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>

1 files changed, 28 insertions, 0 deletions

diff --git a/drivers/ram/ram-uclass.c b/drivers/ram/ram-uclass.c
new file mode 100644
index 0000000000..2f1fbe7c97
--- /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",
+};