linux-4.4.1/regmap_bulk_write()
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開始行:
*参照元 [#ld3a9dc2]
#backlinks
*説明 [#u7f6ece0]
-パス: 複数あり
--CONFIG_REGMAP 有効: [[linux-4.4.1/drivers/base/regmap/r...
--CONFIG_REGMAP 無効: [[linux-4.4.1/include/linux/regmap....
-FIXME: これは何？
--説明
**引数 [#k5c6efd0]
-struct regmap *map
--
--[[linux-4.4.1/regmap]]
-unsigned int reg
--
-const void *val
--
-size_t val_count
--
**返り値 [#m6be09c9]
-int
--
**参考 [#s37a4ad7]
*実装 [#ed39fd67]
**CONFIG_REGMAP 有効: drivers/base/regmap/regmap.c [#he61...
/*
* regmap_bulk_write(): Write multiple registers to the ...
*
* @map: Register map to write to
* @reg: First register to be write from
* @val: Block of data to be written, in native register...
* @val_count: Number of registers to write
*
* This function is intended to be used for writing a la...
* data to the device either in single transfer or multi...
*
* A value of zero will be returned on success, a negati...
* be returned in error cases.
*/
int regmap_bulk_write(struct regmap *map, unsigned int r...
size_t val_count)
{
int ret = 0, i;
size_t val_bytes = map->format.val_bytes;
size_t total_size = val_bytes * val_count;
if (map->bus && !map->format.parse_inplace)
return -EINVAL;
if (reg % map->reg_stride)
return -EINVAL;
-
--map->format は struct regmap_format 型
--[[linux-4.4.1/regmap_format]]
/*
* Some devices don't support bulk write, for
* them we have a series of single write operations in ...
* blocks.
*
* The first if block is used for memory mapped io. It ...
* val_bytes of 3 for example.
* The second one is used for busses which do not have ...
* and can write arbitrary value lengths.
*/
if (!map->bus) {
map->lock(map->lock_arg);
for (i = 0; i < val_count; i++) {
unsigned int ival;
switch (val_bytes) {
case 1:
ival = *(u8 *)(val + (i * val_bytes));
break;
case 2:
ival = *(u16 *)(val + (i * val_bytes));
break;
case 4:
ival = *(u32 *)(val + (i * val_bytes));
break;
#ifdef CONFIG_64BIT
-
--[[linux-4.4.1/CONFIG_64BIT]]
case 8:
ival = *(u64 *)(val + (i * val_bytes));
break;
#endif
default:
ret = -EINVAL;
goto out;
}
ret = _regmap_write(map, reg + (i * map->reg_stride),
ival);
if (ret != 0)
goto out;
-
--[[linux-4.4.1/_regmap_write()]]
}
out:
map->unlock(map->lock_arg);
} else if (map->use_single_write ||
(map->max_raw_write && map->max_raw_write < total_s...
int chunk_stride = map->reg_stride;
size_t chunk_size = val_bytes;
size_t chunk_count = val_count;
if (!map->use_single_write) {
chunk_size = map->max_raw_write;
if (chunk_size % val_bytes)
chunk_size -= chunk_size % val_bytes;
chunk_count = total_size / chunk_size;
chunk_stride *= chunk_size / val_bytes;
}
map->lock(map->lock_arg);
/* Write as many bytes as possible with chunk_size */
for (i = 0; i < chunk_count; i++) {
ret = _regmap_raw_write(map,
reg + (i * chunk_stride),
val + (i * chunk_size),
chunk_size);
if (ret)
break;
-
--[[linux-4.4.1/_regmap_raw_write()]]
}
/* Write remaining bytes */
if (!ret && chunk_size * i < total_size) {
ret = _regmap_raw_write(map, reg + (i * chunk_stride),
val + (i * chunk_size),
total_size - i * chunk_size);
}
map->unlock(map->lock_arg);
} else {
void *wval;
if (!val_count)
return -EINVAL;
wval = kmemdup(val, val_count * val_bytes, map->alloc_...
if (!wval) {
dev_err(map->dev, "Error in memory allocation\n");
return -ENOMEM;
}
for (i = 0; i < val_count * val_bytes; i += val_bytes)
map->format.parse_inplace(wval + i);
-
--[[linux-4.4.1/kmemdup()]]
--map->format は struct regmap_format 型
--[[linux-4.4.1/regmap_format]]
map->lock(map->lock_arg);
ret = _regmap_raw_write(map, reg, wval, val_bytes * va...
map->unlock(map->lock_arg);
kfree(wval);
-
--[[linux-4.4.1/kfree()]]
}
return ret;
}
EXPORT_SYMBOL_GPL(regmap_bulk_write);
-GPL ライセンスのモジュールにのみシンボルを公開する。
--[[linux-4.4.1/EXPORT_SYMBOL_GPL()]]
**CONFIG_REGMAP 無効: include/linux/regmap.h [#x3a87025]
static inline int regmap_bulk_write(struct regmap *map, ...
const void *val, size_t val_count)
{
WARN_ONCE(1, "regmap API is disabled");
-
--[[linux-4.4.1/WARN_ONCE()]]
return -EINVAL;
}
*コメント [#b142b58a]
終了行:
*参照元 [#ld3a9dc2]
#backlinks
*説明 [#u7f6ece0]
-パス: 複数あり
--CONFIG_REGMAP 有効: [[linux-4.4.1/drivers/base/regmap/r...
--CONFIG_REGMAP 無効: [[linux-4.4.1/include/linux/regmap....
-FIXME: これは何？
--説明
**引数 [#k5c6efd0]
-struct regmap *map
--
--[[linux-4.4.1/regmap]]
-unsigned int reg
--
-const void *val
--
-size_t val_count
--
**返り値 [#m6be09c9]
-int
--
**参考 [#s37a4ad7]
*実装 [#ed39fd67]
**CONFIG_REGMAP 有効: drivers/base/regmap/regmap.c [#he61...
/*
* regmap_bulk_write(): Write multiple registers to the ...
*
* @map: Register map to write to
* @reg: First register to be write from
* @val: Block of data to be written, in native register...
* @val_count: Number of registers to write
*
* This function is intended to be used for writing a la...
* data to the device either in single transfer or multi...
*
* A value of zero will be returned on success, a negati...
* be returned in error cases.
*/
int regmap_bulk_write(struct regmap *map, unsigned int r...
size_t val_count)
{
int ret = 0, i;
size_t val_bytes = map->format.val_bytes;
size_t total_size = val_bytes * val_count;
if (map->bus && !map->format.parse_inplace)
return -EINVAL;
if (reg % map->reg_stride)
return -EINVAL;
-
--map->format は struct regmap_format 型
--[[linux-4.4.1/regmap_format]]
/*
* Some devices don't support bulk write, for
* them we have a series of single write operations in ...
* blocks.
*
* The first if block is used for memory mapped io. It ...
* val_bytes of 3 for example.
* The second one is used for busses which do not have ...
* and can write arbitrary value lengths.
*/
if (!map->bus) {
map->lock(map->lock_arg);
for (i = 0; i < val_count; i++) {
unsigned int ival;
switch (val_bytes) {
case 1:
ival = *(u8 *)(val + (i * val_bytes));
break;
case 2:
ival = *(u16 *)(val + (i * val_bytes));
break;
case 4:
ival = *(u32 *)(val + (i * val_bytes));
break;
#ifdef CONFIG_64BIT
-
--[[linux-4.4.1/CONFIG_64BIT]]
case 8:
ival = *(u64 *)(val + (i * val_bytes));
break;
#endif
default:
ret = -EINVAL;
goto out;
}
ret = _regmap_write(map, reg + (i * map->reg_stride),
ival);
if (ret != 0)
goto out;
-
--[[linux-4.4.1/_regmap_write()]]
}
out:
map->unlock(map->lock_arg);
} else if (map->use_single_write ||
(map->max_raw_write && map->max_raw_write < total_s...
int chunk_stride = map->reg_stride;
size_t chunk_size = val_bytes;
size_t chunk_count = val_count;
if (!map->use_single_write) {
chunk_size = map->max_raw_write;
if (chunk_size % val_bytes)
chunk_size -= chunk_size % val_bytes;
chunk_count = total_size / chunk_size;
chunk_stride *= chunk_size / val_bytes;
}
map->lock(map->lock_arg);
/* Write as many bytes as possible with chunk_size */
for (i = 0; i < chunk_count; i++) {
ret = _regmap_raw_write(map,
reg + (i * chunk_stride),
val + (i * chunk_size),
chunk_size);
if (ret)
break;
-
--[[linux-4.4.1/_regmap_raw_write()]]
}
/* Write remaining bytes */
if (!ret && chunk_size * i < total_size) {
ret = _regmap_raw_write(map, reg + (i * chunk_stride),
val + (i * chunk_size),
total_size - i * chunk_size);
}
map->unlock(map->lock_arg);
} else {
void *wval;
if (!val_count)
return -EINVAL;
wval = kmemdup(val, val_count * val_bytes, map->alloc_...
if (!wval) {
dev_err(map->dev, "Error in memory allocation\n");
return -ENOMEM;
}
for (i = 0; i < val_count * val_bytes; i += val_bytes)
map->format.parse_inplace(wval + i);
-
--[[linux-4.4.1/kmemdup()]]
--map->format は struct regmap_format 型
--[[linux-4.4.1/regmap_format]]
map->lock(map->lock_arg);
ret = _regmap_raw_write(map, reg, wval, val_bytes * va...
map->unlock(map->lock_arg);
kfree(wval);
-
--[[linux-4.4.1/kfree()]]
}
return ret;
}
EXPORT_SYMBOL_GPL(regmap_bulk_write);
-GPL ライセンスのモジュールにのみシンボルを公開する。
--[[linux-4.4.1/EXPORT_SYMBOL_GPL()]]
**CONFIG_REGMAP 無効: include/linux/regmap.h [#x3a87025]
static inline int regmap_bulk_write(struct regmap *map, ...
const void *val, size_t val_count)
{
WARN_ONCE(1, "regmap API is disabled");
-
--[[linux-4.4.1/WARN_ONCE()]]
return -EINVAL;
}
*コメント [#b142b58a]
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