topic Re: SDcard over SPI on iMX6SX in i.MX Processors

SDcard over SPI on iMX6SX

ambroiseaa — Mon, 28 Sep 2015 13:56:54 GMT

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 >; };

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 ?

Re: SDcard over SPI on iMX6SX

Pavel — Tue, 29 Sep 2015 05:56:43 GMT

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-pro-83xx/low-power-powerquicc-ii-pro-processor-with-ddr2-pci-1-gb-ethernet-security-usb:MPC8313E?fpsp=1&tab=Design_Tools_Tab.

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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Re: SDcard over SPI on iMX6SX

ambroiseaa — Tue, 29 Sep 2015 13:09:08 GMT

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,

Re: SDcard over SPI on iMX6SX

sidebranch — Fri, 07 Sep 2018 15:45:42 GMT

Did you solve this?

Re: SDcard over SPI on iMX6SX

SicScar — Mon, 27 Sep 2021 10:46:58 GMT

Re: SDcard over SPI on iMX6SX

cristiansicilia — Wed, 16 Mar 2022 05:50:27 GMT

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