---
name: "i2c_register_board_info"
section: "9"
platform: "linux"
package: "linux-manual-3.16"
version: "3.16.56-1+deb8u1"
release: "Debian 8 (Jessie)"
platforms: ["linux"]
url: "https://new.carta.tech/i2c_register_board_info"
---

# i2c\_register\_board\_info(9)

statically declare I2C devices

## NAME

i2c\_register\_board\_info - statically declare I2C devices

## SYNOPSIS

**int i2c\_register\_board\_info(int** *busnum***, struct i2c\_board\_info const \*** *info***, unsigned** *len***);**

## ARGUMENTS

*busnum*

identifies the bus to which these devices belong

*info*

vector of i2c device descriptors

*len*

how many descriptors in the vector; may be zero to reserve the specified bus number.

## DESCRIPTION

Systems using the Linux I2C driver stack can declare tables of board info while they initialize. This should be done in board-specific init code near **arch\_initcall** time, or equivalent, before any I2C adapter driver is registered. For example, mainboard init code could define several devices, as could the init code for each daughtercard in a board stack.

The I2C devices will be created later, after the adapter for the relevant bus has been registered. After that moment, standard driver model tools are used to bind “new style” I2C drivers to the devices. The bus number for any device declared using this routine is not available for dynamic allocation.

The board info passed can safely be \_\_initdata, but be careful of embedded pointers (for platform\_data, functions, etc) since that won't be copied.

## COPYRIGHT