renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-11-18 15:44:02 +08:00
Code

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

Browse Source
This commit is contained in:
Mark Brown 2013-02-14 17:11:09 +00:00
commit a2b37efc4e
3 changed files with 65 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/base/regmap/internal.h
View File

@ -91,6 +91,8 @@ struct regmap {
int (*reg_read)(void *context, unsigned int reg, unsigned int *val);
int (*reg_write)(void *context, unsigned int reg, unsigned int val);
bool defer_caching;
u8 read_flag_mask;
u8 write_flag_mask;

56
drivers/base/regmap/regmap.c
View File

@ -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;
}
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)

18
include/linux/regmap.h
View File

@ -128,7 +128,18 @@ typedef void (*regmap_unlock)(void *);
* @lock_arg: this field is passed as the only argument of lock/unlock
* functions (ignored in case regular lock/unlock functions
* are not overridden).
*
* @reg_read: Optional callback that if filled will be used to perform
* all the reads from the registers. Should only be provided for
* devices whos read operation cannot be represented as a simple read
* operation on a bus such as SPI, I2C, etc. Most of the devices do
* not need this.
* @reg_write: Same as above for writing.
* @fast_io: Register IO is fast. Use a spinlock instead of a mutex
* to perform locking. This field is ignored if custom lock/unlock
* functions are used (see fields lock/unlock of struct regmap_config).
* This field is a duplicate of a similar file in
* 'struct regmap_bus' and serves exact same purpose.
* Use it only for "no-bus" cases.
* @max_register: Optional, specifies the maximum valid register index.
* @wr_table: Optional, points to a struct regmap_access_table specifying
* valid ranges for write access.
@ -178,6 +189,11 @@ struct regmap_config {
regmap_unlock unlock;
void *lock_arg;
int (*reg_read)(void *context, unsigned int reg, unsigned int *val);
int (*reg_write)(void *context, unsigned int reg, unsigned int val);
bool fast_io;
unsigned int max_register;
const struct regmap_access_table *wr_table;
const struct regmap_access_table *rd_table;