diff options
Diffstat (limited to 'include/linux/regmap.h')
| -rw-r--r-- | include/linux/regmap.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/regmap.h b/include/linux/regmap.h index b0b9be750d93..caff2240bdab 100644 --- a/include/linux/regmap.h +++ b/include/linux/regmap.h @@ -359,6 +359,10 @@ typedef void (*regmap_unlock)(void *); * @reg_defaults: Power on reset values for registers (for use with * register cache support). * @num_reg_defaults: Number of elements in reg_defaults. + * @reg_default_cb: Optional callback to return default values for registers + * not listed in reg_defaults. This is only used for + * REGCACHE_FLAT population; drivers must ensure the readable_reg/ + * writeable_reg callbacks are defined to handle holes. * * @read_flag_mask: Mask to be set in the top bytes of the register when doing * a read. @@ -449,6 +453,8 @@ struct regmap_config { const struct regmap_access_table *rd_noinc_table; const struct reg_default *reg_defaults; unsigned int num_reg_defaults; + int (*reg_default_cb)(struct device *dev, unsigned int reg, + unsigned int *def); enum regcache_type cache_type; const void *reg_defaults_raw; unsigned int num_reg_defaults_raw; @@ -1349,6 +1355,14 @@ static inline int regmap_write_bits(struct regmap *map, unsigned int reg, return regmap_update_bits_base(map, reg, mask, val, NULL, false, true); } +static inline int regmap_default_zero_cb(struct device *dev, + unsigned int reg, + unsigned int *def) +{ + *def = 0; + return 0; +} + int regmap_get_val_bytes(struct regmap *map); int regmap_get_max_register(struct regmap *map); int regmap_get_reg_stride(struct regmap *map); |