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Original question:

J722SXH01EVM: Enabling SPI in PROCESSOR-SDK-LINUX-J722S

J722SXH01EVM: Enabling MCU_MCSPI0 in PROCESSOR-SDK-LINUX-J722S

Jin Lee
Intellectual 1952 points
Part Number: J722SXH01EVM

Tool/software:

Hi,

For my application, I need to enable MCU_MCSPI0 and MCU_SPI1 on the J722S.

I noticed that for MCU domain peripherals for other platforms, there is an *-mcu.dtsi associated with them (e.g. k3-am65-mcu.dtsi, k3-j721e-mcu-wakeup.dtsi, etc..).

My assumption is that the MCU_MCSPI0 device tree node should be similarly added, but there is no such file (k3-j722s-mcu.dtsi).

Where should I add the device tree node? Are there any other differences to consider when enabling main vs MCU peripherals?

Thank you,

Jin

  • +1
    TI__Guru**** 155270 points

    Hi Jin,

    This was an attempt to reuse similar code.

    So if you open: arch/arm64/boot/dts/ti/k3-j722s.dtsi

    k3-j722s.dtsi inlcudes k3-am62p5.dtsi which inturn include k3-am62p.dtsi

    if you check k3-am62p5.dtsi this has exactly what you are looking for:

    /* Now include peripherals for each bus segment */
    #include "k3-am62p-main.dtsi"
    #include "k3-am62p-mcu.dtsi"
    #include "k3-am62p-wakeup.dtsi"

    So you could include in the k3-am62p-mcu.dtsi

    - Keerthy

  • 0 in reply to Keerthy J
    TI__Intellectual 1952 points

    Understood, thank you.