Documentation/i2c/functionality.rst

2 I2C/SMBus Functionality
8 Because not every I2C or SMBus adapter implements everything in the
22   I2C_FUNC_I2C                    Plain i2c-level commands (Pure SMBus
29   I2C_FUNC_SMBUS_QUICK            Handles the SMBus write_quick command
30   I2C_FUNC_SMBUS_READ_BYTE        Handles the SMBus read_byte command
31   I2C_FUNC_SMBUS_WRITE_BYTE       Handles the SMBus write_byte command
32   I2C_FUNC_SMBUS_READ_BYTE_DATA   Handles the SMBus read_byte_data command
33   I2C_FUNC_SMBUS_WRITE_BYTE_DATA  Handles the SMBus write_byte_data command
34   I2C_FUNC_SMBUS_READ_WORD_DATA   Handles the SMBus read_word_data command
35   I2C_FUNC_SMBUS_WRITE_WORD_DATA  Handles the SMBus write_byte_data command
36   I2C_FUNC_SMBUS_PROC_CALL        Handles the SMBus process_call command
37   I2C_FUNC_SMBUS_READ_BLOCK_DATA  Handles the SMBus read_block_data command
38   I2C_FUNC_SMBUS_WRITE_BLOCK_DATA Handles the SMBus write_block_data command
39   I2C_FUNC_SMBUS_READ_I2C_BLOCK   Handles the SMBus read_i2c_block_data command
40   I2C_FUNC_SMBUS_WRITE_I2C_BLOCK  Handles the SMBus write_i2c_block_data command
46   I2C_FUNC_SMBUS_BYTE             Handles the SMBus read_byte
48   I2C_FUNC_SMBUS_BYTE_DATA        Handles the SMBus read_byte_data
50   I2C_FUNC_SMBUS_WORD_DATA        Handles the SMBus read_word_data
52   I2C_FUNC_SMBUS_BLOCK_DATA       Handles the SMBus read_block_data
54   I2C_FUNC_SMBUS_I2C_BLOCK        Handles the SMBus read_i2c_block_data
56   I2C_FUNC_SMBUS_EMUL             Handles all SMBus commands that can be
72 A typical SMBus-only adapter would list all the SMBus transactions it
90 I2C_FUNC_SMBUS_EMUL includes all the SMBus transactions (with the
93 to let the client drivers check for the support of SMBus functions
116 Here, the lm75 driver checks if the adapter can do both SMBus byte data
117 and SMBus word data transactions. If not, then the driver won't work on
129 i2c-core will transparently implement SMBus transactions on top of I2C
152 	/* Oops, the needed functionality (SMBus write_quick function) is
156   /* Now it is safe to use the SMBus write_quick command */