5 files changed, 60 insertions, 1 deletions

diff --git a/include/linux/clk-private.h b/include/linux/clk-private.h
index 8138c94409f3..efbf70b9fd84 100644
--- a/include/linux/clk-private.h
+++ b/include/linux/clk-private.h
@@ -12,6 +12,7 @@
 #define __LINUX_CLK_PRIVATE_H
 
 #include <linux/clk-provider.h>
+#include <linux/kref.h>
 #include <linux/list.h>
 
 /*
@@ -25,10 +26,13 @@
 
 #ifdef CONFIG_COMMON_CLK
 
+struct module;
+
 struct clk {
         const char              *name;
         const struct clk_ops    *ops;
         struct clk_hw           *hw;
+        struct module           *owner;
         struct clk              *parent;
         const char              **parent_names;
         struct clk              **parents;
@@ -41,12 +45,14 @@ struct clk {
         unsigned long           flags;
         unsigned int            enable_count;
         unsigned int            prepare_count;
+        unsigned long           accuracy;
         struct hlist_head       children;
         struct hlist_node       child_node;
         unsigned int            notifier_count;
-#ifdef CONFIG_COMMON_CLK_DEBUG
+#ifdef CONFIG_DEBUG_FS
         struct dentry           *dentry;
 #endif
+        struct kref             ref;
 };
 
 /*
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index 7e59253b8603..999b28ba38f7 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -29,6 +29,7 @@
 #define CLK_IS_BASIC            BIT(5) /* Basic clk, can't do a to_clk_foo() */
 #define CLK_GET_RATE_NOCACHE    BIT(6) /* do not use the cached clk rate */
 #define CLK_SET_RATE_NO_REPARENT BIT(7) /* don't re-parent on rate change */
+#define CLK_GET_ACCURACY_NOCACHE BIT(8) /* do not use the cached clk accuracy */
 
 struct clk_hw;
 
@@ -108,6 +109,25 @@ struct clk_hw;
  *              which is likely helpful for most .set_rate implementation.
  *              Returns 0 on success, -EERROR otherwise.
  *
+ * @recalc_accuracy: Recalculate the accuracy of this clock. The clock accuracy
+ *              is expressed in ppb (parts per billion). The parent accuracy is
+ *              an input parameter.
+ *              Returns the calculated accuracy.  Optional - if this op is not
+ *              set then clock accuracy will be initialized to parent accuracy
+ *              or 0 (perfect clock) if clock has no parent.
+ *
+ * @set_rate_and_parent: Change the rate and the parent of this clock. The
+ *              requested rate is specified by the second argument, which
+ *              should typically be the return of .round_rate call.  The
+ *              third argument gives the parent rate which is likely helpful
+ *              for most .set_rate_and_parent implementation. The fourth
+ *              argument gives the parent index. This callback is optional (and
+ *              unnecessary) for clocks with 0 or 1 parents as well as
+ *              for clocks that can tolerate switching the rate and the parent
+ *              separately via calls to .set_parent and .set_rate.
+ *              Returns 0 on success, -EERROR otherwise.
+ *
+ *
  * The clk_enable/clk_disable and clk_prepare/clk_unprepare pairs allow
  * implementations to split any work between atomic (enable) and sleepable
  * (prepare) contexts.  If enabling a clock requires code that might sleep,
@@ -139,6 +159,11 @@ struct clk_ops {
         u8              (*get_parent)(struct clk_hw *hw);
         int             (*set_rate)(struct clk_hw *hw, unsigned long,
                                     unsigned long);
+        int             (*set_rate_and_parent)(struct clk_hw *hw,
+                                    unsigned long rate,
+                                    unsigned long parent_rate, u8 index);
+        unsigned long   (*recalc_accuracy)(struct clk_hw *hw,
+                                           unsigned long parent_accuracy);
         void            (*init)(struct clk_hw *hw);
 };
 
@@ -194,6 +219,7 @@ struct clk_hw {
 struct clk_fixed_rate {
         struct          clk_hw hw;
         unsigned long   fixed_rate;
+        unsigned long   fixed_accuracy;
         u8              flags;
 };
 
@@ -201,6 +227,9 @@ extern const struct clk_ops clk_fixed_rate_ops;
 struct clk *clk_register_fixed_rate(struct device *dev, const char *name,
                 const char *parent_name, unsigned long flags,
                 unsigned long fixed_rate);
+struct clk *clk_register_fixed_rate_with_accuracy(struct device *dev,
+                const char *name, const char *parent_name, unsigned long flags,
+                unsigned long fixed_rate, unsigned long fixed_accuracy);
 
 void of_fixed_clk_setup(struct device_node *np);
 
@@ -433,6 +462,7 @@ struct clk *clk_get_parent_by_index(struct clk *clk, u8 index);
 unsigned int __clk_get_enable_count(struct clk *clk);
 unsigned int __clk_get_prepare_count(struct clk *clk);
 unsigned long __clk_get_rate(struct clk *clk);
+unsigned long __clk_get_accuracy(struct clk *clk);
 unsigned long __clk_get_flags(struct clk *clk);
 bool __clk_is_prepared(struct clk *clk);
 bool __clk_is_enabled(struct clk *clk);
diff --git a/include/linux/clk.h b/include/linux/clk.h
index 9a6d04524b1a..0dd91148165e 100644
--- a/include/linux/clk.h
+++ b/include/linux/clk.h
@@ -82,6 +82,23 @@ int clk_notifier_register(struct clk *clk, struct notifier_block *nb);
 
 int clk_notifier_unregister(struct clk *clk, struct notifier_block *nb);
 
+/**
+ * clk_get_accuracy - obtain the clock accuracy in ppb (parts per billion)
+ *                    for a clock source.
+ * @clk: clock source
+ *
+ * This gets the clock source accuracy expressed in ppb.
+ * A perfect clock returns 0.
+ */
+long clk_get_accuracy(struct clk *clk);
+
+#else
+
+static inline long clk_get_accuracy(struct clk *clk)
+{
+        return -ENOTSUPP;
+}
+
 #endif
 
 /**
diff --git a/include/linux/clkdev.h b/include/linux/clkdev.h
index a6a6f603103b..94bad77eeb4a 100644
--- a/include/linux/clkdev.h
+++ b/include/linux/clkdev.h
@@ -43,4 +43,9 @@ int clk_add_alias(const char *, const char *, char *, struct device *);
 int clk_register_clkdev(struct clk *, const char *, const char *, ...);
 int clk_register_clkdevs(struct clk *, struct clk_lookup *, size_t);
 
+#ifdef CONFIG_COMMON_CLK
+int __clk_get(struct clk *clk);
+void __clk_put(struct clk *clk);
+#endif
+
 #endif
diff --git a/include/linux/reset-controller.h b/include/linux/reset-controller.h
index 2f61311ae3e0..41a4695fde08 100644
--- a/include/linux/reset-controller.h
+++ b/include/linux/reset-controller.h
@@ -21,6 +21,7 @@ struct reset_control_ops {
 
 struct module;
 struct device_node;
+struct of_phandle_args;
 
 /**
  * struct reset_controller_dev - reset controller entity that might