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authorMark Brown <broonie@opensource.wolfsonmicro.com>2012-03-14 13:14:24 +0000
committerMark Brown <broonie@opensource.wolfsonmicro.com>2012-03-14 13:14:24 +0000
commit4a6be7bb7474500a69f6d8f25899b8038491bdbb (patch)
treea2645b0f707fcf1ea94a9e7ef7a59b298fb5ecac /drivers/base
parent7d9aca39dcacd2b3f42e2e287162329f410f93e1 (diff)
parentf9353e70bcebd00cd182d946083afd7d8eddd259 (diff)
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Merge remote-tracking branches 'regmap/topic/patch' and 'regmap/topic/sync' into regmap-next
Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/regmap/internal.h2
-rw-r--r--drivers/base/regmap/regcache-lzo.c10
-rw-r--r--drivers/base/regmap/regcache-rbtree.c25
-rw-r--r--drivers/base/regmap/regcache.c69
4 files changed, 81 insertions, 25 deletions
diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h
index abd7667..fcafc5b 100644
--- a/drivers/base/regmap/internal.h
+++ b/drivers/base/regmap/internal.h
@@ -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);
diff --git a/drivers/base/regmap/regcache-lzo.c b/drivers/base/regmap/regcache-lzo.c
index 3025cf9..8d00615 100644
--- a/drivers/base/regmap/regcache-lzo.c
+++ b/drivers/base/regmap/regcache-lzo.c
@@ -331,7 +331,8 @@ out:
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;
diff --git a/drivers/base/regmap/regcache-rbtree.c b/drivers/base/regmap/regcache-rbtree.c
index 861ad2c..8d51916 100644
--- a/drivers/base/regmap/regcache-rbtree.c
+++ b/drivers/base/regmap/regcache-rbtree.c
@@ -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);
diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index 8db713f..fb84d71 100644
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -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 */
@@ -311,6 +297,51 @@ out:
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
*
* @map: map to configure