diff options
| -rw-r--r-- | drivers/base/regmap/regmap.c | 20 | ||||
| -rw-r--r-- | include/linux/regmap.h | 2 |
2 files changed, 22 insertions, 0 deletions
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index 7d689a15c500..285afa7470c0 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -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 * diff --git a/include/linux/regmap.h b/include/linux/regmap.h index a10380bfbeac..4c8c20a7a75d 100644 --- a/include/linux/regmap.h +++ b/include/linux/regmap.h @@ -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. |