enable spi (mars board )

hamzadardour — Tue, 01 Jul 2014 08:41:46 GMT

Hi everyone,

I would like enable spi for user space, because I don't find spix.x in /dev.

I enter the command ( modprobe spidev ) and it works ( verefied with lsmod ).

I found in some forums that I have to change the code of the file ( board-mx6q_marsboard.c ) to add spi for user space, but I don't know the gpio that I can use for the Cselect , this is the part of the code that could enable the spi ,

( the code between starts is what I had added )

could you help me please ,

/* start

#define MX6Q_MARSBOARD_ECSPI1_CS0	IMX_GPIO_NR(2, 30)
#define MX6Q_MARSBOARD_ECSPI2_CS0	IMX_GPIO_NR(2, 27)
#define MX6Q_MARSBOARD_ECSPI3_CS0	IMX_GPIO_NR(, ) ( I don't know gpios number

static int mx6q_marsboard_spi0_cs[] = {

MX6Q_MARSBOARD_ECSPI1_CS0,

};

static const struct spi_imx_master mx6q_marsboard_spi0_data __initconst = {

.chipselect = mx6q_marsboard_spi0_cs,

.num_chipselect = ARRAY_SIZE(mx6q_marsboard_spi0_cs),

};

static int mx6q_marsboard_spi1_cs[] = {

MX6Q_MARSBOARD_ECSPI2_CS0,

};

static const struct spi_imx_master mx6q_marsboard_spi1_data __initconst = {

.chipselect = mx6q_marsboard_spi1_cs,

.num_chipselect = ARRAY_SIZE(mx6q_marsboard_spi1_cs),

};

//********************************** my code 1

static int mx6q_marsboard_spi2_cs[] = {

MX6Q_MARSBOARD_ECSPI3_CS0,

};

static const struct spi_imx_master mx6q_marsboard_spi2_data __initconst = {

.chipselect = mx6q_marsboard_spi2_cs,

.num_chipselect = ARRAY_SIZE(mx6q_marsboard_spi2_cs),

};

//***************************** end of my code 1

static struct spi_board_info imx6_marsboard_spi_devices[] __initdata = {

#if defined(CONFIG_MTD_M25P80)

{

.modalias = "m25p80",

.max_speed_hz = 20000000, /* max spi clock (SCK) speed in HZ */

.bus_num = 0,

.chip_select = 0,

.platform_data = &imx6_marsboard__spi_flash_data,

#endif

{

.modalias = "ads7846",

.bus_num = 1,

.chip_select = 0,

.max_speed_hz = 1500000,

.irq = gpio_to_irq(MX6Q_MARSBOARD_RES_TCH_INT),

.platform_data = &ads7846_config,

//***************** my code 2

{

.modalias = "spidev",

.max_speed_hz = 48000000, //48 Mbps

.bus_num = 2,

.chip_select = 0,

.mode = 0,

//****************** end of my code 2

};

*/ end

i.MX Processorsのトピックenable spi (mars board )

enable spi (mars board )