From: Mark Brown <broonie@kernel.org>
Date: Fri, 3 Nov 2017 11:38:04 +0000 (+0100)
Subject: regmap: Add a config option for hwspinlock
X-Git-Tag: v4.19~2257^2^3~4
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f25637a6b89e59eddf79f6df39b23e202753f555;p=platform%2Fkernel%2Flinux-rpi.git

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>
---

diff --git a/drivers/base/regmap/Kconfig b/drivers/base/regmap/Kconfig
index 073c0b7..2d5e849 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 999e981..ff6ef6a 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) {