FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/spi/atmel-quadspi.txt

     * Atmel Quad Serial Peripheral Interface (QSPI)
     
     Required properties:
     - compatible:     Should be one of the following:
                       - "atmel,sama5d2-qspi"
                       - "microchip,sam9x60-qspi"
     - reg:            Should contain the locations and lengths of the base registers
                       and the mapped memory.
     - reg-names:      Should contain the resource reg names:
                      - qspi_base: configuration register address space
                      - qspi_mmap: memory mapped address space
    - interrupts:     Should contain the interrupt for the device.
    - clocks:         Should reference the peripheral clock and the QSPI system
                      clock if available.
    - clock-names:    Should contain "pclk" for the peripheral clock and "qspick"
                      for the system clock when available.
    - #address-cells: Should be <1>.
    - #size-cells:    Should be <0>.
    
    Example:
    
    spi@f0020000 {
            compatible = "atmel,sama5d2-qspi";
            reg = <0xf0020000 0x100>, <0xd0000000 0x8000000>;
            reg-names = "qspi_base", "qspi_mmap";
            interrupts = <52 IRQ_TYPE_LEVEL_HIGH 7>;
            clocks = <&pmc PMC_TYPE_PERIPHERAL 52>;
            clock-names = "pclk";
            #address-cells = <1>;
            #size-cells = <0>;
            pinctrl-names = "default";
            pinctrl-0 = <&pinctrl_spi0_default>;
    
            m25p80@0 {
                    ...
            };
    };

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