lkml.org 
[lkml]   [2015]   [Sep]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 1/1] clk: add devm_of_clk_get() and devm_of_clk_get_by_name() functions
Date
From: Paul Osmialowski <pawelo@king.net.pl>

These two functions were added to ease management of clocks obtained
from OF device nodes.

Signed-off-by: Paul Osmialowski <pawelo@king.net.pl>
---
drivers/clk/clk-devres.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
include/linux/clk.h | 20 ++++++++++++++++++++
2 files changed, 66 insertions(+)

diff --git a/drivers/clk/clk-devres.c b/drivers/clk/clk-devres.c
index 8f57154..197075a 100644
--- a/drivers/clk/clk-devres.c
+++ b/drivers/clk/clk-devres.c
@@ -34,6 +34,52 @@ struct clk *devm_clk_get(struct device *dev, const char *id)
}
EXPORT_SYMBOL(devm_clk_get);

+#ifdef CONFIG_OF
+
+struct clk *devm_of_clk_get(struct device *dev, struct device_node *np,
+ int index)
+{
+ struct clk **ptr, *clk;
+
+ ptr = devres_alloc(devm_clk_release, sizeof(*ptr), GFP_KERNEL);
+ if (!ptr)
+ return ERR_PTR(-ENOMEM);
+
+ clk = of_clk_get(np, index);
+ if (!IS_ERR(clk)) {
+ *ptr = clk;
+ devres_add(dev, ptr);
+ } else {
+ devres_free(ptr);
+ }
+
+ return clk;
+}
+EXPORT_SYMBOL(devm_of_clk_get);
+
+struct clk *devm_of_clk_get_by_name(struct device *dev, struct device_node *np,
+ const char *name)
+{
+ struct clk **ptr, *clk;
+
+ ptr = devres_alloc(devm_clk_release, sizeof(*ptr), GFP_KERNEL);
+ if (!ptr)
+ return ERR_PTR(-ENOMEM);
+
+ clk = of_clk_get_by_name(np, name);
+ if (!IS_ERR(clk)) {
+ *ptr = clk;
+ devres_add(dev, ptr);
+ } else {
+ devres_free(ptr);
+ }
+
+ return clk;
+}
+EXPORT_SYMBOL(devm_of_clk_get_by_name);
+
+#endif /* CONFIG_OF */
+
static int devm_clk_match(struct device *dev, void *res, void *data)
{
struct clk **c = res;
diff --git a/include/linux/clk.h b/include/linux/clk.h
index 0df4a51..d7763f1 100644
--- a/include/linux/clk.h
+++ b/include/linux/clk.h
@@ -504,4 +504,24 @@ static inline struct clk *of_clk_get_by_name(struct device_node *np,
}
#endif

+#if defined(CONFIG_OF) && defined(CONFIG_COMMON_CLK) && defined(CONFIG_HAVE_CLK)
+struct clk *devm_of_clk_get(struct device *dev, struct device_node *np,
+ int index);
+struct clk *devm_of_clk_get_by_name(struct device *dev, struct device_node *np,
+ const char *name);
+#else
+static inline struct clk *devm_of_clk_get(struct device *dev,
+ struct device_node *np,
+ int index)
+{
+ return ERR_PTR(-ENOENT);
+}
+static inline struct clk *devm_of_clk_get_by_name(struct device *dev,
+ struct device_node *np,
+ const char *name)
+{
+ return ERR_PTR(-ENOENT);
+}
+#endif
+
#endif
--
2.4.9


\
 
 \ /
  Last update: 2015-09-24 10:41    [W:0.716 / U:0.136 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site