It would be convenient if one could use the regmap API in conjunction with register maps defined as structs (i.e. structs that directly mirror the memory layout of the registers in question). A similar approach was planned with the regmap_write32/regmap_read32 macros, but was never used.
Hence, implement regmap_set/regmap_range_set and regmap_get/regmap_range_get macros, which, given a register map, a struct describing the layout of the register map, and a member name automatically produce regmap_read/regmap_write calls that access the specified member in the register map.
Signed-off-by: Mario Six mario.six@gdsys.cc Reviewed-by: Simon Glass sjg@chromium.org ---
v2 -> v3: * Fixed style violations * Added documentation
v1 -> v2: New in v2
--- include/regmap.h | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++---- 1 file changed, 50 insertions(+), 4 deletions(-)
diff --git a/include/regmap.h b/include/regmap.h index e157910cfd7..6c774d735b8 100644 --- a/include/regmap.h +++ b/include/regmap.h @@ -128,11 +128,57 @@ int regmap_raw_write_range(struct regmap *map, uint range_num, uint offset, int regmap_raw_read_range(struct regmap *map, uint range_num, uint offset, void *valp, size_t val_len);
-#define regmap_write32(map, ptr, member, val) \ - regmap_write(map, (uint32_t *)(ptr)->member - (uint32_t *)(ptr), val) +/** + * regmap_range_set() - Set a value in a regmap range described by a struct + * @map: Regmap in which a value should be set + * @range: Range of the regmap in which a value should be set + * @type: Structure type that describes the memory layout of the regmap range + * @member: Member of the describing structure that should be set in the regmap + * range + * @val: Value which should be written to the regmap range + */ +#define regmap_range_set(map, range, type, member, val) \ + do { \ + typeof(((type *)0)->member) __tmp = val; \ + regmap_raw_write_range(map, range, offsetof(type, member), \ + &__tmp, sizeof(((type *)0)->member)); \ + } while (0) + +/** + * regmap_set() - Set a value in a regmap described by a struct + * @map: Regmap in which a value should be set + * @type: Structure type that describes the memory layout of the regmap + * @member: Member of the describing structure that should be set in the regmap + * @val: Value which should be written to the regmap + */ +#define regmap_set(map, type, member, val) \ + regmap_range_set(map, 0, type, member, val)
-#define regmap_read32(map, ptr, member, valp) \ - regmap_read(map, (uint32_t *)(ptr)->member - (uint32_t *)(ptr), valp) +/** + * regmap_range_get() - Get a value from a regmap range described by a struct + * @map: Regmap from which a value should be read + * @range: Range of the regmap from which a value should be read + * @type: Structure type that describes the memory layout of the regmap + * range + * @member: Member of the describing structure that should be read in the + * regmap range + * @valp: Variable that receives the value read from the regmap range + */ +#define regmap_range_get(map, range, type, member, valp) \ + regmap_raw_read_range(map, range, offsetof(type, member), \ + (void *)valp, sizeof(((type *)0)->member)) + +/** + * regmap_get() - Get a value from a regmap described by a struct + * @map: Regmap from which a value should be read + * @type: Structure type that describes the memory layout of the regmap + * range + * @member: Member of the describing structure that should be read in the + * regmap + * @valp: Variable that receives the value read from the regmap + */ +#define regmap_get(map, type, member, valp) \ + regmap_range_get(map, 0, type, member, valp)
/** * regmap_update_bits() - Perform a read/modify/write using a mask -- 2.11.0