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regmap: make LZO cache optional

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Commit 2cbbb579bcbe3 ("regmap: Add the LZO cache support") added support
for LZO compression in regcache, but there were never any users added
afterwards. Since LZO support itself has its own size, it currently is
rather a deoptimization.

So make it optional by introducing a symbol that can be selected by
drivers wanting to make use of it.

Saves e.g. ~46 kB on MIPS (size of LZO support + regcache LZO code).

Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Jonas Gorski 2017-06-02 15:15:37 +02:00 committed by Mark Brown
parent 2ea659a9ef
commit 34a730aa74
3 changed files with 8 additions and 2 deletions
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5
drivers/base/regmap/Kconfig
View File

@ -4,9 +4,12 @@
config REGMAP
default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_SPMI || REGMAP_AC97 || REGMAP_MMIO || REGMAP_IRQ)
select IRQ_DOMAIN if REGMAP_IRQ
bool
config REGCACHE_COMPRESSED
select LZO_COMPRESS
select LZO_DECOMPRESS
select IRQ_DOMAIN if REGMAP_IRQ
bool
config REGMAP_AC97

3
drivers/base/regmap/Makefile
View File

@ -2,7 +2,8 @@
CFLAGS_regmap.o := -I$(src)
obj-$(CONFIG_REGMAP) += regmap.o regcache.o
obj-$(CONFIG_REGMAP) += regcache-rbtree.o regcache-lzo.o regcache-flat.o
obj-$(CONFIG_REGMAP) += regcache-rbtree.o regcache-flat.o
obj-$(CONFIG_REGCACHE_COMPRESSED) += regcache-lzo.o
obj-$(CONFIG_DEBUG_FS) += regmap-debugfs.o
obj-$(CONFIG_REGMAP_AC97) += regmap-ac97.o
obj-$(CONFIG_REGMAP_I2C) += regmap-i2c.o

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

@ -21,7 +21,9 @@
static const struct regcache_ops *cache_types[] = {
&regcache_rbtree_ops,
#if IS_ENABLED(CONFIG_REGCHACHE_COMPRESSED)
&regcache_lzo_ops,
#endif
&regcache_flat_ops,
};