melta101 Posts - Answer Overflow

melta101

•Created by melta101 on 12/23/2024 in #📦-middleware-and-os

How to Configure DTS and Struct for SPI Controller Driver with Child Nodes in Zephyr?

Hello Guys, I am developing a SPI Controller Driver for TI processors for Zephyr, I have a doubt on how do i set the Dts to look like? ideally it should like this if we include soc.dtsi, board.dts, overlay.dts

&spi1 {
    compatible = "ti,omap-spi";
    reg = <0x48030000 0x1000>;
    interrupts = <25>;
    #address-cells = <1>;
    #size-cells = <0>;

    spi1_device0: spi-device@0 {
        reg = <0>;
        spi-max-frequency = <1000000>;
        spi-cs-delay = <5>;
        word_length = <8>
    };

    spi1_device1: spi-device@1 {
        reg = <1>;
        spi-max-frequency = <2000000>;
        spi-cs-delay = <10>;
        word_length = <32>
    };
};

As of now, I am getting the SPI controller to have 4 CS, no DMA, no slave mode how do i set my struct config to accomodate the above? it would be simple if there was no child nodes like the below

struct spi_omap_config {
    DEVICE_MMIO_NAMED_ROM(base);
    uint32_t irq;    
};

but with child nodes in the equation, i am so confused...

19 replies

Gaming

Programming