Merging upstream version 6.8.11.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 37 insertions, 0 deletions

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 6db77d8e45..4ae399c30f 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -2837,6 +2837,43 @@ int regmap_read(struct regmap *map, unsigned int reg, unsigned int *val)
 EXPORT_SYMBOL_GPL(regmap_read);
 
 /**
+ * regmap_read_bypassed() - Read a value from a single register direct
+ *			    from the device, bypassing the cache
+ *
+ * @map: Register map to read from
+ * @reg: Register to be read from
+ * @val: Pointer to store read value
+ *
+ * A value of zero will be returned on success, a negative errno will
+ * be returned in error cases.
+ */
+int regmap_read_bypassed(struct regmap *map, unsigned int reg, unsigned int *val)
+{
+	int ret;
+	bool bypass, cache_only;
+
+	if (!IS_ALIGNED(reg, map->reg_stride))
+		return -EINVAL;
+
+	map->lock(map->lock_arg);
+
+	bypass = map->cache_bypass;
+	cache_only = map->cache_only;
+	map->cache_bypass = true;
+	map->cache_only = false;
+
+	ret = _regmap_read(map, reg, val);
+
+	map->cache_bypass = bypass;
+	map->cache_only = cache_only;
+
+	map->unlock(map->lock_arg);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(regmap_read_bypassed);
+
+/**
  * regmap_raw_read() - Read raw data from the device
  *
  * @map: Register map to read from