SDcard over SPI on iMX6SX

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SDcard over SPI on iMX6SX

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ambroiseaa
Contributor I

Hi,

I'm working on an iMX6 solo X (ref.: MCIMX6X1CVO08AB, version without GPU) and I need a sdcard over SPI, but it doesn't work (All SDIO ports are occupied).

In my DTS file :

DTS file

&ecspi4{

    fsl,spi-num-chipselects = <1>;

    pinctrl-names = "default";

    pinctrl-0 = <&pinctrl_spi4>;

    status = "okay";

    cs-gpios = <&gpio6 10 0>;

   

    mmc-slot@0 {

        #address-cells = <1>;

        #size-cells = <1>;

        compatible = "fsl,mpc8323rdb-mmc-slot", "mmc-spi-slot";

        reg = <0>;

        spi-max-frequency = <1000000>;

    };   

};

pinctrl_hog: hoggrp {

            fsl,pins = <

            MX6SX_PAD_KEY_COL0__GPIO2_IO_10         0x1b0b0 /*RST FEC1/ENET1*/

            MX6SX_PAD_KEY_COL2__GPIO2_IO_12         0x1b0b0 /*RST FEC2/ENET2*/

            MX6SX_PAD_SD2_DATA2__GPIO6_IO_10        0x80000000 /*SDcard SS for ecspi4*/

            >;

        };

pinctrl_spi4: spi4grp {

            fsl,pins = <

                MX6SX_PAD_SD2_CLK__ECSPI4_SCLK        0x100b1

                MX6SX_PAD_SD2_CMD__ECSPI4_MOSI        0x100b1

                MX6SX_PAD_SD2_DATA3__ECSPI4_MISO    0x100b1

            >;

        };

I also activated SPI supports and MMC/SD/SDIO card support in Kernel. Am I missing something ?

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818 Views
Pavel
NXP TechSupport
NXP TechSupport

The Device Tree is a data structure for describing hardware.

See the following pages:

http://www.freescale.com/infocenter/index.jsp?topic=%2Fqcs_hwdev_ug%2F4101309.html

http://xillybus.com/tutorials/device-tree-zynq-1

http://www.devicetree.org/Main_Page

https://en.wikipedia.org/wiki/Device_tree

The i.MC6 eSPI and qSPI controllers are not compatible to the MPC8323 SPI. You cannot use the following line:

“compatible = "fsl,mpc8323rdb-mmc-slot", "mmc-spi-slot";” in .dts file.

Look at attached file. This file is documentation from the MPC8313RDB LTIB Linux BSP:

http://www.freescale.com/products/power-architecture-processors/powerquicc-processors/powerquicc-ii-....

Use this BSP for developing driver for using the i.MC6 eSPI or qSPI for the SD/MMC card.


Have a great day,
Pavel

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ambroiseaa
Contributor I

Hi Pavel,

Thanks for your answer. I corrected my dts file and there was a HW problem too.

Now, i have a new problem :

When booting my kernel prints :

"mmc4: mmc_rescan_try_freq: trying to init card at 400000 Hz" every few seconds (it's always 400000 Hz).

Just before the first time this message appear, there is : "mmc_spi spi3.0: SD/MMC host mmc4, no WP, no poweroff, cd polling"

I read on the web that could be a spi mode problem. How can I change it ?

my new dts file :

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

&ecspi4{

    fsl,spi-num-chipselects = <1>;

    pinctrl-names = "default";

    pinctrl-0 = <&pinctrl_spi4>;

    cs-gpios = <&gpio6 8 0>;

    status = "okay";

   

    sdcard: mmc-slot@0 {

        #address-cells = <1>;

        #size-cells = <1>;

        compatible = "mmc-spi-slot";

        reg = <0>;

        spi-max-frequency = <5000000>;

        voltage-ranges = <3200 3400>;

        disable-wp;

        disable-cd;

    };

};

pinctrl_spi4: spi4grp {

            fsl,pins = <

                MX6SX_PAD_SD2_CLK__ECSPI4_SCLK        0x17071

                MX6SX_PAD_SD2_CMD__ECSPI4_MOSI        0x17071

                MX6SX_PAD_SD2_DATA3__ECSPI4_MISO    0x17071

                MX6SX_PAD_SD2_DATA0__GPIO6_IO_8        0x80000000

            >;

};

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

Thanks a lot for your help,

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cristiansicilia
Contributor III

did you solve it? Was required to develop a new driver?

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sidebranch
Contributor II

Did you solve this?

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483 Views
SicScar
Contributor II

Up

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