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| author | David Miller <davem@davemloft.net> | 2008-10-22 20:21:30 +0200 |
|---|---|---|
| committer | Jean Delvare <khali@linux-fr.org> | 2008-10-22 20:21:30 +0200 |
| commit | 30091404af5a7cd515e7b565df76932e295d8f6f (patch) | |
| tree | 6ce6ecb5707aca55aff260ff3a1ce8a3453be3de /include/linux/i2c-algo-pcf.h | |
| parent | 08e5338d119daeb3c7746fa80fa916b8d3d48e89 (diff) | |
| download | linux-30091404af5a7cd515e7b565df76932e295d8f6f.tar.gz linux-30091404af5a7cd515e7b565df76932e295d8f6f.tar.bz2 linux-30091404af5a7cd515e7b565df76932e295d8f6f.zip | |
i2c-algo-pcf: Add adapter hooks around xfer begin and end
Some I2C bus implementations need to synchronize with external
entities, such as system firmware, which might also be programming the
same I2C bus.
In order to facilitate this add ->xfer_begin() and ->xfer_end() hooks
which are invoked around pcf_xfer().
[JD: Make these hooks optional.]
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'include/linux/i2c-algo-pcf.h')
| -rw-r--r-- | include/linux/i2c-algo-pcf.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/i2c-algo-pcf.h b/include/linux/i2c-algo-pcf.h index 5de8a319bf14..0f91a957a690 100644 --- a/include/linux/i2c-algo-pcf.h +++ b/include/linux/i2c-algo-pcf.h @@ -33,6 +33,9 @@ struct i2c_algo_pcf_data { int (*getclock) (void *data); void (*waitforpin) (void *data); + void (*xfer_begin) (void *data); + void (*xfer_end) (void *data); + /* Multi-master lost arbitration back-off delay (msecs) * This should be set by the bus adapter or knowledgable client * if bus is multi-mastered, else zero |