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regmap: Support for caching in reg_raw_write() 

Adding support for caching of data into the
non-volatile register from the call of reg_raw_write().

This will allow the larger block of data write into multiple
register without worrying whether register is cached or not
through reg_raw_write().

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Laxman Dewangan 2012-02-10 21:30:27 +05:30 committed by Mark Brown
parent d65b4e98d7
commit c915719841
1 changed files with 21 additions and 5 deletions
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26
drivers/base/regmap/regmap.c
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@ -321,6 +321,26 @@ static int _regmap_raw_write(struct regmap *map, unsigned int reg,
if (!map->writeable_reg(map->dev, reg + i)) if (!map->writeable_reg(map->dev, reg + i))
return -EINVAL; return -EINVAL;
if (!map->cache_bypass && map->format.parse_val) {
unsigned int ival;
int val_bytes = map->format.val_bytes;
for (i = 0; i < val_len / val_bytes; i++) {
memcpy(map->work_buf, val + (i * val_bytes), val_bytes);
ival = map->format.parse_val(map->work_buf);
ret = regcache_write(map, reg + i, ival);
if (ret) {
dev_err(map->dev,
"Error in caching of register: %u ret: %d\n",
reg + i, ret);
return ret;
}
}
if (map->cache_only) {
map->cache_dirty = true;
return 0;
}
}
map->format.format_reg(map->work_buf, reg); map->format.format_reg(map->work_buf, reg);
u8[0] |= map->write_flag_mask; u8[0] |= map->write_flag_mask;
@ -366,7 +386,7 @@ int _regmap_write(struct regmap *map, unsigned int reg,
int ret; int ret;
BUG_ON(!map->format.format_write && !map->format.format_val); BUG_ON(!map->format.format_write && !map->format.format_val);
if (!map->cache_bypass) { if (!map->cache_bypass && map->format.format_write) {
ret = regcache_write(map, reg, val); ret = regcache_write(map, reg, val);
if (ret != 0) if (ret != 0)
return ret; return ret;
@ -441,12 +461,8 @@ EXPORT_SYMBOL_GPL(regmap_write);
int regmap_raw_write(struct regmap *map, unsigned int reg, int regmap_raw_write(struct regmap *map, unsigned int reg,
const void *val, size_t val_len) const void *val, size_t val_len)
{ {
size_t val_count = val_len / map->format.val_bytes;
int ret; int ret;
WARN_ON(!regmap_volatile_range(map, reg, val_count) &&
map->cache_type != REGCACHE_NONE);
mutex_lock(&map->lock); mutex_lock(&map->lock);
ret = _regmap_raw_write(map, reg, val, val_len); ret = _regmap_raw_write(map, reg, val, val_len);