Signed-off-by: Maarten ter Huurne <maar...@treewalker.org>
---
drivers/base/regmap/regcache-flat.c | 32 ++++++++++++++++++++++++++++++++
1 file changed, 32 insertions(+)
diff --git a/drivers/base/regmap/regcache-flat.c
b/drivers/base/regmap/regcache-flat.c
index d9762e4..1f18bec 100644
--- a/drivers/base/regmap/regcache-flat.c
+++ b/drivers/base/regmap/regcache-flat.c
@@ -62,6 +62,37 @@ static int regcache_flat_write(struct regmap *map, unsigned
int reg,
return 0;
}
+static int regcache_flat_sync(struct regmap *map, unsigned int min,
+ unsigned int max)
+{
+ unsigned int *cache = map->cache;
+ unsigned int reg;
+
+ for (reg = min; reg <= max; reg++) {
+ unsigned int val;
+ int ret;
+
+ if (regmap_volatile(map, reg))
+ continue;
+
+ val = cache[reg];
+
+ /* Is this the hardware default? If so skip. */
+ ret = regcache_lookup_reg(map, reg);
+ if (ret >= 0 && val == map->reg_defaults[ret].def)
+ continue;
+
+ map->cache_bypass = 1;
+ ret = _regmap_write(map, reg, val);
+ map->cache_bypass = 0;
+ if (ret)
+ return ret;
+ dev_dbg(map->dev, "Synced register %#x, value %#x\n", reg, val);
+ }
+
+ return 0;
+}
+
struct regcache_ops regcache_flat_ops = {
.type = REGCACHE_FLAT,
.name = "flat",
@@ -69,4 +100,5 @@ struct regcache_ops regcache_flat_ops = {
.exit = regcache_flat_exit,
.read = regcache_flat_read,
.write = regcache_flat_write,
+ .sync = regcache_flat_sync,
};
--
1.7.10.4
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