dm: Add support for RAM drivers
Add support for a driver which sets up DRAM and can return information about
the amount of RAM available. This is a first step towards moving RAM init
to driver model.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/ram/ram-uclass.c b/drivers/ram/ram-uclass.c
new file mode 100644
index 0000000..2f1fbe7
--- /dev/null
+++ b/drivers/ram/ram-uclass.c
@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2015 Google, Inc
+ * Written by Simon Glass <sjg@chromium.org>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <ram.h>
+#include <dm.h>
+#include <errno.h>
+#include <dm/lists.h>
+#include <dm/root.h>
+
+int ram_get_info(struct udevice *dev, struct ram_info *info)
+{
+ struct ram_ops *ops = ram_get_ops(dev);
+
+ if (!ops->get_info)
+ return -ENOSYS;
+
+ return ops->get_info(dev, info);
+}
+
+UCLASS_DRIVER(ram) = {
+ .id = UCLASS_RAM,
+ .name = "ram",
+};