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regmap: Allow regmap_bulk_write() to work for "no-bus" regmaps 

regmap_bulk_write() should decay to performing individual writes
if we're using a "no-bus" regmap. Unfortunately, it returns an
error because there is no map->bus pointer. Fix it.

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Stephen Boyd 2013-12-26 13:52:04 -08:00 committed by Mark Brown
parent 34f6533450
commit f4298360a5
1 changed files with 37 additions and 25 deletions
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62
drivers/base/regmap/regmap.c
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@ -1514,21 +1514,49 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val,
{
int ret = 0, i;
size_t val_bytes = map->format.val_bytes;
void *wval;
if (!map->bus)
return -EINVAL;
if (!map->format.parse_inplace)
if (map->bus && !map->format.parse_inplace)
return -EINVAL;
if (reg % map->reg_stride)
return -EINVAL;
map->lock(map->lock_arg);
/*
* Some devices don't support bulk write, for
* them we have a series of single write operations.
*/
if (!map->bus || map->use_single_rw) {
for (i = 0; i < val_count; i++) {
unsigned int ival;
/* No formatting is require if val_byte is 1 */
if (val_bytes == 1) {
wval = (void *)val;
switch (val_bytes) {
case 1:
ival = *(u8 *)(val + (i * val_bytes));
break;
case 2:
ival = *(u16 *)(val + (i * val_bytes));
break;
case 4:
ival = *(u32 *)(val + (i * val_bytes));
break;
#ifdef CONFIG_64BIT
case 8:
ival = *(u64 *)(val + (i * val_bytes));
break;
#endif
default:
ret = -EINVAL;
goto out;
}
ret = _regmap_write(map, reg + (i * map->reg_stride),
ival);
if (ret != 0)
goto out;
}
} else {
void *wval;
wval = kmemdup(val, val_count * val_bytes, GFP_KERNEL);
if (!wval) {
ret = -ENOMEM;
@ -1537,27 +1565,11 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val,
}
for (i = 0; i < val_count * val_bytes; i += val_bytes)
map->format.parse_inplace(wval + i);
}
/*
* Some devices does not support bulk write, for
* them we have a series of single write operations.
*/
if (map->use_single_rw) {
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 != 0)
goto out;
}
} else {
ret = _regmap_raw_write(map, reg, wval, val_bytes * val_count);
}
if (val_bytes != 1)
kfree(wval);
}
out:
map->unlock(map->lock_arg);
return ret;