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regmap: Allow regmap_update_bits() to be offloaded with no bus

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Some hardware can do this so let's use that capability.
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Merge tag 'regmap-no-bus-update-bits' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap

Mark Brown says:

===================
regmap: Allow regmap_update_bits() to be offloaded with no bus

Some hardware can do this so let's use that capability.
===================

Link: https://lore.kernel.org/all/YZWDOidBOssP10yS@sirena.org.uk/
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski 2021-11-18 17:50:18 -08:00
commit 3b1abcf128
2 changed files with 8 additions and 0 deletions
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1
drivers/base/regmap/regmap.c
View File

@ -876,6 +876,7 @@ struct regmap *__regmap_init(struct device *dev,
if (!bus) {
map->reg_read = config->reg_read;
map->reg_write = config->reg_write;
map->reg_update_bits = config->reg_update_bits;
map->defer_caching = false;
goto skip_format_initialization;

7
include/linux/regmap.h
View File

@ -290,6 +290,11 @@ typedef void (*regmap_unlock)(void *);
* 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.
* @reg_update_bits: Optional callback that if filled will be used to perform
* all the update_bits(rmw) operation. Should only be provided
* if the function require special handling with lock and reg
* handling and the operation cannot be represented as a simple
* update_bits operation on a bus such as SPI, I2C, etc.
* @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).
@ -372,6 +377,8 @@ struct regmap_config {
int (*reg_read)(void *context, unsigned int reg, unsigned int *val);
int (*reg_write)(void *context, unsigned int reg, unsigned int val);
int (*reg_update_bits)(void *context, unsigned int reg,
unsigned int mask, unsigned int val);
bool fast_io;