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authorRussell King <rmk+kernel@arm.linux.org.uk>2015-03-02 18:40:29 +0300
committerRussell King <rmk+kernel@arm.linux.org.uk>2015-05-06 13:58:57 +0300
commit2568999835d7797afce3dcc3a3f368051ffcaf1f (patch)
tree4725e0fc6be5cd78324f36f5af0df8c3bc511c3e /drivers
parentb3d8d7e89fab374d731dfb46fe048f09766ca9c8 (diff)
downloadlinux-2568999835d7797afce3dcc3a3f368051ffcaf1f.tar.xz
clkdev: add clkdev_create() helper
Add a helper to allocate and add a clk_lookup structure. This can not only be used in several places in clkdev.c to simplify the code, but more importantly, can be used by callers of the clkdev code to simplify their clkdev creation and registration. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/clk/clkdev.c53
1 files changed, 41 insertions, 12 deletions
diff --git a/drivers/clk/clkdev.c b/drivers/clk/clkdev.c
index e112e13af760..c0eaf0973bd2 100644
--- a/drivers/clk/clkdev.c
+++ b/drivers/clk/clkdev.c
@@ -274,6 +274,19 @@ vclkdev_alloc(struct clk_hw *hw, const char *con_id, const char *dev_fmt,
return &cla->cl;
}
+static struct clk_lookup *
+vclkdev_create(struct clk_hw *hw, const char *con_id, const char *dev_fmt,
+ va_list ap)
+{
+ struct clk_lookup *cl;
+
+ cl = vclkdev_alloc(hw, con_id, dev_fmt, ap);
+ if (cl)
+ __clkdev_add(cl);
+
+ return cl;
+}
+
struct clk_lookup * __init_refok
clkdev_alloc(struct clk *clk, const char *con_id, const char *dev_fmt, ...)
{
@@ -288,6 +301,29 @@ clkdev_alloc(struct clk *clk, const char *con_id, const char *dev_fmt, ...)
}
EXPORT_SYMBOL(clkdev_alloc);
+/**
+ * clkdev_create - allocate and add a clkdev lookup structure
+ * @clk: struct clk to associate with all clk_lookups
+ * @con_id: connection ID string on device
+ * @dev_fmt: format string describing device name
+ *
+ * Returns a clk_lookup structure, which can be later unregistered and
+ * freed.
+ */
+struct clk_lookup *clkdev_create(struct clk *clk, const char *con_id,
+ const char *dev_fmt, ...)
+{
+ struct clk_lookup *cl;
+ va_list ap;
+
+ va_start(ap, dev_fmt);
+ cl = vclkdev_create(__clk_get_hw(clk), con_id, dev_fmt, ap);
+ va_end(ap);
+
+ return cl;
+}
+EXPORT_SYMBOL_GPL(clkdev_create);
+
int clk_add_alias(const char *alias, const char *alias_dev_name,
const char *con_id, struct device *dev)
{
@@ -297,12 +333,10 @@ int clk_add_alias(const char *alias, const char *alias_dev_name,
if (IS_ERR(r))
return PTR_ERR(r);
- l = clkdev_alloc(r, alias, alias_dev_name);
+ l = clkdev_create(r, alias, "%s", alias_dev_name);
clk_put(r);
- if (!l)
- return -ENODEV;
- clkdev_add(l);
- return 0;
+
+ return l ? 0 : -ENODEV;
}
EXPORT_SYMBOL(clk_add_alias);
@@ -342,15 +376,10 @@ int clk_register_clkdev(struct clk *clk, const char *con_id,
return PTR_ERR(clk);
va_start(ap, dev_fmt);
- cl = vclkdev_alloc(__clk_get_hw(clk), con_id, dev_fmt, ap);
+ cl = vclkdev_create(__clk_get_hw(clk), con_id, dev_fmt, ap);
va_end(ap);
- if (!cl)
- return -ENOMEM;
-
- clkdev_add(cl);
-
- return 0;
+ return cl ? 0 : -ENOMEM;
}
EXPORT_SYMBOL(clk_register_clkdev);