ARM: 7376/1: clkdev: Implement managed clk_get()
Allow clk API users to simplify their cleanup paths by providing a
managed version of clk_get() and clk_put().
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/drivers/clk/clkdev.c b/drivers/clk/clkdev.c
index 6db161f..a9a1137 100644
--- a/drivers/clk/clkdev.c
+++ b/drivers/clk/clkdev.c
@@ -89,6 +89,51 @@
}
EXPORT_SYMBOL(clk_put);
+static void devm_clk_release(struct device *dev, void *res)
+{
+ clk_put(*(struct clk **)res);
+}
+
+struct clk *devm_clk_get(struct device *dev, const char *id)
+{
+ struct clk **ptr, *clk;
+
+ ptr = devres_alloc(devm_clk_release, sizeof(*ptr), GFP_KERNEL);
+ if (!ptr)
+ return ERR_PTR(-ENOMEM);
+
+ clk = clk_get(dev, id);
+ if (!IS_ERR(clk)) {
+ *ptr = clk;
+ devres_add(dev, ptr);
+ } else {
+ devres_free(ptr);
+ }
+
+ return clk;
+}
+EXPORT_SYMBOL(devm_clk_get);
+
+static int devm_clk_match(struct device *dev, void *res, void *data)
+{
+ struct clk **c = res;
+ if (!c || !*c) {
+ WARN_ON(!c || !*c);
+ return 0;
+ }
+ return *c == data;
+}
+
+void devm_clk_put(struct device *dev, struct clk *clk)
+{
+ int ret;
+
+ ret = devres_destroy(dev, devm_clk_release, devm_clk_match, clk);
+
+ WARN_ON(ret);
+}
+EXPORT_SYMBOL(devm_clk_put);
+
void clkdev_add(struct clk_lookup *cl)
{
mutex_lock(&clocks_mutex);