dm: core: Add ofnode_read_resource()
We sometimes need to read a resource from an arbitrary node. In any case
for consistency we should not put the live-tree switching code in
a dev_read_...() function. Update this to suit.
Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Tested-on: Beaver, Jetson-TK1
Tested-by: Stephen Warren <swarren@nvidia.com>
diff --git a/drivers/core/ofnode.c b/drivers/core/ofnode.c
index fd068b0..e4b2a85 100644
--- a/drivers/core/ofnode.c
+++ b/drivers/core/ofnode.c
@@ -14,6 +14,7 @@
#include <dm/of_addr.h>
#include <dm/ofnode.h>
#include <linux/err.h>
+#include <linux/ioport.h>
int ofnode_read_u32(ofnode node, const char *propname, u32 *outp)
{
@@ -593,3 +594,23 @@
return false;
}
+
+int ofnode_read_resource(ofnode node, uint index, struct resource *res)
+{
+ if (ofnode_is_np(node)) {
+ return of_address_to_resource(ofnode_to_np(node), index, res);
+ } else {
+ 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;
+ }
+}