Issue with QSPI Slave Select Line Not Going Low on i.MX8DXL QSPI0A Interface When Communicating with

[Pooja_shetty]

We conneced FPGA QSPI slave to iMXDXL QSPI0A

We have added QSPI configuration in device-tree as below
pinctrl_qspi: qspigrp {
                        fsl,pins = <
                                IMX8DXL_QSPI0A_DATA0_LSIO_QSPI0A_DATA0          0x06000021
                                IMX8DXL_QSPI0A_DATA1_LSIO_QSPI0A_DATA1          0x06000021
                                IMX8DXL_QSPI0A_DATA2_LSIO_QSPI0A_DATA2          0x06000021
                                IMX8DXL_QSPI0A_DATA3_LSIO_QSPI0A_DATA3          0x06000021
                                IMX8DXL_QSPI0A_SS0_B_LSIO_QSPI0A_SS0_B          0x06000021
                                IMX8DXL_QSPI0A_SCLK_LSIO_QSPI0A_SCLK            0x06000021
>;
                };

&flexspi0 {
        pinctrl-names = "default";
        pinctrl-0 = <&pinctrl_qspi>;
        nxp,fspi-dll-slvdly = <4>;
        status = "okay";
        spidev1: spi@0 {
                reg = <0>;
                compatible = "rohm,dh2228fv";
                spi-max-frequency = <30000000>;
                status = "okay";
        };
};

We are running below command for data transfer and facing errors

spidev_test -D /dev/spidev0.0 -v -s 10000000 -p -4 "hello"
spi mode: 0x0[  371.585590] kauditd_printk_skb: 1 callbacks suppressed

bits per word: 8
max speed: 10000000 Hz (10000 kHz)
can't sen[  371.585606] audit: type=1701 audit(1677837576.268:23): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=496 comm="spidev_test" exe="/usr/bin/spidev_test" sig=6 res=1
d spi message: Unknown error 524
Aborted

We observed  in CRO like the Slave select line is not going to low.

Can you please provide the solution for this

[Alejandro_Salas]

Hello @Pooja_shetty 

I hope you are doing well.

Could you please try with change the default SS signal with any other GPIO?

Also, please change the driver to spidev, this as example:

&flexspi0 {
    pinctrl-names = "default";
    pinctrl-0 = <&pinctrl_qspi>;
    nxp,fspi-dll-slvdly = <4>;
    status = "okay";
    spidev1: spi@0 {
        reg = <0>;
        compatible = "spidev";
        spi-max-frequency = <30000000>;
        cs-gpios = <&gpio1 25 0>;  // Select here your custom GPIO
        status = "okay";
    };
};

I hope this can helps to your issue.

Best regards,

Salas.

[Pooja_shetty]

Hello @Alejandro_Salas 

If i give compatible=spidev, i am not able to get spidev0.0 node(ls /dev/spidedev0.0).

Thanks & Regards,

Poojashree shetty.

[Alejandro_Salas]

Hello,

Ok, please set again the compatible = "rohm,dh2228fv"; and try with the other modifications.

Best regards,

Salas.

[Pooja_shetty]

Hello,

We have tried other modifications as well but still facing the same issue. We have one question: can the spidev driver be used for a QSPI slave?

Thanks & Regards,

Pooja