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regmap: provide helpers for simple bit operations

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In many instances regmap_update_bits() is used for simple bit setting
and clearing. In these cases the last argument is redundant and we can
hide it with a static inline function.

This adds three new helpers for simple bit operations: set_bits,
clear_bits and test_bits (the last one defined as a regular function).

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Bartosz Golaszewski 2020-05-28 17:45:02 +02:00 committed by David S. Miller
parent bda6752f3d
commit bfad978116
2 changed files with 58 additions and 0 deletions
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22
drivers/base/regmap/regmap.c
View File

@ -2936,6 +2936,28 @@ int regmap_update_bits_base(struct regmap *map, unsigned int reg,
}
EXPORT_SYMBOL_GPL(regmap_update_bits_base);
/**
* regmap_test_bits() - Check if all specified bits are set in a register.
*
* @map: Register map to operate on
* @reg: Register to read from
* @bits: Bits to test
*
* Returns -1 if the underlying regmap_read() fails, 0 if at least one of the
* tested bits is not set and 1 if all tested bits are set.
*/
int regmap_test_bits(struct regmap *map, unsigned int reg, unsigned int bits)
{
unsigned int val, ret;
ret = regmap_read(map, reg, &val);
if (ret)
return ret;
return (val & bits) == bits;
}
EXPORT_SYMBOL_GPL(regmap_test_bits);
void regmap_async_complete_cb(struct regmap_async *async, int ret)
{
struct regmap *map = async->map;

36
include/linux/regmap.h
View File

@ -1111,6 +1111,21 @@ bool regmap_reg_in_ranges(unsigned int reg,
const struct regmap_range *ranges,
unsigned int nranges);
static inline int regmap_set_bits(struct regmap *map,
unsigned int reg, unsigned int bits)
{
return regmap_update_bits_base(map, reg, bits, bits,
NULL, false, false);
}
static inline int regmap_clear_bits(struct regmap *map,
unsigned int reg, unsigned int bits)
{
return regmap_update_bits_base(map, reg, bits, 0, NULL, false, false);
}
int regmap_test_bits(struct regmap *map, unsigned int reg, unsigned int bits);
/**
* struct reg_field - Description of an register field
*
@ -1410,6 +1425,27 @@ static inline int regmap_update_bits_base(struct regmap *map, unsigned int reg,
return -EINVAL;
}
static inline int regmap_set_bits(struct regmap *map,
unsigned int reg, unsigned int bits)
{
WARN_ONCE(1, "regmap API is disabled");
return -EINVAL;
}
static inline int regmap_clear_bits(struct regmap *map,
unsigned int reg, unsigned int bits)
{
WARN_ONCE(1, "regmap API is disabled");
return -EINVAL;
}
static inline int regmap_test_bits(struct regmap *map,
unsigned int reg, unsigned int bits)
{
WARN_ONCE(1, "regmap API is disabled");
return -EINVAL;
}
static inline int regmap_field_update_bits_base(struct regmap_field *field,
unsigned int mask, unsigned int val,
bool *change, bool async, bool force)