Documentation/i2c/smbus-protocol.rst

44 Addr  (7 bits)  I2C 7 bit address. Note that this can be expanded to
46 Comm  (8 bits)  Command byte, a data byte which often selects a register on
48 Data  (8 bits)  A plain data byte. DataLow and DataHigh represent the low and
50 Count (8 bits)  A data byte containing the length of a block operation.
117 byte. But this time, the data is a complete word (16 bits)::
149 This is the opposite of the Read Word operation. 16 bits
166 16 bits of data to it, and reads 16 bits of data in return::
207 SMBus Block Write - Block Read Process Call
210 SMBus Block Write - Block Read Process Call was introduced in
241   client->irq assigned to a Host Notify IRQ if no one else specified another.
251 PEC adds a CRC-8 error-checking byte to transfers using it, immediately
255 Address Resolution Protocol (ARP)
258 The Address Resolution Protocol was introduced in Revision 2.0 of
259 the specification. It is a higher-layer protocol which uses the