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@xxxxxxxxxxxxxx>
---
On 12/16, Mark Brown wrote:
> On Fri, Dec 13, 2013 at 01:37:07PM -0800, Stephen Boyd wrote:
>
> > I came up with this (possibly ugly) patch. It works for my
> > specific case but I'm not sure if unpacking the val bits into an
> > unsigned int and passing that to _regmap_write() is sane. What do
> > you think?
>
> It's not lovely but it's about as good as it gets. I'd probaly just
> drop the raw single write case so it's simpler - just either raw write
> the lot or write a register at a time with unpacking (and so refactor
> the the loop that does the in place formatting into the raw case only
> and not bother for the single write).
Ok how about this?
drivers/base/regmap/regmap.c | 43 ++++++++++++++++++-------------------------
1 file changed, 18 insertions(+), 25 deletions(-)
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 1ccd61b..12b80f6 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -1514,21 +1514,30 @@ 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;
+ ival = *(unsigned int *)(val + (i * val_bytes));
+ 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 +1546,11 @@ 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)
- return ret;
- }
- } 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;
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
hosted by The Linux Foundation
--
To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
