regmap: regmap max_raw_read/write getter functions

Add functions to access the maximum size we can read/write using
regmap_raw_read/write().

This helps drivers that need to know how much they can write with the
raw functions without problems. There are some devices (e.g. bmc150)
that have fifos as registers which need to be read in specific chunks
otherwise samples are dropped.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 22 insertions, 0 deletions

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 7cbe42680877..47210101e308 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -1393,6 +1393,28 @@ bool regmap_can_raw_write(struct regmap *map)
 }
 EXPORT_SYMBOL_GPL(regmap_can_raw_write);
 
+/**
+ * regmap_get_raw_read_max - Get the maximum size we can read
+ *
+ * @map: Map to check.
+ */
+size_t regmap_get_raw_read_max(struct regmap *map)
+{
+	return map->max_raw_read;
+}
+EXPORT_SYMBOL_GPL(regmap_get_raw_read_max);
+
+/**
+ * regmap_get_raw_write_max - Get the maximum size we can read
+ *
+ * @map: Map to check.
+ */
+size_t regmap_get_raw_write_max(struct regmap *map)
+{
+	return map->max_raw_write;
+}
+EXPORT_SYMBOL_GPL(regmap_get_raw_write_max);
+
 static int _regmap_bus_formatted_write(void *context, unsigned int reg,
 				       unsigned int val)
 {