P2 pin configuration for spi nrf54l

[Agustin Perez]

I'm testing the nRF54L15 spi22 peripheral with the following pin assignment:

    spi22_default_alt: spi22_default_alt {

        group1 {

            psels = <NRF_PSEL(SPIM_SCK, 2, 6)>,

                <NRF_PSEL(SPIM_MISO, 2, 2)>,  

                <NRF_PSEL(SPIM_MOSI, 2, 4)>;  

        };

    };

    spi22_sleep_alt: spi22_sleep_alt {

        group1 {

            psels = <NRF_PSEL(SPIM_SCK, 2, 6)>,

                <NRF_PSEL(SPIM_MISO, 2, 2)>,  

                <NRF_PSEL(SPIM_MOSI, 2, 4)>;  

                low-power-enable;

        };

    };

&spi22 {

    status = "okay";

    pinctrl-0 = <&spi22_default_alt>;

    pinctrl-1 = <&spi22_sleep_alt>;

    pinctrl-names = "default", "sleep";

    nuvoton_spi_extern_gpio: nuvoton1@0 {

        compatible = "nuvoton,n55p242-spi-device";

        reg = <0>;

        spi-max-frequency = <2000000>;

    };

};

After the flash, when I analyze the spi signals, they are always down. I do the reworks in the development kit to connect those pins to gpio, and I can manage them as gpios, but they are not working as a spi bus.

Is that a hardware issue?

[Agustin Perez]

I noticed that the pin assignment is different from that in the datasheet. We are fabricating the PCBs, so utilizing the P2.04 as MOSI and the P2.02 as MISO is necessary. 

Is there a way to implement that? 

Thank you!

[Einar Thorsrud]

Hi,

I am unfortunately not able to see a supported configuration for SPIM using the pin combination you have described (see the pin assignemtns table for valid configurations). From what I see, you will need to rework your PCB.

(In the process you can also consider using another SPIM instance, but in that case, note that the instances are shared with other peripherals like UART, and the same instance cannot be used for different purpoces, see Instantiation).