diff options
Diffstat (limited to 'drivers/base/regmap/regmap.c')
-rw-r--r-- | drivers/base/regmap/regmap.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index d0ce2fef..c7111d0 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -813,6 +813,8 @@ static void regmap_field_init(struct regmap_field *rm_field, rm_field->reg = reg_field.reg; rm_field->shift = reg_field.lsb; rm_field->mask = ((BIT(field_bits) - 1) << reg_field.lsb); + rm_field->id_size = reg_field.id_size; + rm_field->id_offset = reg_field.id_offset; } /** @@ -1425,6 +1427,74 @@ 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_fields_write(): Write a value to a single register field with port ID + * + * @field: Register field to write to + * @id: port ID + * @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_fields_write(struct regmap_field *field, unsigned int id, + unsigned int val) +{ + if (id >= field->id_size) + return -EINVAL; + + return regmap_update_bits(field->regmap, + field->reg + (field->id_offset * id), + field->mask, val << field->shift); +} +EXPORT_SYMBOL_GPL(regmap_fields_write); + +/** + * regmap_fields_update_bits(): Perform a read/modify/write cycle + * on the register field + * + * @field: Register field to write to + * @id: port ID + * @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_fields_update_bits(struct regmap_field *field, unsigned int id, + unsigned int mask, unsigned int val) +{ + if (id >= field->id_size) + return -EINVAL; + + mask = (mask << field->shift) & field->mask; + + return regmap_update_bits(field->regmap, + field->reg + (field->id_offset * id), + mask, val << field->shift); +} +EXPORT_SYMBOL_GPL(regmap_fields_update_bits); + /* * regmap_bulk_write(): Write multiple registers to the device * @@ -1736,6 +1806,39 @@ int regmap_field_read(struct regmap_field *field, unsigned int *val) EXPORT_SYMBOL_GPL(regmap_field_read); /** + * regmap_fields_read(): Read a value to a single register field with port ID + * + * @field: Register field to read from + * @id: port ID + * @val: Pointer to store read value + * + * A value of zero will be returned on success, a negative errno will + * be returned in error cases. + */ +int regmap_fields_read(struct regmap_field *field, unsigned int id, + unsigned int *val) +{ + int ret; + unsigned int reg_val; + + if (id >= field->id_size) + return -EINVAL; + + ret = regmap_read(field->regmap, + field->reg + (field->id_offset * id), + ®_val); + if (ret != 0) + return ret; + + reg_val &= field->mask; + reg_val >>= field->shift; + *val = reg_val; + + return ret; +} +EXPORT_SYMBOL_GPL(regmap_fields_read); + +/** * regmap_bulk_read(): Read multiple registers from the device * * @map: Register map to write to |