diff options
author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2011-12-13 00:10:45 +0800 |
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committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2011-12-13 00:10:45 +0800 |
commit | 4412823a0ac768679c0f31bd9585ebc23b317138 (patch) | |
tree | ef45db21145ae9bb0f746f99939061cf96a4b116 | |
parent | 01ed260f22c429337272bf9d25d393a4efd37d51 (diff) | |
parent | bf315173359b2f3b8b8ccca4264815e91f30be12 (diff) | |
download | op-kernel-dev-4412823a0ac768679c0f31bd9585ebc23b317138.zip op-kernel-dev-4412823a0ac768679c0f31bd9585ebc23b317138.tar.gz |
Merge branch 'topic/cache' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap into HEAD
-rw-r--r-- | drivers/base/regmap/internal.h | 1 | ||||
-rw-r--r-- | drivers/base/regmap/regcache-lzo.c | 2 | ||||
-rw-r--r-- | drivers/base/regmap/regcache.c | 19 | ||||
-rw-r--r-- | drivers/base/regmap/regmap.c | 37 | ||||
-rw-r--r-- | include/linux/regmap.h | 5 |
5 files changed, 61 insertions, 3 deletions
diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h index 348ff02..6483e0b 100644 --- a/drivers/base/regmap/internal.h +++ b/drivers/base/regmap/internal.h @@ -74,6 +74,7 @@ struct regmap { struct reg_default *reg_defaults; const void *reg_defaults_raw; void *cache; + bool cache_dirty; }; struct regcache_ops { diff --git a/drivers/base/regmap/regcache-lzo.c b/drivers/base/regmap/regcache-lzo.c index 066aeec..854448d 100644 --- a/drivers/base/regmap/regcache-lzo.c +++ b/drivers/base/regmap/regcache-lzo.c @@ -351,7 +351,7 @@ static int regcache_lzo_sync(struct regmap *map) } struct regcache_ops regcache_lzo_ops = { - .type = REGCACHE_LZO, + .type = REGCACHE_COMPRESSED, .name = "lzo", .init = regcache_lzo_init, .exit = regcache_lzo_exit, diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c index 666f6f5..6ab9f03 100644 --- a/drivers/base/regmap/regcache.c +++ b/drivers/base/regmap/regcache.c @@ -241,6 +241,8 @@ int regcache_sync(struct regmap *map) map->cache_ops->name); name = map->cache_ops->name; trace_regcache_sync(map->dev, name, "start"); + if (!map->cache_dirty) + goto out; if (map->cache_ops->sync) { ret = map->cache_ops->sync(map); } else { @@ -291,6 +293,23 @@ void regcache_cache_only(struct regmap *map, bool enable) EXPORT_SYMBOL_GPL(regcache_cache_only); /** + * regcache_mark_dirty: Mark the register cache as dirty + * + * @map: map to mark + * + * Mark the register cache as dirty, for example due to the device + * having been powered down for suspend. If the cache is not marked + * as dirty then the cache sync will be suppressed. + */ +void regcache_mark_dirty(struct regmap *map) +{ + mutex_lock(&map->lock); + map->cache_dirty = true; + mutex_unlock(&map->lock); +} +EXPORT_SYMBOL_GPL(regcache_mark_dirty); + +/** * regcache_cache_bypass: Put a register map into cache bypass mode * * @map: map to configure diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index bf441db..579e85b 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -231,6 +231,39 @@ err: EXPORT_SYMBOL_GPL(regmap_init); /** + * regmap_reinit_cache(): Reinitialise the current register cache + * + * @map: Register map to operate on. + * @config: New configuration. Only the cache data will be used. + * + * Discard any existing register cache for the map and initialize a + * new cache. This can be used to restore the cache to defaults or to + * update the cache configuration to reflect runtime discovery of the + * hardware. + */ +int regmap_reinit_cache(struct regmap *map, const struct regmap_config *config) +{ + int ret; + + mutex_lock(&map->lock); + + regcache_exit(map); + + map->max_register = config->max_register; + map->writeable_reg = config->writeable_reg; + map->readable_reg = config->readable_reg; + map->volatile_reg = config->volatile_reg; + map->precious_reg = config->precious_reg; + map->cache_type = config->cache_type; + + ret = regcache_init(map, config); + + mutex_unlock(&map->lock); + + return ret; +} + +/** * regmap_exit(): Free a previously allocated register map */ void regmap_exit(struct regmap *map) @@ -306,8 +339,10 @@ int _regmap_write(struct regmap *map, unsigned int reg, ret = regcache_write(map, reg, val); if (ret != 0) return ret; - if (map->cache_only) + if (map->cache_only) { + map->cache_dirty = true; return 0; + } } trace_regmap_reg_write(map->dev, reg, val); diff --git a/include/linux/regmap.h b/include/linux/regmap.h index 690276a..86923a9 100644 --- a/include/linux/regmap.h +++ b/include/linux/regmap.h @@ -25,7 +25,7 @@ enum regcache_type { REGCACHE_NONE, REGCACHE_INDEXED, REGCACHE_RBTREE, - REGCACHE_LZO + REGCACHE_COMPRESSED }; /** @@ -129,6 +129,8 @@ struct regmap *regmap_init_spi(struct spi_device *dev, const struct regmap_config *config); void regmap_exit(struct regmap *map); +int regmap_reinit_cache(struct regmap *map, + const struct regmap_config *config); int regmap_write(struct regmap *map, unsigned int reg, unsigned int val); int regmap_raw_write(struct regmap *map, unsigned int reg, const void *val, size_t val_len); @@ -143,5 +145,6 @@ int regmap_update_bits(struct regmap *map, unsigned int reg, int regcache_sync(struct regmap *map); void regcache_cache_only(struct regmap *map, bool enable); void regcache_cache_bypass(struct regmap *map, bool enable); +void regcache_mark_dirty(struct regmap *map); #endif |