FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/mtd/fsl-upm-nand.txt

     Freescale Localbus UPM programmed to work with NAND flash
     
     Required properties:
     - compatible : "fsl,upm-nand".
     - reg : should specify localbus chip select and size used for the chip.
     - fsl,upm-addr-offset : UPM pattern offset for the address latch.
     - fsl,upm-cmd-offset : UPM pattern offset for the command latch.
     
     Optional properties:
    - fsl,upm-addr-line-cs-offsets : address offsets for multi-chip support.
            The corresponding address lines are used to select the chip.
    - gpios : may specify optional GPIOs connected to the Ready-Not-Busy pins
            (R/B#). For multi-chip devices, "n" GPIO definitions are required
            according to the number of chips.
    
    Deprecated properties:
    - fsl,upm-wait-flags : add chip-dependent short delays after running the
            UPM pattern (0x1), after writing a data byte (0x2) or after
            writing out a buffer (0x4).
    - chip-delay : chip dependent delay for transferring data from array to
            read registers (tR). Required if property "gpios" is not used
            (R/B# pins not connected).
    
    Each flash chip described may optionally contain additional sub-nodes
    describing partitions of the address space. See partition.txt for more
    detail.
    
    Examples:
    
    upm@1,0 {
            compatible = "fsl,upm-nand";
            reg = <1 0 1>;
            fsl,upm-addr-offset = <16>;
            fsl,upm-cmd-offset = <8>;
            gpios = <&qe_pio_e 18 0>;
    
            flash {
                    #address-cells = <1>;
                    #size-cells = <1>;
                    compatible = "...";
    
                    partition@0 {
                            ...
                    };
            };
    };
    
    upm@3,0 {
            #address-cells = <0>;
            #size-cells = <0>;
            compatible = "tqc,tqm8548-upm-nand", "fsl,upm-nand";
            reg = <3 0x0 0x800>;
            fsl,upm-addr-offset = <0x10>;
            fsl,upm-cmd-offset = <0x08>;
            /* Multi-chip NAND device */
            fsl,upm-addr-line-cs-offsets = <0x0 0x200>;
    
            nand@0 {
                    #address-cells = <1>;
                    #size-cells = <1>;
    
                    partition@0 {
                                label = "fs";
                                reg = <0x00000000 0x10000000>;
                    };
            };
    };

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