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Merge tag 'regmap-v5.0' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap

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Pull regmap updates from Mark Brown:
 "A small update with a couple of new APIs that are useful for some
  small sets of devices:

   - Split up the single_rw flagging to map read and write separately as
     some devices support bulk operations for only read or only write.

   - Add a write version of the noinc API.

   - Clean up the code for LOG_DEVICE a bit"

* tag 'regmap-v5.0' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
  regmap: use less #ifdef for LOG_DEVICE
  regmap: Add regmap_noinc_write API
  regmap: split up regmap_config.use_single_rw
  regmap: fix comment for regmap.use_single_write
This commit is contained in:
Linus Torvalds
2018-10-23 01:17:27 +01:00
parent a36cf68651 ae2399c48c
commit 6214a9fe2a
35 changed files with 203 additions and 57 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/base/regmap/internal.h
View File

@@ -94,11 +94,13 @@ struct regmap {
bool (*readable_reg)(struct device *dev, unsigned int reg);
bool (*volatile_reg)(struct device *dev, unsigned int reg);
bool (*precious_reg)(struct device *dev, unsigned int reg);
bool (*writeable_noinc_reg)(struct device *dev, unsigned int reg);
bool (*readable_noinc_reg)(struct device *dev, unsigned int reg);
const struct regmap_access_table *wr_table;
const struct regmap_access_table *rd_table;
const struct regmap_access_table *volatile_table;
const struct regmap_access_table *precious_table;
const struct regmap_access_table *wr_noinc_table;
const struct regmap_access_table *rd_noinc_table;
int (*reg_read)(void *context, unsigned int reg, unsigned int *val);
@@ -149,7 +151,7 @@ struct regmap {
/* if set, converts bulk read to single read */
bool use_single_read;
/* if set, converts bulk read to single read */
/* if set, converts bulk write to single write */
bool use_single_write;
/* if set, the device supports multi write mode */
bool can_multi_write;
@@ -183,6 +185,7 @@ bool regmap_writeable(struct regmap *map, unsigned int reg);
bool regmap_readable(struct regmap *map, unsigned int reg);
bool regmap_volatile(struct regmap *map, unsigned int reg);
bool regmap_precious(struct regmap *map, unsigned int reg);
bool regmap_writeable_noinc(struct regmap *map, unsigned int reg);
bool regmap_readable_noinc(struct regmap *map, unsigned int reg);
int _regmap_write(struct regmap *map, unsigned int reg,

99
drivers/base/regmap/regmap.c
View File

@@ -35,6 +35,16 @@
*/
#undef LOG_DEVICE
#ifdef LOG_DEVICE
static inline bool regmap_should_log(struct regmap *map)
{
return (map->dev && strcmp(dev_name(map->dev), LOG_DEVICE) == 0);
}
#else
static inline bool regmap_should_log(struct regmap *map) { return false; }
#endif
static int _regmap_update_bits(struct regmap *map, unsigned int reg,
unsigned int mask, unsigned int val,
bool *change, bool force_write);
@@ -168,6 +178,17 @@ bool regmap_precious(struct regmap *map, unsigned int reg)
return false;
}
bool regmap_writeable_noinc(struct regmap *map, unsigned int reg)
{
if (map->writeable_noinc_reg)
return map->writeable_noinc_reg(map->dev, reg);
if (map->wr_noinc_table)
return regmap_check_range_table(map, reg, map->wr_noinc_table);
return true;
}
bool regmap_readable_noinc(struct regmap *map, unsigned int reg)
{
if (map->readable_noinc_reg)
@@ -762,8 +783,8 @@ struct regmap *__regmap_init(struct device *dev,
map->reg_stride_order = ilog2(map->reg_stride);
else
map->reg_stride_order = -1;
map->use_single_read = config->use_single_rw || !bus || !bus->read;
map->use_single_write = config->use_single_rw || !bus || !bus->write;
map->use_single_read = config->use_single_read || !bus || !bus->read;
map->use_single_write = config->use_single_write || !bus || !bus->write;
map->can_multi_write = config->can_multi_write && bus && bus->write;
if (bus) {
map->max_raw_read = bus->max_raw_read;
@@ -777,11 +798,13 @@ struct regmap *__regmap_init(struct device *dev,
map->rd_table = config->rd_table;
map->volatile_table = config->volatile_table;
map->precious_table = config->precious_table;
map->wr_noinc_table = config->wr_noinc_table;
map->rd_noinc_table = config->rd_noinc_table;
map->writeable_reg = config->writeable_reg;
map->readable_reg = config->readable_reg;
map->volatile_reg = config->volatile_reg;
map->precious_reg = config->precious_reg;
map->writeable_noinc_reg = config->writeable_noinc_reg;
map->readable_noinc_reg = config->readable_noinc_reg;
map->cache_type = config->cache_type;
@@ -1298,6 +1321,7 @@ int regmap_reinit_cache(struct regmap *map, const struct regmap_config *config)
map->readable_reg = config->readable_reg;
map->volatile_reg = config->volatile_reg;
map->precious_reg = config->precious_reg;
map->writeable_noinc_reg = config->writeable_noinc_reg;
map->readable_noinc_reg = config->readable_noinc_reg;
map->cache_type = config->cache_type;
@@ -1755,10 +1779,8 @@ int _regmap_write(struct regmap *map, unsigned int reg,
}
}
#ifdef LOG_DEVICE
if (map->dev && strcmp(dev_name(map->dev), LOG_DEVICE) == 0)
if (regmap_should_log(map))
dev_info(map->dev, "%x <= %x\n", reg, val);
#endif
trace_regmap_reg_write(map, reg, val);
@@ -1897,6 +1919,69 @@ int regmap_raw_write(struct regmap *map, unsigned int reg,
}
EXPORT_SYMBOL_GPL(regmap_raw_write);
/**
* regmap_noinc_write(): Write data from a register without incrementing the
* register number
*
* @map: Register map to write to
* @reg: Register to write to
* @val: Pointer to data buffer
* @val_len: Length of output buffer in bytes.
*
* The regmap API usually assumes that bulk bus write operations will write a
* range of registers. Some devices have certain registers for which a write
* operation can write to an internal FIFO.
*
* The target register must be volatile but registers after it can be
* completely unrelated cacheable registers.
*
* This will attempt multiple writes as required to write val_len bytes.
*
* A value of zero will be returned on success, a negative errno will be
* returned in error cases.
*/
int regmap_noinc_write(struct regmap *map, unsigned int reg,
const void *val, size_t val_len)
{
size_t write_len;
int ret;
if (!map->bus)
return -EINVAL;
if (!map->bus->write)
return -ENOTSUPP;
if (val_len % map->format.val_bytes)
return -EINVAL;
if (!IS_ALIGNED(reg, map->reg_stride))
return -EINVAL;
if (val_len == 0)
return -EINVAL;
map->lock(map->lock_arg);
if (!regmap_volatile(map, reg) || !regmap_writeable_noinc(map, reg)) {
ret = -EINVAL;
goto out_unlock;
}
while (val_len) {
if (map->max_raw_write && map->max_raw_write < val_len)
write_len = map->max_raw_write;
else
write_len = val_len;
ret = _regmap_raw_write(map, reg, val, write_len);
if (ret)
goto out_unlock;
val = ((u8 *)val) + write_len;
val_len -= write_len;
}
out_unlock:
map->unlock(map->lock_arg);
return ret;
}
EXPORT_SYMBOL_GPL(regmap_noinc_write);
/**
* regmap_field_update_bits_base() - Perform a read/modify/write cycle a
* register field.
@@ -2450,10 +2535,8 @@ static int _regmap_read(struct regmap *map, unsigned int reg,
ret = map->reg_read(context, reg, val);
if (ret == 0) {
#ifdef LOG_DEVICE
if (map->dev && strcmp(dev_name(map->dev), LOG_DEVICE) == 0)
if (regmap_should_log(map))
dev_info(map->dev, "%x => %x\n", reg, *val);
#endif
trace_regmap_reg_read(map, reg, *val);