ARM: 7376/1: clkdev: Implement managed clk_get()
[linux-2.6.git] / drivers / clk / clkdev.c
index 6db161f..a9a1137 100644 (file)
@@ -89,6 +89,51 @@ void clk_put(struct clk *clk)
 }
 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);