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Merge branches 'fix/raw', 'topic/core', 'topic/i2c', 'topic/raw' and 'topic/doc' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap into regmap-smbus-block

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This commit is contained in:
Mark Brown 2015-08-30 10:19:11 +01:00
commit 10524612e8
5 changed files with 49 additions and 17 deletions
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6
drivers/base/regmap/internal.h
View file

@ -139,8 +139,10 @@ struct regmap {
struct reg_default *patch;
int patch_regs;
/* if set, converts bulk rw to single rw */
bool use_single_rw;
/* if set, converts bulk read to single read */
bool use_single_read;
/* if set, converts bulk read to single read */
bool use_single_write;
/* if set, the device supports multi write mode */
bool can_multi_write;

2
drivers/base/regmap/regcache.c
View file

@ -729,7 +729,7 @@ int regcache_sync_block(struct regmap *map, void *block,
unsigned int block_base, unsigned int start,
unsigned int end)
{
if (regmap_can_raw_write(map) && !map->use_single_rw)
if (regmap_can_raw_write(map) && !map->use_single_write)
return regcache_sync_block_raw(map, block, cache_present,
block_base, start, end);
else

4
drivers/base/regmap/regmap-irq.c
View file

@ -209,7 +209,7 @@ static irqreturn_t regmap_irq_thread(int irq, void *d)
* Read in the statuses, using a single bulk read if possible
* in order to reduce the I/O overheads.
*/
if (!map->use_single_rw && map->reg_stride == 1 &&
if (!map->use_single_read && map->reg_stride == 1 &&
data->irq_reg_stride == 1) {
u8 *buf8 = data->status_reg_buf;
u16 *buf16 = data->status_reg_buf;
@ -398,7 +398,7 @@ int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags,
else
d->irq_reg_stride = 1;
if (!map->use_single_rw && map->reg_stride == 1 &&
if (!map->use_single_read && map->reg_stride == 1 &&
d->irq_reg_stride == 1) {
d->status_reg_buf = kmalloc(map->format.val_bytes *
chip->num_regs, GFP_KERNEL);

49
drivers/base/regmap/regmap.c
View file

@ -93,6 +93,9 @@ bool regmap_writeable(struct regmap *map, unsigned int reg)
bool regmap_readable(struct regmap *map, unsigned int reg)
{
if (!map->reg_read)
return false;
if (map->max_register && reg > map->max_register)
return false;
@ -573,8 +576,9 @@ struct regmap *regmap_init(struct device *dev,
map->reg_stride = config->reg_stride;
else
map->reg_stride = 1;
map->use_single_rw = config->use_single_rw;
map->can_multi_write = config->can_multi_write;
map->use_single_read = config->use_single_rw || !bus || !bus->read;
map->use_single_write = config->use_single_rw || !bus || !bus->write;
map->can_multi_write = config->can_multi_write && bus && bus->write;
map->dev = dev;
map->bus = bus;
map->bus_context = bus_context;
@ -763,7 +767,7 @@ struct regmap *regmap_init(struct device *dev,
if ((reg_endian != REGMAP_ENDIAN_BIG) ||
(val_endian != REGMAP_ENDIAN_BIG))
goto err_map;
map->use_single_rw = true;
map->use_single_write = true;
}
if (!map->format.format_write &&
@ -1382,7 +1386,8 @@ int _regmap_raw_write(struct regmap *map, unsigned int reg,
*/
bool regmap_can_raw_write(struct regmap *map)
{
return map->bus && map->format.format_val && map->format.format_reg;
return map->bus && map->bus->write && map->format.format_val &&
map->format.format_reg;
}
EXPORT_SYMBOL_GPL(regmap_can_raw_write);
@ -1677,9 +1682,15 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val,
/*
* Some devices don't support bulk write, for
* them we have a series of single write operations.
* them we have a series of single write operations in the first two if
* blocks.
*
* The first if block is used for memory mapped io. It does not allow
* val_bytes of 3 for example.
* The second one is used for busses which do not have this limitation
* and can write arbitrary value lengths.
*/
if (!map->bus || map->use_single_rw) {
if (!map->bus) {
map->lock(map->lock_arg);
for (i = 0; i < val_count; i++) {
unsigned int ival;
@ -1711,6 +1722,17 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val,
}
out:
map->unlock(map->lock_arg);
} else if (map->use_single_write) {
map->lock(map->lock_arg);
for (i = 0; i < val_count; i++) {
ret = _regmap_raw_write(map,
reg + (i * map->reg_stride),
val + (i * val_bytes),
val_bytes);
if (ret)
break;
}
map->unlock(map->lock_arg);
} else {
void *wval;
@ -1740,7 +1762,7 @@ EXPORT_SYMBOL_GPL(regmap_bulk_write);
*
* the (register,newvalue) pairs in regs have not been formatted, but
* they are all in the same page and have been changed to being page
* relative. The page register has been written if that was neccessary.
* relative. The page register has been written if that was necessary.
*/
static int _regmap_raw_multi_reg_write(struct regmap *map,
const struct reg_default *regs,
@ -2050,7 +2072,7 @@ static int _regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
/*
* Some buses or devices flag reads by setting the high bits in the
* register addresss; since it's always the high bits for all
* register address; since it's always the high bits for all
* current formats we can do this here rather than in
* formatting. This may break if we get interesting formats.
*/
@ -2097,8 +2119,6 @@ static int _regmap_read(struct regmap *map, unsigned int reg,
int ret;
void *context = _regmap_map_get_context(map);
WARN_ON(!map->reg_read);
if (!map->cache_bypass) {
ret = regcache_read(map, reg, val);
if (ret == 0)
@ -2179,11 +2199,18 @@ int regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
return -EINVAL;
if (reg % map->reg_stride)
return -EINVAL;
if (val_count == 0)
return -EINVAL;
map->lock(map->lock_arg);
if (regmap_volatile_range(map, reg, val_count) || map->cache_bypass ||
map->cache_type == REGCACHE_NONE) {
if (!map->bus->read) {
ret = -ENOTSUPP;
goto out;
}
/* Physical block read if there's no cache involved */
ret = _regmap_raw_read(map, reg, val, val_len);
@ -2292,7 +2319,7 @@ int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val,
* Some devices does not support bulk read, for
* them we have a series of single read operations.
*/
if (map->use_single_rw) {
if (map->use_single_read) {
for (i = 0; i < val_count; i++) {
ret = regmap_raw_read(map,
reg + (i * map->reg_stride),

5
include/linux/regmap.h
View file

@ -296,8 +296,12 @@ typedef void (*regmap_hw_free_context)(void *context);
* if not implemented on a given device.
* @async_write: Write operation which completes asynchronously, optional and
* must serialise with respect to non-async I/O.
* @reg_write: Write a single register value to the given register address. This
* write operation has to complete when returning from the function.
* @read: Read operation. Data is returned in the buffer used to transmit
* data.
* @reg_read: Read a single register value from a given register address.
* @free_context: Free context.
* @async_alloc: Allocate a regmap_async() structure.
* @read_flag_mask: Mask to be set in the top byte of the register when doing
* a read.
@ -307,7 +311,6 @@ typedef void (*regmap_hw_free_context)(void *context);
* @val_format_endian_default: Default endianness for formatted register
* values. Used when the regmap_config specifies DEFAULT. If this is
* DEFAULT, BIG is assumed.
* @async_size: Size of struct used for async work.
*/
struct regmap_bus {
bool fast_io;