Commit 4a6be7bb authored by Mark Brown's avatar Mark Brown

Merge remote-tracking branches 'regmap/topic/patch' and 'regmap/topic/sync' into regmap-next

parents 7d9aca39 f9353e70
......@@ -88,7 +88,7 @@ struct regcache_ops {
int (*exit)(struct regmap *map);
int (*read)(struct regmap *map, unsigned int reg, unsigned int *value);
int (*write)(struct regmap *map, unsigned int reg, unsigned int value);
int (*sync)(struct regmap *map);
int (*sync)(struct regmap *map, unsigned int min, unsigned int max);
};
bool regmap_writeable(struct regmap *map, unsigned int reg);
......
......@@ -331,7 +331,8 @@ static int regcache_lzo_write(struct regmap *map,
return ret;
}
static int regcache_lzo_sync(struct regmap *map)
static int regcache_lzo_sync(struct regmap *map, unsigned int min,
unsigned int max)
{
struct regcache_lzo_ctx **lzo_blocks;
unsigned int val;
......@@ -339,7 +340,12 @@ static int regcache_lzo_sync(struct regmap *map)
int ret;
lzo_blocks = map->cache;
for_each_set_bit(i, lzo_blocks[0]->sync_bmp, lzo_blocks[0]->sync_bmp_nbits) {
i = min;
for_each_set_bit_cont(i, lzo_blocks[0]->sync_bmp,
lzo_blocks[0]->sync_bmp_nbits) {
if (i > max)
continue;
ret = regcache_read(map, i, &val);
if (ret)
return ret;
......
......@@ -357,7 +357,8 @@ static int regcache_rbtree_write(struct regmap *map, unsigned int reg,
return 0;
}
static int regcache_rbtree_sync(struct regmap *map)
static int regcache_rbtree_sync(struct regmap *map, unsigned int min,
unsigned int max)
{
struct regcache_rbtree_ctx *rbtree_ctx;
struct rb_node *node;
......@@ -365,12 +366,30 @@ static int regcache_rbtree_sync(struct regmap *map)
unsigned int regtmp;
unsigned int val;
int ret;
int i;
int i, base, end;
rbtree_ctx = map->cache;
for (node = rb_first(&rbtree_ctx->root); node; node = rb_next(node)) {
rbnode = rb_entry(node, struct regcache_rbtree_node, node);
for (i = 0; i < rbnode->blklen; i++) {
if (rbnode->base_reg < min)
continue;
if (rbnode->base_reg > max)
break;
if (rbnode->base_reg + rbnode->blklen < min)
continue;
if (min > rbnode->base_reg)
base = min - rbnode->base_reg;
else
base = 0;
if (max < rbnode->base_reg + rbnode->blklen)
end = rbnode->base_reg + rbnode->blklen - max;
else
end = rbnode->blklen;
for (i = base; i < end; i++) {
regtmp = rbnode->base_reg + i;
val = regcache_rbtree_get_register(rbnode, i,
map->cache_word_size);
......
......@@ -252,12 +252,11 @@ int regcache_write(struct regmap *map,
int regcache_sync(struct regmap *map)
{
int ret = 0;
unsigned int val;
unsigned int i;
const char *name;
unsigned int bypass;
BUG_ON(!map->cache_ops);
BUG_ON(!map->cache_ops || !map->cache_ops->sync);
mutex_lock(&map->lock);
/* Remember the initial bypass state */
......@@ -282,24 +281,11 @@ int regcache_sync(struct regmap *map)
}
map->cache_bypass = 0;
if (map->cache_ops->sync) {
ret = map->cache_ops->sync(map);
} else {
for (i = 0; i < map->num_reg_defaults; i++) {
ret = regcache_read(map, i, &val);
if (ret < 0)
goto out;
map->cache_bypass = 1;
ret = _regmap_write(map, i, val);
map->cache_bypass = 0;
if (ret < 0)
goto out;
dev_dbg(map->dev, "Synced register %#x, value %#x\n",
map->reg_defaults[i].reg,
map->reg_defaults[i].def);
}
ret = map->cache_ops->sync(map, 0, map->max_register);
if (ret == 0)
map->cache_dirty = false;
}
out:
trace_regcache_sync(map->dev, name, "stop");
/* Restore the bypass state */
......@@ -310,6 +296,51 @@ int regcache_sync(struct regmap *map)
}
EXPORT_SYMBOL_GPL(regcache_sync);
/**
* regcache_sync_region: Sync part of the register cache with the hardware.
*
* @map: map to sync.
* @min: first register to sync
* @max: last register to sync
*
* Write all non-default register values in the specified region to
* the hardware.
*
* Return a negative value on failure, 0 on success.
*/
int regcache_sync_region(struct regmap *map, unsigned int min,
unsigned int max)
{
int ret = 0;
const char *name;
unsigned int bypass;
BUG_ON(!map->cache_ops || !map->cache_ops->sync);
mutex_lock(&map->lock);
/* Remember the initial bypass state */
bypass = map->cache_bypass;
name = map->cache_ops->name;
dev_dbg(map->dev, "Syncing %s cache from %d-%d\n", name, min, max);
trace_regcache_sync(map->dev, name, "start region");
if (!map->cache_dirty)
goto out;
ret = map->cache_ops->sync(map, min, max);
out:
trace_regcache_sync(map->dev, name, "stop region");
/* Restore the bypass state */
map->cache_bypass = bypass;
mutex_unlock(&map->lock);
return ret;
}
/**
* regcache_cache_only: Put a register map into cache only mode
*
......
......@@ -158,6 +158,8 @@ int regmap_update_bits_check(struct regmap *map, unsigned int reg,
bool *change);
int regcache_sync(struct regmap *map);
int regcache_sync_region(struct regmap *map, unsigned int min,
unsigned int max);
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);
......
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