diff options
Diffstat (limited to 'include')
-rw-r--r-- | include/linux/i2c.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/i2c.h b/include/linux/i2c.h index 57d41b0abce2..7b40cda57a70 100644 --- a/include/linux/i2c.h +++ b/include/linux/i2c.h | |||
@@ -361,6 +361,24 @@ static inline void i2c_set_adapdata(struct i2c_adapter *dev, void *data) | |||
361 | dev_set_drvdata(&dev->dev, data); | 361 | dev_set_drvdata(&dev->dev, data); |
362 | } | 362 | } |
363 | 363 | ||
364 | /** | ||
365 | * i2c_lock_adapter - Prevent access to an I2C bus segment | ||
366 | * @adapter: Target I2C bus segment | ||
367 | */ | ||
368 | static inline void i2c_lock_adapter(struct i2c_adapter *adapter) | ||
369 | { | ||
370 | mutex_lock(&adapter->bus_lock); | ||
371 | } | ||
372 | |||
373 | /** | ||
374 | * i2c_unlock_adapter - Reauthorize access to an I2C bus segment | ||
375 | * @adapter: Target I2C bus segment | ||
376 | */ | ||
377 | static inline void i2c_unlock_adapter(struct i2c_adapter *adapter) | ||
378 | { | ||
379 | mutex_unlock(&adapter->bus_lock); | ||
380 | } | ||
381 | |||
364 | /*flags for the client struct: */ | 382 | /*flags for the client struct: */ |
365 | #define I2C_CLIENT_PEC 0x04 /* Use Packet Error Checking */ | 383 | #define I2C_CLIENT_PEC 0x04 /* Use Packet Error Checking */ |
366 | #define I2C_CLIENT_TEN 0x10 /* we have a ten bit chip address */ | 384 | #define I2C_CLIENT_TEN 0x10 /* we have a ten bit chip address */ |