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authorDimitris Papastamos <dp@opensource.wolfsonmicro.com>2011-09-29 14:36:27 +0100
committerMark Brown <broonie@opensource.wolfsonmicro.com>2011-09-30 13:57:47 +0100
commit6eb0f5e0154facfe4f0acdb9f474cde773319efc (patch)
treeef902b2751362a7ecd607a992bd4426a110d308b /drivers/base/regmap
parentbeb1a10f219ce720c13168203bd5ebe4ce7879e0 (diff)
regmap: Implement regcache_cache_bypass helper function
Ensure we've got a function so users can enable/disable the cache bypass option. Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/base/regmap')
-rw-r--r--drivers/base/regmap/regcache.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index 5dbc5076267..876622453cd 100644
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -286,6 +286,25 @@ void regcache_cache_only(struct regmap *map, bool enable)
}
EXPORT_SYMBOL_GPL(regcache_cache_only);
+/**
+ * regcache_cache_bypass: Put a register map into cache bypass mode
+ *
+ * @map: map to configure
+ * @cache_only: flag if changes should not be written to the hardware
+ *
+ * When a register map is marked with the cache bypass option, writes
+ * to the register map API will only update the hardware and not the
+ * the cache directly. This is useful when syncing the cache back to
+ * the hardware.
+ */
+void regcache_cache_bypass(struct regmap *map, bool enable)
+{
+ mutex_lock(&map->lock);
+ map->cache_bypass = enable;
+ mutex_unlock(&map->lock);
+}
+EXPORT_SYMBOL_GPL(regcache_cache_bypass);
+
bool regcache_set_val(void *base, unsigned int idx,
unsigned int val, unsigned int word_size)
{