 		spinlock_t *lock);
+void clk_unregister_divider(struct clk *clk);
 
 /**
  * struct clk_mux - multiplexer clock
@@ -382,6 +403,8 @@ struct clk *clk_register_divider_table(struct device *dev, const char *name,
  *	register, and mask of mux bits are in higher 16-bit of this register.
  *	While setting the mux bits, higher 16-bit should also be updated to
  *	indicate changing mux bits.
+ * CLK_MUX_ROUND_CLOSEST - Use the parent rate that is closest to the desired
+ *	frequency.
  */
 struct clk_mux {
 	struct clk_hw	hw;
@@ -396,7 +419,8 @@ struct clk_mux {
 #define CLK_MUX_INDEX_ONE		BIT(0)
 #define CLK_MUX_INDEX_BIT		BIT(1)
 #define CLK_MUX_HIWORD_MASK		BIT(2)
-#define CLK_MUX_READ_ONLY	BIT(3) /* mux setting cannot be changed */
+#define CLK_MUX_READ_ONLY		BIT(3) /* mux can't be changed */
+#define CLK_MUX_ROUND_CLOSEST		BIT(4)
 
 extern const struct clk_ops clk_mux_ops;
 extern const struct clk_ops clk_mux_ro_ops;
@@ -411,6 +435,8 @@ struct clk *clk_register_mux_table(struct device *dev, const char *name,
 		void __iomem *reg, u8 shift, u32 mask,
 		u8 clk_mux_flags, u32 *table, spinlock_t *lock);
 
+void clk_unregister_mux(struct clk *clk);
+
 void of_fixed_factor_clk_setup(struct device_node *node);
 
 /**
@@ -550,15 +576,29 @@ bool __clk_is_prepared(struct clk *clk);
 bool __clk_is_enabled(struct clk *clk);
 struct clk *__clk_lookup(const char *name);
 long __clk_mux_determine_rate(struct clk_hw *hw, unsigned long rate,
+			      unsigned long min_rate,
+			      unsigned long max_rate,
 			      unsigned long *best_parent_rate,
 			      struct clk_hw **best_parent_p);
+unsigned long __clk_determine_rate(struct clk_hw *core,
+				   unsigned long rate,
+				   unsigned long min_rate,
+				   unsigned long max_rate);
+long __clk_mux_determine_rate_closest(struct clk_hw *hw, unsigned long rate,
+			      unsigned long min_rate,
+			      unsigned long max_rate,
+			      unsigned long *best_parent_rate,
+			      struct clk_hw **best_parent_p);
+
+static inline void __clk_hw_set_clk(struct clk_hw *dst, struct clk_hw *src)
+{
+	dst->clk = src->clk;
+	dst->core = src->core;
+}
 
 /*
  * FIXME clock api without lock protection
  */
-int __clk_prepare(struct clk *clk);
-void __clk_unprepare(struct clk *clk);
-void __clk_reparent(struct clk *clk, struct clk *new_parent);
 unsigned long __clk_round_rate(struct clk *clk, unsigned long rate);
 
 struct of_device_id;