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author | Ashish Jangam <ashish.jangam@kpitcummins.com> | 2012-04-30 23:23:40 +0100 |
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committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-04-30 23:29:56 +0100 |
commit | 2e33caf16f7a1903d226ef7f9f5ec6a234fee18e (patch) | |
tree | b557691a1197a035eee85df52d4eb05bcb9f02fb /drivers/base | |
parent | 56806555de5485d6786bf0f8df01b8ed9fc5d006 (diff) | |
download | op-kernel-dev-2e33caf16f7a1903d226ef7f9f5ec6a234fee18e.zip op-kernel-dev-2e33caf16f7a1903d226ef7f9f5ec6a234fee18e.tar.gz |
regmap: Converts group operation into single read write operations
Some devices does not support bulk read and write operations, for them
we have series of single write and read operations.
Signed-off-by: Anthony Olech <Anthony.Olech@diasemi.com>
Signed-off-by: Ashish Jangam <ashish.jangam@kpitcummins.com>
[Fixed coding style, don't check use_single_rw before assign --broonie ]
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/base')
-rw-r--r-- | drivers/base/regmap/internal.h | 3 | ||||
-rw-r--r-- | drivers/base/regmap/regmap.c | 40 |
2 files changed, 39 insertions, 4 deletions
diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h index d92e9b1..2eb7197 100644 --- a/drivers/base/regmap/internal.h +++ b/drivers/base/regmap/internal.h @@ -91,6 +91,9 @@ struct regmap { struct reg_default *patch; int patch_regs; + + /* if set, converts bulk rw to single rw */ + bool use_single_rw; }; struct regcache_ops { diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index 8a25006..0a05a70 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -247,6 +247,7 @@ struct regmap *regmap_init(struct device *dev, map->reg_stride = config->reg_stride; else map->reg_stride = 1; + map->use_single_rw = config->use_single_rw; map->dev = dev; map->bus = bus; map->bus_context = bus_context; @@ -686,7 +687,22 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val, for (i = 0; i < val_count * val_bytes; i += val_bytes) map->format.parse_val(wval + i); } - ret = _regmap_raw_write(map, reg, wval, val_bytes * val_count); + /* + * Some devices does not support bulk write, for + * them we have a series of single write operations. + */ + if (map->use_single_rw) { + for (i = 0; i < val_count; i++) { + ret = regmap_raw_write(map, + reg + (i * map->reg_stride), + val + (i * val_bytes), + val_bytes); + if (ret != 0) + return ret; + } + } else { + ret = _regmap_raw_write(map, reg, wval, val_bytes * val_count); + } if (val_bytes != 1) kfree(wval); @@ -855,9 +871,25 @@ int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val, return -EINVAL; if (vol || map->cache_type == REGCACHE_NONE) { - ret = regmap_raw_read(map, reg, val, val_bytes * val_count); - if (ret != 0) - return ret; + /* + * Some devices does not support bulk read, for + * them we have a series of single read operations. + */ + if (map->use_single_rw) { + for (i = 0; i < val_count; i++) { + ret = regmap_raw_read(map, + reg + (i * map->reg_stride), + val + (i * val_bytes), + val_bytes); + if (ret != 0) + return ret; + } + } else { + ret = regmap_raw_read(map, reg, val, + val_bytes * val_count); + if (ret != 0) + return ret; + } for (i = 0; i < val_count * val_bytes; i += val_bytes) map->format.parse_val(val + i); |