[microblaze-uclinux] spi and spidev usage

["Bartsch Carsten" <cbartsch@xxxxxxxxxx>]

Hi to all,

I'm trying to use SPI. I added a 2nd SPI core to my FPGA.
The software-part is based on petalinux-mmu-v0.10.

The drivers spi and spidev can be build, the kernel says
xilinx_spi 0: at 0x83400000 mapped to 0xC8100000, irq=0
xilinx_spi 1: at 0x83500000 mapped to 0xC8120000, irq=1
and in the list of /proc/devices there are character devices 
123 xilinx_spi and 153 spidev.

Can I test to access these devices already?

The spidev documentation says to configure the SPI-slaves in the 
board initialization code using spi_register_board_info or 
defining tables of devices 
static struct spi_board_info spi_board_info[] __initdata = {...

Where can I do this?

The documentation told me to use udev or mdev to populate /dev
dynamically.
mdev is not available in the busybox config (maybe to old) and udev
cannot 
be build. I don't need dynamic configuration. 

Can I add the devices in the makefile of my platform instead?

Thanks for any help,
Carsten


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