Commit bfad9781 authored by Bartosz Golaszewski's avatar Bartosz Golaszewski Committed by David S. Miller
Browse files

regmap: provide helpers for simple bit operations 



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: default avatarBartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent bda6752f

drivers/base/regmap/regmap.c

+22 −0
Original line number Diff line number Diff line
@@ -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;

include/linux/regmap.h

+36 −0
Original line number Diff line number Diff line
@@ -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)

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