summaryrefslogtreecommitdiff
path: root/drivers/core/read_extra.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/core/read_extra.c')
-rw-r--r--drivers/core/read_extra.c37
1 files changed, 37 insertions, 0 deletions
diff --git a/drivers/core/read_extra.c b/drivers/core/read_extra.c
new file mode 100644
index 0000000000..a6d2f342d9
--- /dev/null
+++ b/drivers/core/read_extra.c
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2017 Google, Inc
+ * Written by Simon Glass <sjg@chromium.org>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <dm/of_addr.h>
+#include <dm/read.h>
+#include <linux/ioport.h>
+
+int dev_read_resource(struct udevice *dev, uint index, struct resource *res)
+{
+ ofnode node = dev_ofnode(dev);
+
+#ifdef CONFIG_OF_LIVE
+ if (ofnode_is_np(node)) {
+ return of_address_to_resource(ofnode_to_np(node), index, res);
+ } else
+#endif
+ {
+ struct fdt_resource fres;
+ int ret;
+
+ ret = fdt_get_resource(gd->fdt_blob, ofnode_to_offset(node),
+ "reg", index, &fres);
+ if (ret < 0)
+ return -EINVAL;
+ memset(res, '\0', sizeof(*res));
+ res->start = fres.start;
+ res->end = fres.end;
+
+ return 0;
+ }
+}