Merge remote-tracking branch 'regmap/topic/no-bus' into regmap-next

1 files changed, 46 insertions, 12 deletions

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index b1d962434cb2..3d2367501fd0 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -389,7 +389,7 @@ struct regmap *regmap_init(struct device *dev,
         enum regmap_endian reg_endian, val_endian;
         int i, j;
 
-        if (!bus || !config)
+        if (!config)
                 goto err;
 
         map = kzalloc(sizeof(*map), GFP_KERNEL);
@@ -403,7 +403,8 @@ struct regmap *regmap_init(struct device *dev,
                 map->unlock = config->unlock;
                 map->lock_arg = config->lock_arg;
         } else {
-                if (bus->fast_io) {
+                if ((bus && bus->fast_io) ||
+                    config->fast_io) {
                         spin_lock_init(&map->spinlock);
                         map->lock = regmap_lock_spinlock;
                         map->unlock = regmap_unlock_spinlock;
@@ -447,11 +448,19 @@ struct regmap *regmap_init(struct device *dev,
         if (config->read_flag_mask || config->write_flag_mask) {
                 map->read_flag_mask = config->read_flag_mask;
                 map->write_flag_mask = config->write_flag_mask;
-        } else {
+        } else if (bus) {
                 map->read_flag_mask = bus->read_flag_mask;
         }
 
-        map->reg_read = _regmap_bus_read;
+        if (!bus) {
+                map->reg_read  = config->reg_read;
+                map->reg_write = config->reg_write;
+
+                map->defer_caching = false;
+                goto skip_format_initialization;
+        } else {
+                map->reg_read  = _regmap_bus_read;
+        }
 
         reg_endian = config->reg_format_endian;
         if (reg_endian == REGMAP_ENDIAN_DEFAULT)
@@ -604,10 +613,15 @@ struct regmap *regmap_init(struct device *dev,
                 goto err_map;
         }
 
-        if (map->format.format_write)
+        if (map->format.format_write) {
+                map->defer_caching = false;
                 map->reg_write = _regmap_bus_formatted_write;
-        else if (map->format.format_val)
+        } else if (map->format.format_val) {
+                map->defer_caching = true;
                 map->reg_write = _regmap_bus_raw_write;
+        }
+
+skip_format_initialization:
 
         map->range_tree = RB_ROOT;
         for (i = 0; i < config->num_ranges; i++) {
@@ -810,7 +824,7 @@ void regmap_exit(struct regmap *map)
         regcache_exit(map);
         regmap_debugfs_exit(map);
         regmap_range_exit(map);
-        if (map->bus->free_context)
+        if (map->bus && map->bus->free_context)
                 map->bus->free_context(map->bus_context);
         kfree(map->work_buf);
         kfree(map);
@@ -916,6 +930,8 @@ static int _regmap_raw_write(struct regmap *map, unsigned int reg,
         size_t len;
         int i;
 
+        BUG_ON(!map->bus);
+
         /* Check for unwritable registers before we start */
         if (map->writeable_reg)
                 for (i = 0; i < val_len / map->format.val_bytes; i++)
@@ -1068,7 +1084,7 @@ static int _regmap_bus_formatted_write(void *context, unsigned int reg,
         struct regmap_range_node *range;
         struct regmap *map = context;
 
-        BUG_ON(!map->format.format_write);
+        BUG_ON(!map->bus || !map->format.format_write);
 
         range = _regmap_range_lookup(map, reg);
         if (range) {
@@ -1094,7 +1110,7 @@ static int _regmap_bus_raw_write(void *context, unsigned int reg,
 {
         struct regmap *map = context;
 
-        BUG_ON(!map->format.format_val);
+        BUG_ON(!map->bus || !map->format.format_val);
 
         map->format.format_val(map->work_buf + map->format.reg_bytes
                                + map->format.pad_bytes, val, 0);
@@ -1105,12 +1121,18 @@ static int _regmap_bus_raw_write(void *context, unsigned int reg,
                                  map->format.val_bytes, false);
 }
 
+static inline void *_regmap_map_get_context(struct regmap *map)
+{
+        return (map->bus) ? map : map->bus_context;
+}
+
 int _regmap_write(struct regmap *map, unsigned int reg,
                   unsigned int val)
 {
         int ret;
+        void *context = _regmap_map_get_context(map);
 
-        if (!map->cache_bypass && map->format.format_write) {
+        if (!map->cache_bypass && !map->defer_caching) {
                 ret = regcache_write(map, reg, val);
                 if (ret != 0)
                         return ret;
@@ -1127,7 +1149,7 @@ int _regmap_write(struct regmap *map, unsigned int reg,
 
         trace_regmap_reg_write(map->dev, reg, val);
 
-        return map->reg_write(map, reg, val);
+        return map->reg_write(context, reg, val);
 }
 
 /**
@@ -1178,6 +1200,8 @@ int regmap_raw_write(struct regmap *map, unsigned int reg,
 {
         int ret;
 
+        if (!map->bus)
+                return -EINVAL;
         if (val_len % map->format.val_bytes)
                 return -EINVAL;
         if (reg % map->reg_stride)
@@ -1214,6 +1238,8 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val,
         size_t val_bytes = map->format.val_bytes;
         void *wval;
 
+        if (!map->bus)
+                return -EINVAL;
         if (!map->format.parse_val)
                 return -EINVAL;
         if (reg % map->reg_stride)
@@ -1310,6 +1336,8 @@ static int _regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
         u8 *u8 = map->work_buf;
         int ret;
 
+        BUG_ON(!map->bus);
+
         range = _regmap_range_lookup(map, reg);
         if (range) {
                 ret = _regmap_select_page(map, &reg, range,
@@ -1361,6 +1389,8 @@ static int _regmap_read(struct regmap *map, unsigned int reg,
                         unsigned int *val)
 {
         int ret;
+        void *context = _regmap_map_get_context(map);
+
         BUG_ON(!map->reg_read);
 
         if (!map->cache_bypass) {
@@ -1372,7 +1402,7 @@ static int _regmap_read(struct regmap *map, unsigned int reg,
         if (map->cache_only)
                 return -EBUSY;
 
-        ret = map->reg_read(map, reg, val);
+        ret = map->reg_read(context, reg, val);
         if (ret == 0) {
 #ifdef LOG_DEVICE
                 if (strcmp(dev_name(map->dev), LOG_DEVICE) == 0)
@@ -1434,6 +1464,8 @@ int regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
         unsigned int v;
         int ret, i;
 
+        if (!map->bus)
+                return -EINVAL;
         if (val_len % map->format.val_bytes)
                 return -EINVAL;
         if (reg % map->reg_stride)
@@ -1485,6 +1517,8 @@ int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val,
         size_t val_bytes = map->format.val_bytes;
         bool vol = regmap_volatile_range(map, reg, val_count);
 
+        if (!map->bus)
+                return -EINVAL;
         if (!map->format.parse_val)
                 return -EINVAL;
         if (reg % map->reg_stride)