i.MX Processorsのトピックimx93-spi

imx93-spi

bora — Tue, 08 Apr 2025 07:20:41 GMT

I'm working with a custom i.MX93 board and trying to bring up SPI. I’ve added the necessary configuration to the device tree, but I’m not sure if it’s correct — the SPI doesn’t seem to work as expected.

Could someone help me check if my device tree setup is right or guide me on how to properly enable SPI on this board?

&lpspi2 {
fsl,spi-num-chipselects = <1>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_ecspi2>;
cs-gpios = <&gpio1 11 GPIO_ACTIVE_LOW>;
dmas = <0>;
dma-names = <0>;
status = "okay";

ethernet@0 {
compatible = "adi,adin2111";

/* SPI CS number */
reg = <0>;

/* will need 23 MHz for 10 Mbps, lower speeds will result in lower bandwidth */
spi-max-frequency = <10000000>;

/* optional, will check all control read/writes over SPI */
adi,spi-crc;

#address-cells = <1>;
#size-cells = <0>;

/* an IRQ is required, INT_N pin is configured to signal RX/TX frames */
interrupt-parent = <&gpio1>;
interrupts = <18 IRQ_TYPE_LEVEL_LOW>;

/* This is the host MAC address, by default ADIN2111 will also accept broadcast frames */
mac-address = [ CA 2F B7 10 23 63 ];

phy@0 {
compatible = "ethernet-phy-id0283.bc91";
phy-10base-t1l-2.4vpp = <1>;
reg = <0x0>;
};
};

Re: imx93-spi

Zhiming_Liu — Wed, 09 Apr 2025 02:08:09 GMT

Hello,

Please delete dma nodes.

dmas = <0>; dma-names = <0>;

Then try to comment adi,spi-crc; to check if the ID can be read.

Best Regards,
Zhiming

Re: imx93-spi

bora — Thu, 10 Apr 2025 08:03:58 GMT

I tried but didnt work I cant still read ID.

Re: imx93-spi

Zhiming_Liu — Mon, 14 Apr 2025 01:47:24 GMT

Hello,

Can you check the exact behavior from the oscilloscope waveform?

Best Regards,
Zhiming

Re: imx93-spi

bora — Tue, 15 Apr 2025 12:00:23 GMT

I checked and the clock voltage is too high. I forgot to say also I use lpspi1 not 2. I corrected in the device tree.

Re: imx93-spi

Zhiming_Liu — Wed, 16 Apr 2025 07:12:33 GMT

Hello,

What does two high mean here? slave device needs 1v8, but it's 3V3?

Best Regards,
Zhiming

Re: imx93-spi

bora — Wed, 16 Apr 2025 12:23:32 GMT

I use ADIN2111. VDDIO is 3,3 V and wenn I measure CS pin (G21) I see more than 3,3V (when I send message via spidev_test).

Re: imx93-spi

Zhiming_Liu — Fri, 18 Apr 2025 06:17:11 GMT

Hello,

So this is the result of an unusual hardware design?

Best Regards,
Zhiming

Re: imx93-spi

bora — Tue, 22 Apr 2025 09:51:36 GMT

I checked and with spidev_test, I see the clock when I sent a message, but I dont see ADIN2111.