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authorLinus Torvalds <torvalds@linux-foundation.org>2012-05-21 15:59:46 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-05-21 15:59:46 -0700
commit4f6ade91532b5b05ea28219b891f12a3cec528cd (patch)
tree8a684205449b2db0798fc22c9f03c40afa9cc849 /include
parent31a67102f4762df5544bc2dfb34a931233d2a5b2 (diff)
parente9d7f4065408e92338a41b809e437c6e043da090 (diff)
downloadlinux-4f6ade91532b5b05ea28219b891f12a3cec528cd.tar.gz
Merge branch 'clkdev' of git://git.linaro.org/people/rmk/linux-arm
Pull clkdev updates from Russell King: "This supplements clkdev with a device-managed API, allowing drivers cleanup paths to be simplified. We also optimize clk_find() so that it exits as soon as it finds a perfect match, and we provide a way to minimise the amount of code platforms need to register clkdev entries. Some of the code in arm-soc depends on these changes." * 'clkdev' of git://git.linaro.org/people/rmk/linux-arm: CLKDEV: provide helpers for common clock framework ARM: 7392/1: CLKDEV: Optimize clk_find() ARM: 7376/1: clkdev: Implement managed clk_get()
Diffstat (limited to 'include')
-rw-r--r--include/linux/clk.h32
-rw-r--r--include/linux/clkdev.h3
2 files changed, 35 insertions, 0 deletions
diff --git a/include/linux/clk.h b/include/linux/clk.h
index b0252726df6..70cf722ac3a 100644
--- a/include/linux/clk.h
+++ b/include/linux/clk.h
@@ -101,6 +101,26 @@ int clk_notifier_unregister(struct clk *clk, struct notifier_block *nb);
struct clk *clk_get(struct device *dev, const char *id);
/**
+ * devm_clk_get - lookup and obtain a managed reference to a clock producer.
+ * @dev: device for clock "consumer"
+ * @id: clock comsumer ID
+ *
+ * Returns a struct clk corresponding to the clock producer, or
+ * valid IS_ERR() condition containing errno. The implementation
+ * uses @dev and @id to determine the clock consumer, and thereby
+ * the clock producer. (IOW, @id may be identical strings, but
+ * clk_get may return different clock producers depending on @dev.)
+ *
+ * Drivers must assume that the clock source is not enabled.
+ *
+ * devm_clk_get should not be called from within interrupt context.
+ *
+ * The clock will automatically be freed when the device is unbound
+ * from the bus.
+ */
+struct clk *devm_clk_get(struct device *dev, const char *id);
+
+/**
* clk_prepare - prepare a clock source
* @clk: clock source
*
@@ -206,6 +226,18 @@ unsigned long clk_get_rate(struct clk *clk);
*/
void clk_put(struct clk *clk);
+/**
+ * devm_clk_put - "free" a managed clock source
+ * @dev: device used to acuqire the clock
+ * @clk: clock source acquired with devm_clk_get()
+ *
+ * Note: drivers must ensure that all clk_enable calls made on this
+ * clock source are balanced by clk_disable calls prior to calling
+ * this function.
+ *
+ * clk_put should not be called from within interrupt context.
+ */
+void devm_clk_put(struct device *dev, struct clk *clk);
/*
* The remaining APIs are optional for machine class support.
diff --git a/include/linux/clkdev.h b/include/linux/clkdev.h
index d9a4fd028c9..a6a6f603103 100644
--- a/include/linux/clkdev.h
+++ b/include/linux/clkdev.h
@@ -40,4 +40,7 @@ void clkdev_drop(struct clk_lookup *cl);
void clkdev_add_table(struct clk_lookup *, size_t);
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);
+
#endif