regmap_get_offset
reg + regmap_get_offset(map, i);
offset = noinc ? 0 : regmap_get_offset(map, i / val_bytes);
reg += regmap_get_offset(map, chunk_regs);
if (!regmap_volatile(map, reg + regmap_get_offset(map, i)))
reg + regmap_get_offset(map, i),
reg += regmap_get_offset(map, chunk_regs);
ret = _regmap_read(map, reg + regmap_get_offset(map, i),
ret = _regmap_read(map, reg + regmap_get_offset(map, i), &ival);