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-rw-r--r--drivers/base/regmap/internal.h8
-rw-r--r--drivers/base/regmap/regcache-rbtree.c4
-rw-r--r--drivers/base/regmap/regcache.c20
-rw-r--r--drivers/base/regmap/regmap.c62
4 files changed, 64 insertions, 30 deletions
diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h
index b95fd1f25295..e46c279f8280 100644
--- a/drivers/base/regmap/internal.h
+++ b/drivers/base/regmap/internal.h
@@ -31,8 +31,14 @@ struct regmap_format {
unsigned int (*parse_val)(void *buf);
};
+typedef void (*regmap_lock)(struct regmap *map);
+typedef void (*regmap_unlock)(struct regmap *map);
+
struct regmap {
- struct mutex lock;
+ struct mutex mutex;
+ spinlock_t spinlock;
+ regmap_lock lock;
+ regmap_unlock unlock;
struct device *dev; /* Device we do I/O on */
void *work_buf; /* Scratch buffer used to format I/O */
diff --git a/drivers/base/regmap/regcache-rbtree.c b/drivers/base/regmap/regcache-rbtree.c
index 5157fa04c2f0..cca46007d969 100644
--- a/drivers/base/regmap/regcache-rbtree.c
+++ b/drivers/base/regmap/regcache-rbtree.c
@@ -139,7 +139,7 @@ static int rbtree_show(struct seq_file *s, void *ignored)
int nodes = 0;
int registers = 0;
- mutex_lock(&map->lock);
+ map->lock(map);
for (node = rb_first(&rbtree_ctx->root); node != NULL;
node = rb_next(node)) {
@@ -155,7 +155,7 @@ static int rbtree_show(struct seq_file *s, void *ignored)
seq_printf(s, "%d nodes, %d registers, average %d registers\n",
nodes, registers, registers / nodes);
- mutex_unlock(&map->lock);
+ map->unlock(map);
return 0;
}
diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index 87f54dbf601b..4ad18505e9ae 100644
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -264,7 +264,7 @@ int regcache_sync(struct regmap *map)
BUG_ON(!map->cache_ops || !map->cache_ops->sync);
- mutex_lock(&map->lock);
+ map->lock(map);
/* Remember the initial bypass state */
bypass = map->cache_bypass;
dev_dbg(map->dev, "Syncing %s cache\n",
@@ -296,7 +296,7 @@ out:
trace_regcache_sync(map->dev, name, "stop");
/* Restore the bypass state */
map->cache_bypass = bypass;
- mutex_unlock(&map->lock);
+ map->unlock(map);
return ret;
}
@@ -323,7 +323,7 @@ int regcache_sync_region(struct regmap *map, unsigned int min,
BUG_ON(!map->cache_ops || !map->cache_ops->sync);
- mutex_lock(&map->lock);
+ map->lock(map);
/* Remember the initial bypass state */
bypass = map->cache_bypass;
@@ -342,7 +342,7 @@ out:
trace_regcache_sync(map->dev, name, "stop region");
/* Restore the bypass state */
map->cache_bypass = bypass;
- mutex_unlock(&map->lock);
+ map->unlock(map);
return ret;
}
@@ -361,11 +361,11 @@ out:
*/
void regcache_cache_only(struct regmap *map, bool enable)
{
- mutex_lock(&map->lock);
+ map->lock(map);
WARN_ON(map->cache_bypass && enable);
map->cache_only = enable;
trace_regmap_cache_only(map->dev, enable);
- mutex_unlock(&map->lock);
+ map->unlock(map);
}
EXPORT_SYMBOL_GPL(regcache_cache_only);
@@ -380,9 +380,9 @@ EXPORT_SYMBOL_GPL(regcache_cache_only);
*/
void regcache_mark_dirty(struct regmap *map)
{
- mutex_lock(&map->lock);
+ map->lock(map);
map->cache_dirty = true;
- mutex_unlock(&map->lock);
+ map->unlock(map);
}
EXPORT_SYMBOL_GPL(regcache_mark_dirty);
@@ -399,11 +399,11 @@ EXPORT_SYMBOL_GPL(regcache_mark_dirty);
*/
void regcache_cache_bypass(struct regmap *map, bool enable)
{
- mutex_lock(&map->lock);
+ map->lock(map);
WARN_ON(map->cache_only && enable);
map->cache_bypass = enable;
trace_regmap_cache_bypass(map->dev, enable);
- mutex_unlock(&map->lock);
+ map->unlock(map);
}
EXPORT_SYMBOL_GPL(regcache_cache_bypass);
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index bde30c5d5ee9..6b4a775b439b 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -158,6 +158,26 @@ static unsigned int regmap_parse_32(void *buf)
return b[0];
}
+static void regmap_lock_mutex(struct regmap *map)
+{
+ mutex_lock(&map->mutex);
+}
+
+static void regmap_unlock_mutex(struct regmap *map)
+{
+ mutex_unlock(&map->mutex);
+}
+
+static void regmap_lock_spinlock(struct regmap *map)
+{
+ spin_lock(&map->spinlock);
+}
+
+static void regmap_unlock_spinlock(struct regmap *map)
+{
+ spin_unlock(&map->spinlock);
+}
+
/**
* regmap_init(): Initialise register map
*
@@ -187,7 +207,15 @@ struct regmap *regmap_init(struct device *dev,
goto err;
}
- mutex_init(&map->lock);
+ if (bus->fast_io) {
+ spin_lock_init(&map->spinlock);
+ map->lock = regmap_lock_spinlock;
+ map->unlock = regmap_unlock_spinlock;
+ } else {
+ mutex_init(&map->mutex);
+ map->lock = regmap_lock_mutex;
+ map->unlock = regmap_unlock_mutex;
+ }
map->format.buf_size = (config->reg_bits + config->val_bits) / 8;
map->format.reg_bytes = DIV_ROUND_UP(config->reg_bits, 8);
map->format.pad_bytes = config->pad_bits / 8;
@@ -365,7 +393,7 @@ int regmap_reinit_cache(struct regmap *map, const struct regmap_config *config)
{
int ret;
- mutex_lock(&map->lock);
+ map->lock(map);
regcache_exit(map);
regmap_debugfs_exit(map);
@@ -384,7 +412,7 @@ int regmap_reinit_cache(struct regmap *map, const struct regmap_config *config)
ret = regcache_init(map, config);
- mutex_unlock(&map->lock);
+ map->unlock(map);
return ret;
}
@@ -536,11 +564,11 @@ int regmap_write(struct regmap *map, unsigned int reg, unsigned int val)
{
int ret;
- mutex_lock(&map->lock);
+ map->lock(map);
ret = _regmap_write(map, reg, val);
- mutex_unlock(&map->lock);
+ map->unlock(map);
return ret;
}
@@ -567,11 +595,11 @@ int regmap_raw_write(struct regmap *map, unsigned int reg,
{
int ret;
- mutex_lock(&map->lock);
+ map->lock(map);
ret = _regmap_raw_write(map, reg, val, val_len);
- mutex_unlock(&map->lock);
+ map->unlock(map);
return ret;
}
@@ -601,7 +629,7 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val,
if (!map->format.parse_val)
return -EINVAL;
- mutex_lock(&map->lock);
+ map->lock(map);
/* No formatting is require if val_byte is 1 */
if (val_bytes == 1) {
@@ -622,7 +650,7 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val,
kfree(wval);
out:
- mutex_unlock(&map->lock);
+ map->unlock(map);
return ret;
}
EXPORT_SYMBOL_GPL(regmap_bulk_write);
@@ -696,11 +724,11 @@ int regmap_read(struct regmap *map, unsigned int reg, unsigned int *val)
{
int ret;
- mutex_lock(&map->lock);
+ map->lock(map);
ret = _regmap_read(map, reg, val);
- mutex_unlock(&map->lock);
+ map->unlock(map);
return ret;
}
@@ -725,7 +753,7 @@ int regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
unsigned int v;
int ret, i;
- mutex_lock(&map->lock);
+ map->lock(map);
if (regmap_volatile_range(map, reg, val_count) || map->cache_bypass ||
map->cache_type == REGCACHE_NONE) {
@@ -746,7 +774,7 @@ int regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
}
out:
- mutex_unlock(&map->lock);
+ map->unlock(map);
return ret;
}
@@ -799,7 +827,7 @@ static int _regmap_update_bits(struct regmap *map, unsigned int reg,
int ret;
unsigned int tmp, orig;
- mutex_lock(&map->lock);
+ map->lock(map);
ret = _regmap_read(map, reg, &orig);
if (ret != 0)
@@ -816,7 +844,7 @@ static int _regmap_update_bits(struct regmap *map, unsigned int reg,
}
out:
- mutex_unlock(&map->lock);
+ map->unlock(map);
return ret;
}
@@ -883,7 +911,7 @@ int regmap_register_patch(struct regmap *map, const struct reg_default *regs,
if (map->patch)
return -EBUSY;
- mutex_lock(&map->lock);
+ map->lock(map);
bypass = map->cache_bypass;
@@ -911,7 +939,7 @@ int regmap_register_patch(struct regmap *map, const struct reg_default *regs,
out:
map->cache_bypass = bypass;
- mutex_unlock(&map->lock);
+ map->unlock(map);
return ret;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-18 17:21:11 +0100