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| author |   Mark Brown <broonie@kernel.org> | 2017-11-03 12:38:04 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2017-11-03 12:38:04 +0100 |
| commit | f25637a6b89e59eddf79f6df39b23e202753f555 (patch) | |
| tree | 1a957c0c714a688db42351d73c268449b4a7ffad /drivers/base | |
| parent | regmap: Add hardware spinlock support (diff) | |
| download | linux-dev-f25637a6b89e59eddf79f6df39b23e202753f555.tar.xz linux-dev-f25637a6b89e59eddf79f6df39b23e202753f555.zip | |
regmap: Add a config option for hwspinlock
Unlike other lock types hwspinlocks are optional and can be built
modular so we can't use them unconditionally in regmap so add a config
option that drivers that want to use hwspinlocks with regmap can select
which will ensure that hwspinlock is built in.
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/regmap/Kconfig | 4 | ||||
| -rw-r--r-- | drivers/base/regmap/regmap.c | 7 |
2 files changed, 11 insertions, 0 deletions
diff --git a/drivers/base/regmap/Kconfig b/drivers/base/regmap/Kconfig index 073c0b77e5b3..2d5e849f79c9 100644 --- a/drivers/base/regmap/Kconfig +++ b/drivers/base/regmap/Kconfig @@ -5,6 +5,7 @@ config REGMAP default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_SPMI || REGMAP_W1 || REGMAP_AC97 || REGMAP_MMIO || REGMAP_IRQ) select IRQ_DOMAIN if REGMAP_IRQ + select HWSPINLOCK if REGMAP_HWSPINLOCK bool config REGCACHE_COMPRESSED @@ -36,3 +37,6 @@ config REGMAP_MMIO config REGMAP_IRQ bool + +config REGMAP_HWSPINLOCK + bool diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index 999e981a174a..ff6ef6a579c6 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -414,6 +414,7 @@ static unsigned int regmap_parse_64_native(const void *buf) } #endif +#ifdef REGMAP_HWSPINLOCK static void regmap_lock_hwlock(void *__map) { struct regmap *map = __map; @@ -456,6 +457,7 @@ static void regmap_unlock_hwlock_irqrestore(void *__map) hwspin_unlock_irqrestore(map->hwlock, &map->spinlock_flags); } +#endif static void regmap_lock_mutex(void *__map) { @@ -672,6 +674,7 @@ struct regmap *__regmap_init(struct device *dev, map->unlock = config->unlock; map->lock_arg = config->lock_arg; } else if (config->hwlock_id) { +#ifdef REGMAP_HWSPINLOCK map->hwlock = hwspin_lock_request_specific(config->hwlock_id); if (!map->hwlock) { ret = -ENXIO; @@ -694,6 +697,10 @@ struct regmap *__regmap_init(struct device *dev, } map->lock_arg = map; +#else + ret = -EINVAL; + goto err; +#endif } else { if ((bus && bus->fast_io) || config->fast_io) { |