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authorSascha Hauer <s.hauer@pengutronix.de>2009-03-07 12:55:49 +0100
committerSascha Hauer <s.hauer@pengutronix.de>2009-03-27 14:51:13 +0100
commit05fd8e73e1357feaea9c48938d937eae76b4aef4 (patch)
tree77aa0cfcfbd892423dcba295610116ca053029e2
parent0412d6c9271811b84568fcea3237e2193e21866a (diff)
downloadop-kernel-dev-05fd8e73e1357feaea9c48938d937eae76b4aef4.zip
op-kernel-dev-05fd8e73e1357feaea9c48938d937eae76b4aef4.tar.gz
clkdev: add possibility to get a clock based on the device name
This adds clk_get_sys to get a clock without the associated struct device. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
-rw-r--r--arch/arm/common/clkdev.c11
-rw-r--r--include/linux/clk.h17
2 files changed, 26 insertions, 2 deletions
diff --git a/arch/arm/common/clkdev.c b/arch/arm/common/clkdev.c
index 1037bba..5589444 100644
--- a/arch/arm/common/clkdev.c
+++ b/arch/arm/common/clkdev.c
@@ -62,9 +62,8 @@ static struct clk *clk_find(const char *dev_id, const char *con_id)
return clk;
}
-struct clk *clk_get(struct device *dev, const char *con_id)
+struct clk *clk_get_sys(const char *dev_id, const char *con_id)
{
- const char *dev_id = dev ? dev_name(dev) : NULL;
struct clk *clk;
mutex_lock(&clocks_mutex);
@@ -75,6 +74,14 @@ struct clk *clk_get(struct device *dev, const char *con_id)
return clk ? clk : ERR_PTR(-ENOENT);
}
+EXPORT_SYMBOL(clk_get_sys);
+
+struct clk *clk_get(struct device *dev, const char *con_id)
+{
+ const char *dev_id = dev ? dev_name(dev) : NULL;
+
+ return clk_get_sys(dev_id, con_id);
+}
EXPORT_SYMBOL(clk_get);
void clk_put(struct clk *clk)
diff --git a/include/linux/clk.h b/include/linux/clk.h
index 7787773..1db9bbf 100644
--- a/include/linux/clk.h
+++ b/include/linux/clk.h
@@ -125,4 +125,21 @@ int clk_set_parent(struct clk *clk, struct clk *parent);
*/
struct clk *clk_get_parent(struct clk *clk);
+/**
+ * clk_get_sys - get a clock based upon the device name
+ * @dev_id: device name
+ * @con_id: connection ID
+ *
+ * Returns a struct clk corresponding to the clock producer, or
+ * valid IS_ERR() condition containing errno. The implementation
+ * uses @dev_id and @con_id to determine the clock consumer, and
+ * thereby the clock producer. In contrast to clk_get() this function
+ * takes the device name instead of the device itself for identification.
+ *
+ * Drivers must assume that the clock source is not enabled.
+ *
+ * clk_get_sys should not be called from within interrupt context.
+ */
+struct clk *clk_get_sys(const char *dev_id, const char *con_id);
+
#endif
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