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, 76 insertions, 34 deletions

diff --git a/drivers/clk/clkdev.c b/drivers/clk/clkdev.c
index da4bda8b7fc7..043fd3633373 100644
--- a/drivers/clk/clkdev.c
+++ b/drivers/clk/clkdev.c
@@ -19,6 +19,7 @@
 #include <linux/mutex.h>
 #include <linux/clk.h>
 #include <linux/clkdev.h>
+#include <linux/clk-provider.h>
 #include <linux/of.h>
 
 #include "clk.h"
@@ -28,6 +29,20 @@ static DEFINE_MUTEX(clocks_mutex);
 
 #if defined(CONFIG_OF) && defined(CONFIG_COMMON_CLK)
 
+static struct clk *__of_clk_get_by_clkspec(struct of_phandle_args *clkspec,
+					 const char *dev_id, const char *con_id)
+{
+	struct clk *clk;
+
+	if (!clkspec)
+		return ERR_PTR(-EINVAL);
+
+	of_clk_lock();
+	clk = __of_clk_get_from_provider(clkspec, dev_id, con_id);
+	of_clk_unlock();
+	return clk;
+}
+
 /**
  * of_clk_get_by_clkspec() - Lookup a clock form a clock provider
  * @clkspec: pointer to a clock specifier data structure
@@ -38,22 +53,11 @@ static DEFINE_MUTEX(clocks_mutex);
  */
 struct clk *of_clk_get_by_clkspec(struct of_phandle_args *clkspec)
 {
-	struct clk *clk;
-
-	if (!clkspec)
-		return ERR_PTR(-EINVAL);
-
-	of_clk_lock();
-	clk = __of_clk_get_from_provider(clkspec);
-
-	if (!IS_ERR(clk) && !__clk_get(clk))
-		clk = ERR_PTR(-ENOENT);
-
-	of_clk_unlock();
-	return clk;
+	return __of_clk_get_by_clkspec(clkspec, NULL, __func__);
 }
 
-struct clk *of_clk_get(struct device_node *np, int index)
+static struct clk *__of_clk_get(struct device_node *np, int index,
+			       const char *dev_id, const char *con_id)
 {
 	struct of_phandle_args clkspec;
 	struct clk *clk;
@@ -67,22 +71,21 @@ struct clk *of_clk_get(struct device_node *np, int index)
 	if (rc)
 		return ERR_PTR(rc);
 
-	clk = of_clk_get_by_clkspec(&clkspec);
+	clk = __of_clk_get_by_clkspec(&clkspec, dev_id, con_id);
 	of_node_put(clkspec.np);
+
 	return clk;
 }
+
+struct clk *of_clk_get(struct device_node *np, int index)
+{
+	return __of_clk_get(np, index, np->full_name, NULL);
+}
 EXPORT_SYMBOL(of_clk_get);
 
-/**
- * of_clk_get_by_name() - Parse and lookup a clock referenced by a device node
- * @np: pointer to clock consumer node
- * @name: name of consumer's clock input, or NULL for the first clock reference
- *
- * This function parses the clocks and clock-names properties,
- * and uses them to look up the struct clk from the registered list of clock
- * providers.
- */
-struct clk *of_clk_get_by_name(struct device_node *np, const char *name)
+static struct clk *__of_clk_get_by_name(struct device_node *np,
+					const char *dev_id,
+					const char *name)
 {
 	struct clk *clk = ERR_PTR(-ENOENT);
 
@@ -97,10 +100,10 @@ struct clk *of_clk_get_by_name(struct device_node *np, const char *name)
 		 */
 		if (name)
 			index = of_property_match_string(np, "clock-names", name);
-		clk = of_clk_get(np, index);
-		if (!IS_ERR(clk))
+		clk = __of_clk_get(np, index, dev_id, name);
+		if (!IS_ERR(clk)) {
 			break;
-		else if (name && index >= 0) {
+		} else if (name && index >= 0) {
 			if (PTR_ERR(clk) != -EPROBE_DEFER)
 				pr_err("ERROR: could not get clock %s:%s(%i)\n",
 					np->full_name, name ? name : "", index);
@@ -119,7 +122,33 @@ struct clk *of_clk_get_by_name(struct device_node *np, const char *name)
 
 	return clk;
 }
+
+/**
+ * of_clk_get_by_name() - Parse and lookup a clock referenced by a device node
+ * @np: pointer to clock consumer node
+ * @name: name of consumer's clock input, or NULL for the first clock reference
+ *
+ * This function parses the clocks and clock-names properties,
+ * and uses them to look up the struct clk from the registered list of clock
+ * providers.
+ */
+struct clk *of_clk_get_by_name(struct device_node *np, const char *name)
+{
+	if (!np)
+		return ERR_PTR(-ENOENT);
+
+	return __of_clk_get_by_name(np, np->full_name, name);
+}
 EXPORT_SYMBOL(of_clk_get_by_name);
+
+#else /* defined(CONFIG_OF) && defined(CONFIG_COMMON_CLK) */
+
+static struct clk *__of_clk_get_by_name(struct device_node *np,
+					const char *dev_id,
+					const char *name)
+{
+	return ERR_PTR(-ENOENT);
+}
 #endif
 
 /*
@@ -168,14 +197,28 @@ static struct clk_lookup *clk_find(const char *dev_id, const char *con_id)
 struct clk *clk_get_sys(const char *dev_id, const char *con_id)
 {
 	struct clk_lookup *cl;
+	struct clk *clk = NULL;
 
 	mutex_lock(&clocks_mutex);
+
 	cl = clk_find(dev_id, con_id);
-	if (cl && !__clk_get(cl->clk))
+	if (!cl)
+		goto out;
+
+	clk = __clk_create_clk(__clk_get_hw(cl->clk), dev_id, con_id);
+	if (IS_ERR(clk))
+		goto out;
+
+	if (!__clk_get(clk)) {
+		__clk_free_clk(clk);
 		cl = NULL;
+		goto out;
+	}
+
+out:
 	mutex_unlock(&clocks_mutex);
 
-	return cl ? cl->clk : ERR_PTR(-ENOENT);
+	return cl ? clk : ERR_PTR(-ENOENT);
 }
 EXPORT_SYMBOL(clk_get_sys);
 
@@ -185,10 +228,8 @@ struct clk *clk_get(struct device *dev, const char *con_id)
 	struct clk *clk;
 
 	if (dev) {
-		clk = of_clk_get_by_name(dev->of_node, con_id);
-		if (!IS_ERR(clk))
-			return clk;
-		if (PTR_ERR(clk) == -EPROBE_DEFER)
+		clk = __of_clk_get_by_name(dev->of_node, dev_id, con_id);
+		if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER)
 			return clk;
 	}
 
@@ -331,6 +372,7 @@ int clk_register_clkdev(struct clk *clk, const char *con_id,
 
 	return 0;
 }
+EXPORT_SYMBOL(clk_register_clkdev);
 
 /**
  * clk_register_clkdevs - register a set of clk_lookup for a struct clk