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Merge branch 'topic/patch' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap into regmap-drivers

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This commit is contained in:
Mark Brown 2012-02-20 21:21:33 +00:00
commit aca1e172a1
4 changed files with 78 additions and 0 deletions
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3
drivers/base/regmap/internal.h
View File

@ -75,6 +75,9 @@ struct regmap {
const void *reg_defaults_raw;
void *cache;
bool cache_dirty;
struct reg_default *patch;
int patch_regs;
};
struct regcache_ops {

14
drivers/base/regmap/regcache.c
View File

@ -268,8 +268,22 @@ int regcache_sync(struct regmap *map)
map->cache_ops->name);
name = map->cache_ops->name;
trace_regcache_sync(map->dev, name, "start");
if (!map->cache_dirty)
goto out;
/* Apply any patch first */
map->cache_bypass = 1;
for (i = 0; i < map->patch_regs; i++) {
ret = _regmap_write(map, map->patch[i].reg, map->patch[i].def);
if (ret != 0) {
dev_err(map->dev, "Failed to write %x = %x: %d\n",
map->patch[i].reg, map->patch[i].def, ret);
goto out;
}
}
map->cache_bypass = 0;
if (map->cache_ops->sync) {
ret = map->cache_ops->sync(map);
} else {

58
drivers/base/regmap/regmap.c
View File

@ -711,6 +711,64 @@ int regmap_update_bits_check(struct regmap *map, unsigned int reg,
}
EXPORT_SYMBOL_GPL(regmap_update_bits_check);
/**
* regmap_register_patch: Register and apply register updates to be applied
* on device initialistion
*
* @map: Register map to apply updates to.
* @regs: Values to update.
* @num_regs: Number of entries in regs.
*
* Register a set of register updates to be applied to the device
* whenever the device registers are synchronised with the cache and
* apply them immediately. Typically this is used to apply
* corrections to be applied to the device defaults on startup, such
* as the updates some vendors provide to undocumented registers.
*/
int regmap_register_patch(struct regmap *map, const struct reg_default *regs,
int num_regs)
{
int i, ret;
bool bypass;
/* If needed the implementation can be extended to support this */
if (map->patch)
return -EBUSY;
mutex_lock(&map->lock);
bypass = map->cache_bypass;
map->cache_bypass = true;
/* Write out first; it's useful to apply even if we fail later. */
for (i = 0; i < num_regs; i++) {
ret = _regmap_write(map, regs[i].reg, regs[i].def);
if (ret != 0) {
dev_err(map->dev, "Failed to write %x = %x: %d\n",
regs[i].reg, regs[i].def, ret);
goto out;
}
}
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;
} else {
ret = -ENOMEM;
}
out:
map->cache_bypass = bypass;
mutex_unlock(&map->lock);
return ret;
}
EXPORT_SYMBOL_GPL(regmap_register_patch);
static int __init regmap_initcall(void)
{
regmap_debugfs_initcall();

3
include/linux/regmap.h
View File

@ -157,6 +157,9 @@ void regcache_cache_only(struct regmap *map, bool enable);
void regcache_cache_bypass(struct regmap *map, bool enable);
void regcache_mark_dirty(struct regmap *map);
int regmap_register_patch(struct regmap *map, const struct reg_default *regs,
int num_regs);
/**
* Description of an IRQ for the generic regmap irq_chip.
*