From 2448f607dc904a385148ea506df6bd037f8a248b Mon Sep 17 00:00:00 2001
From: Mario Six <mario.six@gdsys.cc>
Date: Mon, 15 Oct 2018 09:24:08 +0200
Subject: [PATCH] regmap: Add error output

Add some debug output in cases where the initialization of a regmap
fails.

Reviewed-by: Anatolij Gustschin <agust@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Mario Six <mario.six@gdsys.cc>
---
 drivers/core/regmap.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/core/regmap.c b/drivers/core/regmap.c
index 25c1ae5d7d..154426269d 100644
--- a/drivers/core/regmap.c
+++ b/drivers/core/regmap.c
@@ -139,12 +139,18 @@ int regmap_init_mem(ofnode node, struct regmap **mapp)
 	}
 
 	len = ofnode_read_size(node, "reg");
-	if (len < 0)
+	if (len < 0) {
+		debug("%s: Error while reading reg size (ret = %d)\n",
+		      ofnode_get_name(node), len);
 		return len;
+	}
 	len /= sizeof(fdt32_t);
 	count = len / both_len;
-	if (!count)
+	if (!count) {
+		debug("%s: Not enough data in reg property\n",
+		      ofnode_get_name(node));
 		return -EINVAL;
+	}
 
 	map = regmap_alloc(count);
 	if (!map)
-- 
2.39.5