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-The I2C protocol knows about two kinds of device addresses: normal 7 bit
-addresses, and an extended set of 10 bit addresses. The sets of addresses
-do not intersect: the 7 bit address 0x10 is not the same as the 10 bit
-address 0x10 (though a single device could respond to both of them).
-I2C messages to and from 10-bit address devices have a different format.
-See the I2C specification for the details.
-The current 10 bit address support is minimal. It should work, however
-you can expect some problems along the way:
-* Not all bus drivers support 10-bit addresses. Some don't because the
- hardware doesn't support them (SMBus doesn't require 10-bit address
- support for example), some don't because nobody bothered adding the
- code (or it's there but not working properly.) Software implementation
- (i2c-algo-bit) is known to work.
-* Some optional features do not support 10-bit addresses. This is the
- case of automatic detection and instantiation of devices by their,
- drivers, for example.
-* Many user-space packages (for example i2c-tools) lack support for
- 10-bit addresses.
-Note that 10-bit address devices are still pretty rare, so the limitations
-listed above could stay for a long time, maybe even forever if nobody
-needs them to be fixed.