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regmap: Allow multiple patches to be registered

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It may be useful to register multiple patches with regmap, for example
one that depends on the device revision and one that depends on the system
configuration. Add support for doing this, appending any new patches to
the existing patches.

Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Mark Brown
2013-07-11 12:41:44 +01:00
parent ad81f0545e
commit aab13ebca2
1 changed files with 8 additions and 9 deletions
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17
drivers/base/regmap/regmap.c
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@@ -1888,13 +1888,10 @@ EXPORT_SYMBOL_GPL(regmap_async_complete);
int regmap_register_patch(struct regmap *map, const struct reg_default *regs,
int num_regs)
{
struct reg_default *p;
int i, ret;
bool bypass;
/* If needed the implementation can be extended to support this */
if (map->patch)
return -EBUSY;
map->lock(map->lock_arg);
bypass = map->cache_bypass;
@@ -1911,11 +1908,13 @@ int regmap_register_patch(struct regmap *map, const struct reg_default *regs,
}
}
map->patch = kcalloc(num_regs, sizeof(struct reg_default), GFP_KERNEL);
if (map->patch != NULL) {
memcpy(map->patch, regs,
num_regs * sizeof(struct reg_default));
map->patch_regs = num_regs;
p = krealloc(map->patch,
sizeof(struct reg_default) * (map->patch_regs + num_regs),
GFP_KERNEL);
if (p) {
memcpy(p + map->patch_regs, regs, num_regs * sizeof(*regs));
map->patch = p;
map->patch_regs += num_regs;
} else {
ret = -ENOMEM;
}