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| author | Peter Rosin <peda@axentia.se> | 2016-06-29 15:04:03 +0200 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2016-08-25 18:02:14 +0200 |
| commit | fb79e09a74faf39fbeee975e0ead442b7b7f6aac (patch) | |
| tree | 465679257bdac8b169b5e5d20b17aabbd9859aef /include | |
| parent | 00f0ea70d2b82b7d7afeb1bdedc9169eb8ea6675 (diff) | |
| download | linux-stable-fb79e09a74faf39fbeee975e0ead442b7b7f6aac.tar.gz linux-stable-fb79e09a74faf39fbeee975e0ead442b7b7f6aac.tar.bz2 linux-stable-fb79e09a74faf39fbeee975e0ead442b7b7f6aac.zip | |
i2c: add i2c_trylock_bus wrapper, use it
This unifies usage with i2c_lock_bus and i2c_unlock_bus, and paves the
way for the next patch which looks a bit saner with this preparatory
work taken care of beforehand.
Signed-off-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/i2c.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/i2c.h b/include/linux/i2c.h index fffdc270ca18..c1f60a345db7 100644 --- a/include/linux/i2c.h +++ b/include/linux/i2c.h @@ -601,6 +601,20 @@ i2c_lock_bus(struct i2c_adapter *adapter, unsigned int flags) } /** + * i2c_trylock_bus - Try to get exclusive access to an I2C bus segment + * @adapter: Target I2C bus segment + * @flags: I2C_LOCK_ROOT_ADAPTER tries to locks the root i2c adapter, + * I2C_LOCK_SEGMENT tries to lock only this branch in the adapter tree + * + * Return: true if the I2C bus segment is locked, false otherwise + */ +static inline int +i2c_trylock_bus(struct i2c_adapter *adapter, unsigned int flags) +{ + return adapter->trylock_bus(adapter, flags); +} + +/** * i2c_unlock_bus - Release exclusive access to an I2C bus segment * @adapter: Target I2C bus segment * @flags: I2C_LOCK_ROOT_ADAPTER unlocks the root i2c adapter, I2C_LOCK_SEGMENT |