From 8d9cbb00643f26654656e737f52dc3ab645dc348 Mon Sep 17 00:00:00 2001
From: Mark Brown <broonie@opensource.wolfsonmicro.com>
Date: Thu, 23 Feb 2012 20:11:58 +0000
Subject: [PATCH] --- yaml --- r: 294149 b: refs/heads/master c:
 a3c3774176838bbfa4f6e48133644903818e56dc h: refs/heads/master i:   294147:
 f0c51dab10459f417e651b9e87a65a6d764e067b v: v3

---
 [refs]                                   | 2 +-
 trunk/drivers/base/regmap/regcache-lzo.c | 6 ++++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 1bede80ec189..9d654413fb88 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: f0c2319f9f196726ebe4d7508fd8fbd804988db3
+refs/heads/master: a3c3774176838bbfa4f6e48133644903818e56dc
diff --git a/trunk/drivers/base/regmap/regcache-lzo.c b/trunk/drivers/base/regmap/regcache-lzo.c
index b7d16143edeb..3025cf920f25 100644
--- a/trunk/drivers/base/regmap/regcache-lzo.c
+++ b/trunk/drivers/base/regmap/regcache-lzo.c
@@ -343,6 +343,12 @@ static int regcache_lzo_sync(struct regmap *map)
 		ret = regcache_read(map, i, &val);
 		if (ret)
 			return ret;
+
+		/* Is this the hardware default?  If so skip. */
+		ret = regcache_lookup_reg(map, i);
+		if (ret > 0 && val == map->reg_defaults[ret].def)
+			continue;
+
 		map->cache_bypass = 1;
 		ret = _regmap_write(map, i, val);
 		map->cache_bypass = 0;