regmap: Incorporate the regcache core into regmap

This patch incorporates the regcache core code into regmap.  All previous
patches have been no-ops essentially up to this point.

The bulk read operation is not supported by regcache at the moment.  This
will be implemented incrementally.

Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
Tested-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index e7adfe7..3596465 100644 (file)
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -146,6 +146,13 @@ struct regmap *regmap_init(struct device *dev,
        map->readable_reg = config->readable_reg;
        map->volatile_reg = config->volatile_reg;
        map->precious_reg = config->precious_reg;
+       map->cache_type = config->cache_type;
+       map->reg_defaults = config->reg_defaults;
+       map->num_reg_defaults = config->num_reg_defaults;
+       map->num_reg_defaults_raw = config->num_reg_defaults_raw;
+       map->reg_defaults_raw = config->reg_defaults_raw;
+       map->cache_size_raw = (config->val_bits / 8) * config->num_reg_defaults_raw;
+       map->cache_word_size = config->val_bits / 8;
 
        if (config->read_flag_mask || config->write_flag_mask) {
                map->read_flag_mask = config->read_flag_mask;
@@ -208,6 +215,10 @@ struct regmap *regmap_init(struct device *dev,
                goto err_map;
        }
 
+       ret = regcache_init(map);
+       if (ret < 0)
+               goto err_map;
+
        regmap_debugfs_init(map);
 
        return map;
@@ -224,6 +235,7 @@ EXPORT_SYMBOL_GPL(regmap_init);
  */
 void regmap_exit(struct regmap *map)
 {
+       regcache_exit(map);
        regmap_debugfs_exit(map);
        kfree(map->work_buf);
        kfree(map);
@@ -290,6 +302,14 @@ static int _regmap_write(struct regmap *map, unsigned int reg,
        int ret;
        BUG_ON(!map->format.format_write && !map->format.format_val);
 
+       if (!map->cache_bypass) {
+               ret = regcache_write(map, reg, val);
+               if (ret != 0)
+                       return ret;
+               if (map->cache_only)
+                       return 0;
+       }
+
        trace_regmap_reg_write(map->dev, reg, val);
 
        if (map->format.format_write) {
@@ -403,6 +423,15 @@ static int _regmap_read(struct regmap *map, unsigned int reg,
        if (!map->format.parse_val)
                return -EINVAL;
 
+       if (!map->cache_bypass) {
+               ret = regcache_read(map, reg, val);
+               if (ret == 0)
+                       return 0;
+       }
+
+       if (map->cache_only)
+               return -EBUSY;
+
        ret = _regmap_raw_read(map, reg, map->work_buf, map->format.val_bytes);
        if (ret == 0) {
                *val = map->format.parse_val(map->work_buf);
@@ -479,6 +508,8 @@ int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val,
        int ret, i;
        size_t val_bytes = map->format.val_bytes;
 
+       WARN_ON(map->cache_type != REGCACHE_NONE);
+
        if (!map->format.parse_val)
                return -EINVAL;