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authorMark Brown <broonie@opensource.wolfsonmicro.com>2012-12-11 12:39:30 +0900
committerMark Brown <broonie@opensource.wolfsonmicro.com>2012-12-11 12:39:30 +0900
commitdb760fbecd3d609098ef4121d7988ff2a5db15d1 (patch)
treeff4d9bc553848e796f0b099343d7f640acf4fbcb /include/linux/regmap.h
parent4d348e6e0a35cd1b40196a463f1159ae5d582770 (diff)
parent0d4529c534c1c664f25088eb5f5b4d7ce0ee2510 (diff)
Merge remote-tracking branch 'regmap/topic/lock' into regmap-next
Diffstat (limited to 'include/linux/regmap.h')
-rw-r--r--include/linux/regmap.h16
1 files changed, 15 insertions, 1 deletions
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 41e9e4e17657..fedf7ba74590 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -54,6 +54,9 @@ enum regmap_endian {
REGMAP_ENDIAN_NATIVE,
};
+typedef void (*regmap_lock)(void *);
+typedef void (*regmap_unlock)(void *);
+
/**
* Configuration for the register map of a device.
*
@@ -76,6 +79,12 @@ enum regmap_endian {
* @precious_reg: Optional callback returning true if the rgister
* should not be read outside of a call from the driver
* (eg, a clear on read interrupt status register).
+ * @lock: Optional lock callback (overrides regmap's default lock
+ * function, based on spinlock or mutex).
+ * @unlock: As above for unlocking.
+ * @lock_arg: this field is passed as the only argument of lock/unlock
+ * functions (ignored in case regular lock/unlock functions
+ * are not overridden).
*
* @max_register: Optional, specifies the maximum valid register index.
* @reg_defaults: Power on reset values for registers (for use with
@@ -117,6 +126,9 @@ struct regmap_config {
bool (*readable_reg)(struct device *dev, unsigned int reg);
bool (*volatile_reg)(struct device *dev, unsigned int reg);
bool (*precious_reg)(struct device *dev, unsigned int reg);
+ regmap_lock lock;
+ regmap_unlock unlock;
+ void *lock_arg;
unsigned int max_register;
const struct reg_default *reg_defaults;
@@ -186,7 +198,9 @@ typedef void (*regmap_hw_free_context)(void *context);
* Description of a hardware bus for the register map infrastructure.
*
* @fast_io: Register IO is fast. Use a spinlock instead of a mutex
- * to perform locking.
+ * to perform locking. This field is ignored if custom lock/unlock
+ * functions are used (see fields lock/unlock of
+ * struct regmap_config).
* @write: Write operation.
* @gather_write: Write operation with split register/value, return -ENOTSUPP
* if not implemented on a given device.