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Subject[PATCH] regmap: assume registers are volatile iff no cache
Date
From: Stephen Warren <swarren@nvidia.com>

If a regmap has a cache, it's likely that registers are not volatile,
perhaps with exceptions. Otherwise, the cache would not be useful. Encode
this assumption into regmap_volatile()'s default return value, for the
case where a regmap doesn't specify which registers are volatile.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
---
drivers/base/regmap/regmap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 1a01553..feb37af 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -123,7 +123,7 @@ bool regmap_volatile(struct regmap *map, unsigned int reg)
if (map->volatile_table)
return regmap_check_range_table(map, reg, map->volatile_table);

- return true;
+ return (map->cache_type == REGCACHE_NONE);
}

bool regmap_precious(struct regmap *map, unsigned int reg)
--
1.7.10.4


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