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regmap: Fix regmap_bulk_write for bus writes 

The regmap config does not prohibit val_bytes that are not powers of
two. But the current code of regmap_bulk_write for use_single_rw does
limit the possible val_bytes to 1, 2 and 4.

This patch fixes the behaviour to allow bus writes with non-standard
val_bytes sizes.

Cc: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
hifive-unleashed-5.1
Markus Pargmann 2015-08-21 10:26:41 +02:00 committed by Mark Brown
parent fa3eec7791
commit c594b7f21d
1 changed files with 19 additions and 2 deletions
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21
drivers/base/regmap/regmap.c
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@ -1680,9 +1680,15 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val,
/*
* Some devices don't support bulk write, for
* them we have a series of single write operations.
* them we have a series of single write operations in the first two if
* blocks.
*
* The first if block is used for memory mapped io. It does not allow
* val_bytes of 3 for example.
* The second one is used for busses which do not have this limitation
* and can write arbitrary value lengths.
*/
if (!map->bus || map->use_single_rw) {
if (!map->bus) {
map->lock(map->lock_arg);
for (i = 0; i < val_count; i++) {
unsigned int ival;
@ -1714,6 +1720,17 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val,
}
out:
map->unlock(map->lock_arg);
} else if (map->use_single_rw) {
map->lock(map->lock_arg);
for (i = 0; i < val_count; i++) {
ret = _regmap_raw_write(map,
reg + (i * map->reg_stride),
val + (i * val_bytes),
val_bytes);
if (ret)
break;
}
map->unlock(map->lock_arg);
} else {
void *wval;