1I2C_SMBUS_READ_BLOCK(9)     I2C and SMBus Subsystem    I2C_SMBUS_READ_BLOCK(9)
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NAME

6       i2c_smbus_read_block_data - SMBus “block read” protocol
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SYNOPSIS

9       s32 i2c_smbus_read_block_data(const struct i2c_client * client,
10                                     u8 command, u8 * values);
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ARGUMENTS

13       client
14           Handle to slave device
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16       command
17           Byte interpreted by slave
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19       values
20           Byte array into which data will be read; big enough to hold the
21           data returned by the slave. SMBus allows at most 32 bytes.
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DESCRIPTION

24       This executes the SMBus “block read” protocol, returning negative errno
25       else the number of data bytes in the slave's response.
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27       Note that using this function requires that the client's adapter
28       support the I2C_FUNC_SMBUS_READ_BLOCK_DATA functionality. Not all
29       adapter drivers support this; its emulation through I2C messaging
30       relies on a specific mechanism (I2C_M_RECV_LEN) which may not be
31       implemented.
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34Kernel Hackers Manual 3.10         June 2019           I2C_SMBUS_READ_BLOCK(9)
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