Merge branch 'clk' of http://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/linux-2.6-arm

* 'clk' of http://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/linux-2.6-arm:
  ARM: 7131/1: clkdev: Add Common Macro for clk_lookup
  clk: spi-pl022: convert to clk_prepare()/clk_unprepare()
  clk: timer-sp: convert to clk_prepare()/clk_unprepare()
  clk: sa1111: convert to clk_prepare()/clk_unprepare()
  clk: mmci: convert to clk_prepare()/clk_unprepare()
  clk: amba-pl011: convert to clk_prepare()/clk_unprepare()
  clk: amba-pl010: convert to clk_prepare()/clk_unprepare()
  clk: amba-clcd: convert to clk_prepare()/clk_unprepare()
  clk: amba bus: convert to clk_prepare()/clk_unprepare()
  clk: provide prepare/unprepare functions

2 files changed, 50 insertions, 0 deletions

diff --git a/include/linux/clk.h b/include/linux/clk.h
index 1d37f42ac294..7213b52b2c0e 100644
--- a/include/linux/clk.h
+++ b/include/linux/clk.h
@@ -11,6 +11,8 @@
 #ifndef __LINUX_CLK_H
 #define __LINUX_CLK_H
 
+#include <linux/kernel.h>
+
 struct device;
 
 /*
@@ -41,11 +43,31 @@ struct clk;
 struct clk *clk_get(struct device *dev, const char *id);
 
 /**
+ * clk_prepare - prepare a clock source
+ * @clk: clock source
+ *
+ * This prepares the clock source for use.
+ *
+ * Must not be called from within atomic context.
+ */
+#ifdef CONFIG_HAVE_CLK_PREPARE
+int clk_prepare(struct clk *clk);
+#else
+static inline int clk_prepare(struct clk *clk)
+{
+	might_sleep();
+	return 0;
+}
+#endif
+
+/**
  * clk_enable - inform the system when the clock source should be running.
  * @clk: clock source
  *
  * If the clock can not be enabled/disabled, this should return success.
  *
+ * May be called from atomic contexts.
+ *
  * Returns success (0) or negative errno.
  */
 int clk_enable(struct clk *clk);
@@ -57,6 +79,8 @@ int clk_enable(struct clk *clk);
  * Inform the system that a clock source is no longer required by
  * a driver and may be shut down.
  *
+ * May be called from atomic contexts.
+ *
  * Implementation detail: if the clock source is shared between
  * multiple drivers, clk_enable() calls must be balanced by the
  * same number of clk_disable() calls for the clock source to be
@@ -64,6 +88,25 @@ int clk_enable(struct clk *clk);
  */
 void clk_disable(struct clk *clk);
 
+
+/**
+ * clk_unprepare - undo preparation of a clock source
+ * @clk: clock source
+ *
+ * This undoes a previously prepared clock.  The caller must balance
+ * the number of prepare and unprepare calls.
+ *
+ * Must not be called from within atomic context.
+ */
+#ifdef CONFIG_HAVE_CLK_PREPARE
+void clk_unprepare(struct clk *clk);
+#else
+static inline void clk_unprepare(struct clk *clk)
+{
+	might_sleep();
+}
+#endif
+
 /**
  * clk_get_rate - obtain the current clock rate (in Hz) for a clock source.
  *		  This is only valid once the clock source has been enabled.
diff --git a/include/linux/clkdev.h b/include/linux/clkdev.h
index 457bcb0a310a..d9a4fd028c9d 100644
--- a/include/linux/clkdev.h
+++ b/include/linux/clkdev.h
@@ -24,6 +24,13 @@ struct clk_lookup {
 	struct clk		*clk;
 };
 
+#define CLKDEV_INIT(d, n, c)	\
+	{			\
+		.dev_id = d,	\
+		.con_id = n,	\
+		.clk = c,	\
+	}
+
 struct clk_lookup *clkdev_alloc(struct clk *clk, const char *con_id,
 	const char *dev_fmt, ...);