1I2C_SMBUS_READ_I2C_B(9)     I2C and SMBus Subsystem    I2C_SMBUS_READ_I2C_B(9)
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NAME

6       i2c_smbus_read_i2c_block_data_or_emulated - read block or emulate
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SYNOPSIS

9       s32
10                                                     i2c_smbus_read_i2c_block_data_or_emulated(const struct i2c_client * client,
11                                                     u8 command, u8 length,
12                                                     u8 * values);
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ARGUMENTS

15       client
16           Handle to slave device
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18       command
19           Byte interpreted by slave
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21       length
22           Size of data block; SMBus allows at most I2C_SMBUS_BLOCK_MAX bytes
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24       values
25           Byte array into which data will be read; big enough to hold the
26           data returned by the slave. SMBus allows at most
27           I2C_SMBUS_BLOCK_MAX bytes.
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DESCRIPTION

30       This executes the SMBus “block read” protocol if supported by the
31       adapter. If block read is not supported, it emulates it using either
32       word or byte read protocols depending on availability.
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34       The addresses of the I2C slave device that are accessed with this
35       function must be mapped to a linear region, so that a block read will
36       have the same effect as a byte read. Before using this function you
37       must double-check if the I2C slave does support exchanging a block
38       transfer with a byte transfer.
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41Kernel Hackers Manual 3.10         June 2019           I2C_SMBUS_READ_I2C_B(9)
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