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regmap: Force write support

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This allows users to use _update_bits() without the write suppression,
 useful for some hardware.
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Merge tag 'regmap-force' into asoc-rcar

regmap: Force write support

This allows users to use _update_bits() without the write suppression,
useful for some hardware.
This commit is contained in:
Mark Brown 2015-07-10 11:39:23 +01:00
commit d1b080290f
2 changed files with 54 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

51
drivers/base/regmap/regmap.c
View File

@ -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;
@ -1624,6 +1624,18 @@ int regmap_fields_write(struct regmap_field *field, unsigned int id,
}
EXPORT_SYMBOL_GPL(regmap_fields_write);
int regmap_fields_force_write(struct regmap_field *field, unsigned int id,
unsigned int val)
{
if (id >= field->id_size)
return -EINVAL;
return regmap_write_bits(field->regmap,
field->reg + (field->id_offset * id),
field->mask, val << field->shift);
}
EXPORT_SYMBOL_GPL(regmap_fields_force_write);
/**
* regmap_fields_update_bits(): Perform a read/modify/write cycle
* on the register field
@ -2327,7 +2339,7 @@ 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 +2351,7 @@ 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;
@ -2367,13 +2379,36 @@ 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;
}
EXPORT_SYMBOL_GPL(regmap_update_bits);
/**
* regmap_write_bits: Perform a read/modify/write cycle on the register map
*
* @map: Register map to update
* @reg: Register to update
* @mask: Bitmask to change
* @val: New value for bitmask
*
* Returns zero for success, a negative number on error.
*/
int regmap_write_bits(struct regmap *map, unsigned int reg,
unsigned int mask, unsigned int val)
{
int ret;
map->lock(map->lock_arg);
ret = _regmap_update_bits(map, reg, mask, val, NULL, true);
map->unlock(map->lock_arg);
return ret;
}
EXPORT_SYMBOL_GPL(regmap_write_bits);
/**
* regmap_update_bits_async: Perform a read/modify/write cycle on the register
* map asynchronously
@ -2398,7 +2433,7 @@ 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 +2462,7 @@ 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 +2495,7 @@ 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;

11
include/linux/regmap.h
View File

@ -424,6 +424,8 @@ int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val,
size_t val_count);
int regmap_update_bits(struct regmap *map, unsigned int reg,
unsigned int mask, unsigned int val);
int regmap_write_bits(struct regmap *map, unsigned int reg,
unsigned int mask, unsigned int val);
int regmap_update_bits_async(struct regmap *map, unsigned int reg,
unsigned int mask, unsigned int val);
int regmap_update_bits_check(struct regmap *map, unsigned int reg,
@ -503,6 +505,8 @@ int regmap_field_update_bits(struct regmap_field *field,
int regmap_fields_write(struct regmap_field *field, unsigned int id,
unsigned int val);
int regmap_fields_force_write(struct regmap_field *field, unsigned int id,
unsigned int val);
int regmap_fields_read(struct regmap_field *field, unsigned int id,
unsigned int *val);
int regmap_fields_update_bits(struct regmap_field *field, unsigned int id,
@ -645,6 +649,13 @@ static inline int regmap_update_bits(struct regmap *map, unsigned int reg,
return -EINVAL;
}
static inline int regmap_write_bits(struct regmap *map, unsigned int reg,
unsigned int mask, unsigned int val)
{
WARN_ONCE(1, "regmap API is disabled");
return -EINVAL;
}
static inline int regmap_update_bits_async(struct regmap *map,
unsigned int reg,
unsigned int mask, unsigned int val)