Merge branch 'clkdev' into fixes

1 files changed, 55 insertions, 0 deletions

diff --git a/drivers/clk/clk-devres.c b/drivers/clk/clk-devres.c
new file mode 100644
index 000000000000..8f571548870f
--- /dev/null
+++ b/drivers/clk/clk-devres.c
@@ -0,0 +1,55 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/export.h>
+#include <linux/gfp.h>
+
+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_release(dev, devm_clk_release, devm_clk_match, clk);
+
+        WARN_ON(ret);
+}
+EXPORT_SYMBOL(devm_clk_put);