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I2C_NEW_SECONDARY_DE(9) I2C and SMBus Subsystem I2C_NEW_SECONDARY_DE(9)

NAME

i2c_new_secondary_device - Helper to get the instantiated secondary address and create the associated device

SYNOPSIS

struct i2c_client * i2c_new_secondary_device(struct i2c_client * client, const char * name, u16 default_addr);

ARGUMENTS

client

Handle to the primary client

name

Handle to specify which secondary address to get

default_addr

Used as a fallback if no secondary address was specified

CONTEXT

can sleep

DESCRIPTION

I2C clients can be composed of multiple I2C slaves bound together in a single component. The I2C client driver then binds to the master I2C slave and needs to create I2C dummy clients to communicate with all the other slaves.

This function creates and returns an I2C dummy client whose I2C address is retrieved from the platform firmware based on the given slave name. If no address is specified by the firmware default_addr is used.

On DT-based platforms the address is retrieved from the “reg” property entry cell whose “reg-names” value matches the slave name.

This returns the new i2c client, which should be saved for later use with i2c_unregister_device; or NULL to indicate an error.

COPYRIGHT

June 2024 Kernel Hackers Manual 3.10