Depends

This driver depends of entrance like this:

static struct spi_board_info spi_devices[] = {
	{
		.modalias = "nrf24le1",
		.chip_select = 0,
		.max_speed_hz = 4500*1000,
		.bus_num = 1,
	},
};

at91_add_device_spi(spi_devices, ARRAY_SIZE(spi_devices));

at board definition file, who normaly stay in:

arch/arm/mach-at91

Build

KERNELDIR=<path_to_your_kernel> make

Doc

• For documentacion about nrf24le1 look nordic oficial web site: http://www.nordicsemi.com/eng/Products/2.4GHz-RF/nRF24LE1
• Useful tools: http://www.glomationinc.com/support.html