regmap: introduce tables for readable/writeable/volatile/precious checks

[deliverable/linux.git] / drivers / base / regmap / regmap.c

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index c7465f19f674b6aab0a1a0626500bc48184db42e..96f7e8523ee8498ea63673f074cfd0389a2c440d 100644 (file)
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -34,6 +34,36 @@ static int _regmap_update_bits(struct regmap *map, unsigned int reg,
                               unsigned int mask, unsigned int val,
                               bool *change);
 
+bool regmap_reg_in_ranges(unsigned int reg,
+                         const struct regmap_range *ranges,
+                         unsigned int nranges)
+{
+       const struct regmap_range *r;
+       int i;
+
+       for (i = 0, r = ranges; i < nranges; i++, r++)
+               if (regmap_reg_in_range(reg, r))
+                       return true;
+       return false;
+}
+EXPORT_SYMBOL_GPL(regmap_reg_in_ranges);
+
+static bool _regmap_check_range_table(struct regmap *map,
+                                     unsigned int reg,
+                                     const struct regmap_access_table *table)
+{
+       /* Check "no ranges" first */
+       if (regmap_reg_in_ranges(reg, table->no_ranges, table->n_no_ranges))
+               return false;
+
+       /* In case zero "yes ranges" are supplied, any reg is OK */
+       if (!table->n_yes_ranges)
+               return true;
+
+       return regmap_reg_in_ranges(reg, table->yes_ranges,
+                                   table->n_yes_ranges);
+}
+
 bool regmap_writeable(struct regmap *map, unsigned int reg)
 {
        if (map->max_register && reg > map->max_register)
@@ -42,6 +72,9 @@ bool regmap_writeable(struct regmap *map, unsigned int reg)
        if (map->writeable_reg)
                return map->writeable_reg(map->dev, reg);
 
+       if (map->wr_table)
+               return _regmap_check_range_table(map, reg, map->wr_table);
+
        return true;
 }
 
@@ -56,6 +89,9 @@ bool regmap_readable(struct regmap *map, unsigned int reg)
        if (map->readable_reg)
                return map->readable_reg(map->dev, reg);
 
+       if (map->rd_table)
+               return _regmap_check_range_table(map, reg, map->rd_table);
+
        return true;
 }
 
@@ -67,6 +103,9 @@ bool regmap_volatile(struct regmap *map, unsigned int reg)
        if (map->volatile_reg)
                return map->volatile_reg(map->dev, reg);
 
+       if (map->volatile_table)
+               return _regmap_check_range_table(map, reg, map->volatile_table);
+
        return true;
 }
 
@@ -78,6 +117,9 @@ bool regmap_precious(struct regmap *map, unsigned int reg)
        if (map->precious_reg)
                return map->precious_reg(map->dev, reg);
 
+       if (map->precious_table)
+               return _regmap_check_range_table(map, reg, map->precious_table);
+
        return false;
 }
 
@@ -214,23 +256,27 @@ static unsigned int regmap_parse_32_native(void *buf)
        return *(u32 *)buf;
 }
 
-static void regmap_lock_mutex(struct regmap *map)
+static void regmap_lock_mutex(void *__map)
 {
+       struct regmap *map = __map;
        mutex_lock(&map->mutex);
 }
 
-static void regmap_unlock_mutex(struct regmap *map)
+static void regmap_unlock_mutex(void *__map)
 {
+       struct regmap *map = __map;
        mutex_unlock(&map->mutex);
 }
 
-static void regmap_lock_spinlock(struct regmap *map)
+static void regmap_lock_spinlock(void *__map)
 {
+       struct regmap *map = __map;
        spin_lock(&map->spinlock);
 }
 
-static void regmap_unlock_spinlock(struct regmap *map)
+static void regmap_unlock_spinlock(void *__map)
 {
+       struct regmap *map = __map;
        spin_unlock(&map->spinlock);
 }
 
@@ -335,14 +381,21 @@ struct regmap *regmap_init(struct device *dev,
                goto err;
        }
 
-       if (bus->fast_io) {
-               spin_lock_init(&map->spinlock);
-               map->lock = regmap_lock_spinlock;
-               map->unlock = regmap_unlock_spinlock;
+       if (config->lock && config->unlock) {
+               map->lock = config->lock;
+               map->unlock = config->unlock;
+               map->lock_arg = config->lock_arg;
        } else {
-               mutex_init(&map->mutex);
-               map->lock = regmap_lock_mutex;
-               map->unlock = regmap_unlock_mutex;
+               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->lock_arg = map;
        }
        map->format.reg_bytes = DIV_ROUND_UP(config->reg_bits, 8);
        map->format.pad_bytes = config->pad_bits / 8;
@@ -359,6 +412,10 @@ struct regmap *regmap_init(struct device *dev,
        map->bus = bus;
        map->bus_context = bus_context;
        map->max_register = config->max_register;
+       map->wr_table = config->wr_table;
+       map->rd_table = config->rd_table;
+       map->volatile_table = config->volatile_table;
+       map->precious_table = config->precious_table;
        map->writeable_reg = config->writeable_reg;
        map->readable_reg = config->readable_reg;
        map->volatile_reg = config->volatile_reg;
@@ -994,11 +1051,11 @@ int regmap_write(struct regmap *map, unsigned int reg, unsigned int val)
        if (reg % map->reg_stride)
                return -EINVAL;
 
-       map->lock(map);
+       map->lock(map->lock_arg);
 
        ret = _regmap_write(map, reg, val);
 
-       map->unlock(map);
+       map->unlock(map->lock_arg);
 
        return ret;
 }
@@ -1030,11 +1087,11 @@ int regmap_raw_write(struct regmap *map, unsigned int reg,
        if (reg % map->reg_stride)
                return -EINVAL;
 
-       map->lock(map);
+       map->lock(map->lock_arg);
 
        ret = _regmap_raw_write(map, reg, val, val_len);
 
-       map->unlock(map);
+       map->unlock(map->lock_arg);
 
        return ret;
 }
@@ -1066,7 +1123,7 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val,
        if (reg % map->reg_stride)
                return -EINVAL;
 
-       map->lock(map);
+       map->lock(map->lock_arg);
 
        /* No formatting is require if val_byte is 1 */
        if (val_bytes == 1) {
@@ -1102,7 +1159,7 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val,
                kfree(wval);
 
 out:
-       map->unlock(map);
+       map->unlock(map->lock_arg);
        return ret;
 }
 EXPORT_SYMBOL_GPL(regmap_bulk_write);
@@ -1197,11 +1254,11 @@ int regmap_read(struct regmap *map, unsigned int reg, unsigned int *val)
        if (reg % map->reg_stride)
                return -EINVAL;
 
-       map->lock(map);
+       map->lock(map->lock_arg);
 
        ret = _regmap_read(map, reg, val);
 
-       map->unlock(map);
+       map->unlock(map->lock_arg);
 
        return ret;
 }
@@ -1231,7 +1288,7 @@ int regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
        if (reg % map->reg_stride)
                return -EINVAL;
 
-       map->lock(map);
+       map->lock(map->lock_arg);
 
        if (regmap_volatile_range(map, reg, val_count) || map->cache_bypass ||
            map->cache_type == REGCACHE_NONE) {
@@ -1253,7 +1310,7 @@ int regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
        }
 
  out:
-       map->unlock(map);
+       map->unlock(map->lock_arg);
 
        return ret;
 }
@@ -1360,9 +1417,9 @@ int regmap_update_bits(struct regmap *map, unsigned int reg,
        bool change;
        int ret;
 
-       map->lock(map);
+       map->lock(map->lock_arg);
        ret = _regmap_update_bits(map, reg, mask, val, &change);
-       map->unlock(map);
+       map->unlock(map->lock_arg);
 
        return ret;
 }
@@ -1386,9 +1443,9 @@ int regmap_update_bits_check(struct regmap *map, unsigned int reg,
 {
        int ret;
 
-       map->lock(map);
+       map->lock(map->lock_arg);
        ret = _regmap_update_bits(map, reg, mask, val, change);
-       map->unlock(map);
+       map->unlock(map->lock_arg);
        return ret;
 }
 EXPORT_SYMBOL_GPL(regmap_update_bits_check);
@@ -1417,7 +1474,7 @@ int regmap_register_patch(struct regmap *map, const struct reg_default *regs,
        if (map->patch)
                return -EBUSY;
 
-       map->lock(map);
+       map->lock(map->lock_arg);
 
        bypass = map->cache_bypass;
 
@@ -1445,7 +1502,7 @@ int regmap_register_patch(struct regmap *map, const struct reg_default *regs,
 out:
        map->cache_bypass = bypass;
 
-       map->unlock(map);
+       map->unlock(map->lock_arg);
 
        return ret;
 }