Documentation/i2c/ten-bit-addresses
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以下为正文
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.
I2C协议有两种设备地址：正常的7位地址，和一组扩展的10位地址。
地址集不相交：7位地址0x10和10位的地址0x10不一样（虽然一个单一的设备可以满足两个）
I2C消息以及来自10位地址的设备具有不同的格式。
详见I2C
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.
目前的10位地址支持最小的，它应该运作，但是你可以预料一些问题：
*不支持10位地址总线驱动。一些是因为硬件不支持（SMBus并不需要10位地址支持），
一些是因为没有人添加代码（或它存在，但不能正常工作）软件实现（i2c-algo-bit）是已知的工作。
*一些可选功能不支持10位地址。这是自动检测和实例化的设备的情况下，例如，驱动程序。
*许多用户空间的包（例如I2C工具）缺乏10位地址支持。
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.
请注意，10位地址的设备仍然相当罕见，因此上述限制可能会停留一段时间，甚至永远如果没人需要被固定。