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regmap: add regmap_field_update_bits()

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Current regmap_field is supporting read/write functions.
This patch adds new update_bits function for it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Kuninori Morimoto 2013-09-01 20:24:50 -07:00 committed by Mark Brown
parent 272b98c645
commit fdf2002905
2 changed files with 22 additions and 0 deletions
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20
drivers/base/regmap/regmap.c
View file

@ -1369,6 +1369,26 @@ int regmap_field_write(struct regmap_field *field, unsigned int val)
}
EXPORT_SYMBOL_GPL(regmap_field_write);
/**
* regmap_field_update_bits(): Perform a read/modify/write cycle
* on the register field
*
* @field: Register field to write to
* @mask: Bitmask to change
* @val: Value to be written
*
* A value of zero will be returned on success, a negative errno will
* be returned in error cases.
*/
int regmap_field_update_bits(struct regmap_field *field, unsigned int mask, unsigned int val)
{
mask = (mask << field->shift) & field->mask;
return regmap_update_bits(field->regmap, field->reg,
mask, val << field->shift);
}
EXPORT_SYMBOL_GPL(regmap_field_update_bits);
/*
* regmap_bulk_write(): Write multiple registers to the device
*

2
include/linux/regmap.h
View file

@ -448,6 +448,8 @@ void devm_regmap_field_free(struct device *dev, struct regmap_field *field);
int regmap_field_read(struct regmap_field *field, unsigned int *val);
int regmap_field_write(struct regmap_field *field, unsigned int val);
int regmap_field_update_bits(struct regmap_field *field,
unsigned int mask, unsigned int val);
/**
* Description of an IRQ for the generic regmap irq_chip.