SPI and uClinux

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Ok, reading documentation in Linux kernel I find that if I want to use open() and write() function within my software I need to write a protocol driver or simply use spidev driver. I added in config.c the following code

static struct spi_board_info nios2_spi_devices = {
        .modalias = "spidev",
        .max_speed_hz = 173.3 * 1000,
        .bus_num = 1,
        .chip_select = 0,
        .irq = na_spi_irq,
        .mode = SPI_MODE_0,
};

and I did what is described in spidev documentation, but I am still not able to have spidev1.0 in /dev directory. Can anyone help me?

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You need to do three things

1. you need to add your spi device driver like altera_spi in config.c

2. you need to add spi_board_info, bus_num should match with step1

3. Make sure your spi device (altera_spi) probe did not returned error with unsupported mode

Point to note is spidev is not spi hardware driver, it is spi user level driver and need to be linked to actual driver with bus_num

I will post snippet of my code asap