IMX6 Using ECSPI1 master to communicate with VK3234 slave

[wenjingwang]

I configured the ECSPI1 channel by the follow modify:

--- a/arch/arm/mach-mx6/board-mx6dl_sabresd.h

+++ b/arch/arm/mach-mx6/board-mx6dl_sabresd.h

@@ -32,10 +32,28 @@ static iomux_v3_cfg_t mx6dl_sabresd_pads[] = {

        MX6DL_PAD_SD2_DAT0__AUDMUX_AUD4_RXD,

        MX6DL_PAD_SD2_DAT1__AUDMUX_AUD4_TXFS,

        MX6DL_PAD_SD2_DAT2__AUDMUX_AUD4_TXD,

-       /* CSPI */

+       /* ECSPI1 */

+       //WWJ changed for SPI1

+       MX6DL_PAD_EIM_D16__ECSPI1_SCLK,

+       MX6DL_PAD_EIM_D17__ECSPI1_MISO,

+       MX6DL_PAD_EIM_D18__ECSPI1_MOSI,

+       MX6DL_PAD_EIM_D19__GPIO_3_19,   /*CS1*/

+       MX6DL_PAD_EIM_D24__GPIO_3_24,   /*CS2*/

+       MX6DL_PAD_EIM_D25__GPIO_3_25,   /*CS3*/

+       MX6DL_PAD_GPIO_3__GPIO_1_3,             /*SPI_INT*/

+       //WWJ and end

--- a/arch/arm/mach-mx6/board-mx6q_sabresd.c

+++ b/arch/arm/mach-mx6/board-mx6q_sabresd.c

@@ -215,6 +215,12 @@

// Frank Lee #define SABRESD_ELAN_RST  IMX_GPIO_NR(3, 8)

// Frank Lee #define SABRESD_ELAN_INT  IMX_GPIO_NR(3, 28)

+//WWJ changed for SPI1

+#define VK3234_ECSPI1_CS0 IMX_GPIO_NR(3, 19)

+#define VK3234_ECSPI1_CS1 IMX_GPIO_NR(3, 24)

+#define VK3234_ECSPI1_CS2 IMX_GPIO_NR(3, 25)

+

+

--- a/arch/arm/mach-mx6/board-mx6q_sabresd.c

+++ b/arch/arm/mach-mx6/board-mx6q_sabresd.c

@@ -215,6 +215,12 @@

// Frank Lee #define SABRESD_ELAN_RST  IMX_GPIO_NR(3, 8)

// Frank Lee #define SABRESD_ELAN_INT  IMX_GPIO_NR(3, 28)

+//WWJ changed for SPI1

+#define VK3234_ECSPI1_CS0 IMX_GPIO_NR(3, 19)

+#define VK3234_ECSPI1_CS1 IMX_GPIO_NR(3, 24)

+#define VK3234_ECSPI1_CS2 IMX_GPIO_NR(3, 25)

+

+

static const struct spi_imx_master mx6q_sabresd_spi_data __initconst = {

@@ -375,6 +384,26 @@ static struct spi_board_info imx6_sabresd_spi_nor_device[] __initdata = {

                .platform_data = &imx6_sabresd__spi_flash_data,

        },

#endif

+       //WWJ changed for SPI1

+       /*

+       {

+                .modalias = "vk3234",

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

+                .bus_num = 1,

+                .chip_select = 0,

+                .platform_data = NULL,

+               .mode = SPI_MODE_0,

+        },*/

+

+       {

+                .modalias = "vk3234",

+                .max_speed_hz = 200000, /* max spi clock (SCK) speed in HZ */

+                .bus_num = 1,

+                .chip_select = 1,

+                .platform_data = NULL,

+               .mode = SPI_MODE_0,

+        },

+

};

+       imx6q_add_ecspi(1, &mx6q_sabresd_spi_data);

+       spi_device_init();

and when i using the SPI (CS1) to read/write the VK3234, CS1 is pulled down, but the SCLK is always hight( have no clk signal), has anyone can help me ?

[xiaoqianlin]

please send us the schematic for check.

[wenjingwang]

I have also changed the macro MX6DL_PAD_EIM_D16__ECSPI1_SCLK like this:

//WWJ changed for ISPI1

/*

#define MX6DL_PAD_EIM_D16__ECSPI1_SCLK                                                                            \

                IOMUX_PAD(0x0514, 0x0144, 1, 0x07D8, 2, MX6DL_ECSPI_PAD_CTRL)

*/

#define MX6DL_PAD_EIM_D16__ECSPI1_SCLK                                                                            \

              IOMUX_PAD(0x0514, 0x0144, 1, 0x07D8, 0 , MX6DL_ECSPI_PAD_CTRL)

[weidong_sun]

Hi wenjing,

     You are using ECSPI1, so bus_num should be 0, see following and try it again:

+       //WWJ changed for SPI1

+       /*

+       {

+                .modalias = "vk3234",

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

+                .bus_num = 0,

+                .chip_select = 0,

+                .platform_data = NULL,

+               .mode = SPI_MODE_0,

+        },*/

+

+       {

+                .modalias = "vk3234",

+                .max_speed_hz = 200000, /* max spi clock (SCK) speed in HZ */

+                .bus_num = 0,

+                .chip_select = 1,

+                .platform_data = NULL,

+               .mode = SPI_MODE_0,

+        },

Hope suggestion is useful for you !

-----------------------------

If my advice can help you resolve the issue, please help to close the post !

thanks!

-----------------------------

Regards,

Weidong

[wenjingwang · Accepted solution]

I changed the bus_num to 0 and imx6q_add_ecspi(0, &mx6q_sabresd_spi_data), the clk is appared:

       //WWJ changed for SPI1

+       /*

+       {

+                .modalias = "vk3234",

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

+                .bus_num = 1,

+                .chip_select = 0,

+                .platform_data = NULL,

+               .mode = SPI_MODE_0,

+        },*/

+

+       {

+                .modalias = "vk3234",

+                .max_speed_hz = 200000, /* max spi clock (SCK) speed in HZ */

+                .bus_num = 0,

+                .chip_select = 1,

+                .platform_data = NULL,

+               .mode = SPI_MODE_0,

+        },

+

};

+       imx6q_add_ecspi(0, &mx6q_sabresd_spi_data);