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iMX53QSB cspi spidev configuration

Question asked by Daniel Gonzalez on Aug 29, 2013
Latest reply on Jun 5, 2014 by Ivan Bornyakov


Hi

I am working on a project that uses the imx53qsb (LOCO) board.

I have been trying to configure the cspi port for using the spidev without any success.

I set already the kernel configuration:

Spi support --> Freescale MXC CSPI controller.

                   --> User Mode SPI device driver support.

And register the mxc spi driver in:

mx53_loco.c

 

 

static iomux_v3_cfg_t mx53_loco_pads[] = {

    /* CSPI */

MX53_PAD_DISP0_DAT0__CSPI_SCLK,

MX53_PAD_DISP0_DAT1__CSPI_MOSI,

MX53_PAD_DISP0_DAT2__CSPI_MISO,

MX53_PAD_DISP0_DAT3__CSPI_SS0,

MX53_PAD_DISP0_DAT4__CSPI_SS1,

MX53_PAD_DISP0_DAT5__CSPI_SS2,

MX53_PAD_DISP0_DAT6__CSPI_SS3,

...

...

}

 

 

static struct mxc_spi_master mxcspi3_data = {

.maxchipselect = 4,

.spi_version = 23,

};

 

 

static struct spi_board_info mxspi3_device[] __initdata = {

    {

     .modalias = "spidev",

     .max_speed_hz =10000000,   

     .bus_num = 3,

     .chip_select = 0,

     .mode = SPI_MODE_1,

    },

    {

     .modalias = "spidev",

     .max_speed_hz =10000000,   

     .bus_num = 3,

     .chip_select = 1,   

     .mode = SPI_MODE_1,

    },

    {

     .modalias = "spidev",

     .max_speed_hz = 10000000,  

     .bus_num = 3,

     .chip_select = 2,

     .mode = SPI_MODE_1,

    },

    {

     .modalias = "spidev",

     .max_speed_hz = 10000000,  

     .bus_num = 3,

     .chip_select = 3,

     .mode = SPI_MODE_1,

    },

};

 

static void __init mxc_board_init(void)

{

     ...

     ...

 

    mxc_register_device(&mxcspi3_device, &mxcspi3_data);

    spi_register_board_info(mxspi3_device, ARRAY_SIZE(mxspi3_device));

 

     ...

     ...

}

 

I am working with the yocto project using the meta-fsl-arm layer and the version of kernel used is 2.6.35.

I get the spidev registered in the /dev folder but I don't see any output when I run the spi_test.c included in the Linux Documentation for testing the spidev.

 

Any idea where the problem is?

 

Thanks.

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