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regmap: add force_write option on _regmap_update_bits()

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Sometimes we want to write data even though it doesn't change value.
Then, force_write option on _regmap_update_bits() helps this purpose.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Kuninori Morimoto 2015-06-16 08:52:22 +00:00 committed by Mark Brown
parent d770e558e2
commit 7ff0589c7b
1 changed files with 8 additions and 8 deletions
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16
drivers/base/regmap/regmap.c
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@ -34,7 +34,7 @@
static int _regmap_update_bits(struct regmap *map, unsigned int reg,
unsigned int mask, unsigned int val,
bool *change);
bool *change, bool force_write);
static int _regmap_bus_reg_read(void *context, unsigned int reg,
unsigned int *val);
@ -1178,7 +1178,7 @@ static int _regmap_select_page(struct regmap *map, unsigned int *reg,
ret = _regmap_update_bits(map, range->selector_reg,
range->selector_mask,
win_page << range->selector_shift,
&page_chg);
&page_chg, false);
map->work_buf = orig_work_buf;
@ -2327,7 +2327,7 @@ EXPORT_SYMBOL_GPL(regmap_bulk_read);
static int _regmap_update_bits(struct regmap *map, unsigned int reg,
unsigned int mask, unsigned int val,
bool *change)
bool *change, bool force_write)
{
int ret;
unsigned int tmp, orig;
@ -2339,7 +2339,7 @@ static int _regmap_update_bits(struct regmap *map, unsigned int reg,
tmp = orig & ~mask;
tmp |= val & mask;
if (tmp != orig) {
if (force_write || (tmp != orig)) {
ret = _regmap_write(map, reg, tmp);
if (change)
*change = true;
@ -2367,7 +2367,7 @@ int regmap_update_bits(struct regmap *map, unsigned int reg,
int ret;
map->lock(map->lock_arg);
ret = _regmap_update_bits(map, reg, mask, val, NULL);
ret = _regmap_update_bits(map, reg, mask, val, NULL, false);
map->unlock(map->lock_arg);
return ret;
@ -2398,7 +2398,7 @@ int regmap_update_bits_async(struct regmap *map, unsigned int reg,
map->async = true;
ret = _regmap_update_bits(map, reg, mask, val, NULL);
ret = _regmap_update_bits(map, reg, mask, val, NULL, false);
map->async = false;
@ -2427,7 +2427,7 @@ int regmap_update_bits_check(struct regmap *map, unsigned int reg,
int ret;
map->lock(map->lock_arg);
ret = _regmap_update_bits(map, reg, mask, val, change);
ret = _regmap_update_bits(map, reg, mask, val, change, false);
map->unlock(map->lock_arg);
return ret;
}
@ -2460,7 +2460,7 @@ int regmap_update_bits_check_async(struct regmap *map, unsigned int reg,
map->async = true;
ret = _regmap_update_bits(map, reg, mask, val, change);
ret = _regmap_update_bits(map, reg, mask, val, change, false);
map->async = false;