spi_register_board_info - register SPI devices for a given board
2. SYNOPSIS ▲
int spi_register_board_info(struct spi_board_info const * info , unsigned n );
3. ARGUMENTS ▲
array of chip descriptors
how many descriptors are provided
4. CONTEXT ▲
5. DESCRIPTION ▲
Board-specific early init code calls this (probably during arch_initcall) with segments of the SPI device table. Any device nodes are created later, after the relevant parent SPI controller (bus_num) is defined. We keep this table of devices forever, so that reloading a controller driver will not make Linux forget about these hard-wired devices.
Other code can also call this, e.g. a particular add-on board might provide SPI devices through its expansion connector, so code initializing that board would naturally declare its SPI devices.
The board info passed can safely be __initdata ... but be careful of any embedded pointers (platform_data, etc), theyAqre copied as-is.
6. COPYRIGHT ▲