When checking if a register is writable we must first check if the register is a non incrementing writable register. Non incrementing register are deep and do not move to the next register when writing, for example a FIFO.
Signed-off-by: Ben Whitten <[email protected]> --- drivers/base/regmap/regmap.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index f1025452bb39..70645a28897c 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -1489,10 +1489,11 @@ static int _regmap_raw_write_impl(struct regmap *map, unsigned int reg, WARN_ON(!map->bus); /* Check for unwritable registers before we start */ - for (i = 0; i < val_len / map->format.val_bytes; i++) - if (!regmap_writeable(map, - reg + regmap_get_offset(map, i))) - return -EINVAL; + if (!regmap_writeable_noinc(map, reg)) + for (i = 0; i < val_len / map->format.val_bytes; i++) + if (!regmap_writeable(map, + reg + regmap_get_offset(map, i))) + return -EINVAL; if (!map->cache_bypass && map->format.parse_val) { unsigned int ival; -- 2.17.1
