diff options
Diffstat (limited to 'drivers/base/regmap/regmap.c')
| -rw-r--r-- | drivers/base/regmap/regmap.c | 31 |
1 files changed, 28 insertions, 3 deletions
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index df2d2ef5d6b3..51fa7d66a393 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -1777,8 +1777,6 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val, size_t val_bytes = map->format.val_bytes; size_t total_size = val_bytes * val_count; - if (map->bus && !map->format.parse_inplace) - return -EINVAL; if (!IS_ALIGNED(reg, map->reg_stride)) return -EINVAL; @@ -1789,7 +1787,8 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val, * * The first if block is used for memory mapped io. It does not allow * val_bytes of 3 for example. - * The second one is used for busses which do not have this limitation + * The second one is for busses that do not provide raw I/O. + * The third one is used for busses which do not have these limitations * and can write arbitrary value lengths. */ if (!map->bus) { @@ -1825,6 +1824,32 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val, } out: map->unlock(map->lock_arg); + } else if (map->bus && !map->format.parse_inplace) { + const u8 *u8 = val; + const u16 *u16 = val; + const u32 *u32 = val; + unsigned int ival; + + for (i = 0; i < val_count; i++) { + switch (map->format.val_bytes) { + case 4: + ival = u32[i]; + break; + case 2: + ival = u16[i]; + break; + case 1: + ival = u8[i]; + break; + default: + return -EINVAL; + } + + ret = regmap_write(map, reg + (i * map->reg_stride), + ival); + if (ret) + return ret; + } } else if (map->use_single_write || (map->max_raw_write && map->max_raw_write < total_size)) { int chunk_stride = map->reg_stride; |