K 10
svn:author
V 3
ian
K 8
svn:date
V 27
2017-09-11T17:01:26.863642Z
K 7
svn:log
V 587
MFC r321583, r321584:

Add a pair of convenience routines for doing simple "register" read/writes
on i2c devices, where the "register" can be any length.

Add support for tracking nested calls to iicbus_request/release_bus().
Usually it is sufficient to use iicbus_transfer_excl(), or one of the
higher-level convenience functions that use it, to reserve the bus for the
duration of each register access.  Occasionally it is important that a
series of accesses or read-modify-write operations must be done without any
other intervening access to the device, to prevent corrupting state.

END