linux.git/drivers/base/regmap/regmap.c, branch v3.3-rc2

regmap: Reset cache status when reinitialsing the cache

2012-01-20T13:49:30+00:00

When we reinitialise the cache make sure that we reset the cache access
flags, ensuring that the reinitialised cache is in the default state
which is what callers would and do expect given the function name.

This is particularly likely to cause issues in systems where there was no
cache previously as those systems have cache bypass enabled, as for the
wm8994 driver where this was noticed.

Signed-off-by: Mark Brown

Merge branch 'topic/cache' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap into regmap-next

2011-12-05T13:18:50+00:00

regmap: Allow drivers to reinitialise the register cache at runtime

2011-12-05T13:17:36+00:00

Sometimes the register map information may change in ways that drivers can
discover at runtime. For example, new revisions of a device may add new
registers. Support runtime discovery by drivers by allowing the register
cache to be reinitialised with a new function regmap_reinit_cache() which
discards the existing cache and creates a new one.

Signed-off-by: Mark Brown

regmap: Allow regmap_update_bits() users to detect changes

2011-11-29T20:15:50+00:00

Some users of regmap_update_bits() would like to be able to tell their
users if they actually did an update so provide a variant which also
returns a flag indicating if an update took place. We could return a
tristate in the return value of regmap_update_bits() but this makes the
API more cumbersome to use and doesn't fit with the general zero for
success idiom we have.

Signed-off-by: Mark Brown

regmap: Do debugfs init before cache init

2011-11-21T19:48:26+00:00

This allows caches to add custom debugfs files.

Signed-off-by: Mark Brown

regmap: Suppress noop writes in regmap_update_bits()

2011-11-20T20:56:38+00:00

If the new register value is identical to the original one then suppress
the write to the hardware in regmap_update_bits(), saving some I/O cost.

Signed-off-by: Mark Brown

regmap: Add support for 10/14 register formating

2011-11-16T17:34:53+00:00

This patch adds support for 10 bits register, 14 bits value type register
formating. This is for example used by the Analog Devices AD5380.

Signed-off-by: Lars-Peter Clausen 
Signed-off-by: Mark Brown

regmap: Try cached read before checking if a hardware read is possible

2011-11-16T17:34:53+00:00

For some register format types we do not provide a parse_val so we can not do a
hardware read. But a cached read is still possible, so try to read from the
cache first, before checking whether a hardware read is possible. Otherwise the
cache becomes pretty useless for these register types.

Signed-off-by: Lars-Peter Clausen 
Signed-off-by: Mark Brown

regmap: Move initialization of regcache related fields to regcache_init

2011-11-16T17:34:53+00:00

Move the initialization regcache related fields of the regmap struct to
regcache_init. This allows us to keep regmap and regcache code better
separated.

Signed-off-by: Lars-Peter Clausen 
Signed-off-by: Mark Brown

regmap: return ERR_PTR instead of NULL in regmap_init

2011-11-14T21:44:45+00:00

The regmap_init documentation states that it will either return a pointer to a
valid regmap structure or a ERR_PTR in case of an error. Currently it returns a
NULL pointer in case no bus or no config was given. Since NULL is not a
ERR_PTR a caller might assume that it is a pointer to a valid regmap structure,
so return a ERR_PTR(-EINVAL) instead.

Signed-off-by: Lars-Peter Clausen 
Signed-off-by: Mark Brown