topic Re: imx93 spi3 testing. in i.MX Processors

imx93 spi3 testing.

sbmd_1234 — Wed, 16 Oct 2024 10:05:23 GMT

Hi NXP team,

I have created the node and pin settings for the spi3 in dts but I am unable the see the spidev_test data tx/rx as shown in the logs I have connected the MOSI and MISO pins also for loopback but no rx data I am getting pls check :

dts :

&lpspi3 {
#address-cells = <1>;
#size-cells = <0>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_lpspi3>;
cs-gpios = <&gpio2 8 GPIO_ACTIVE_LOW>;
fsl,spi-num-chipselects = <1>;
status = "okay";

spidev0: spi@0 {
compatible = "rohm,dh2228fv";
spi-max-frequency = <1000000>;
reg = <0>; /* Chip select 0 */
};
};

pinctrl_lpspi3: lpspi3grp {
fsl,pins = <
MX93_PAD_GPIO_IO08__LPSPI3_PCS0 0x3fe
MX93_PAD_GPIO_IO08__GPIO2_IO8 0x3fe
MX93_PAD_GPIO_IO09__LPSPI3_SIN 0x3fe
MX93_PAD_GPIO_IO10__LPSPI3_SOUT 0x3fe
MX93_PAD_GPIO_IO11__LPSPI3_SCK 0x3fe
>;
};

spidev_test logs :

spidev_test -D /dev/spidev0.0 -v -p "hello"
spi mode: 0x0
bits per word: 8
max speed: 500000 Hz (500 kHz)
TX | 68 65 6C 6C 6F __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ |hello|
RX | FF FF FF FF FF __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ |.....|

spidev_test -D /dev/spidev0.0 -v
spi mode: 0x0
bits per word: 8
max speed: 500000 Hz (500 kHz)
TX | FF FF FF FF FF FF 40 00 00 00 00 95 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF F0 0D |......@.........................|
RX | FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF |................................|

please help me to resolve this.

thanks.

Re: imx93 spi3 testing.

sbmd_1234 — Fri, 18 Oct 2024 09:06:54 GMT

Hi,

Any suggestions on this I want to validate the spi interface please help in this.

Thanks.

Re: imx93 spi3 testing.

Manuel_Salas — Mon, 21 Oct 2024 18:08:13 GMT

Hello @sbmd_1234

I hope you are doing very well.

Please refer to the imx93-11x11-evk-lpspi.dts.

Then, you should be able to get it working:

Without connection between SIN and SOUT:

With connection between SIN and SOUT:

FYI: tested on imx93evk and 6.6.23 bsp

Best regards,

Salas.

Re: imx93 spi3 testing.

sbmd_1234 — Tue, 22 Oct 2024 05:53:48 GMT

HI @Manuel_Salas

Thanks for your support!

Do I need to add the lpspi3 node in imx93-11x11-evk.dts file, or can we work with the DTS files "imx93-11x11-evk-lpspi.dts and imx93-11x11-evk-lpspi-slave.dts" as the spi configuration is already done?

Also, I cannot see the /dev/spidev interface if I am not adding the node in imx93-11x11-evk.dts file. Please help in this what configurations actually I need to validate the spi.

Thanks.

Re: imx93 spi3 testing.

Manuel_Salas — Tue, 22 Oct 2024 15:21:50 GMT

Hello @sbmd_1234

You can use imx93-11x11-evk-lpspi.dts directly and then you will be able to use the lpspi interface.

Best regards,

Salas.