FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/powerpc/fsl/mpc5121-psc.txt

     MPC5121 PSC Device Tree Bindings
     
     PSC in UART mode
     ----------------
     
     For PSC in UART mode the needed PSC serial devices
     are specified by fsl,mpc5121-psc-uart nodes in the
     fsl,mpc5121-immr SoC node. Additionally the PSC FIFO
     Controller node fsl,mpc5121-psc-fifo is required there:
    
    fsl,mpc512x-psc-uart nodes
    --------------------------
    
    Required properties :
     - compatible : Should contain "fsl,<soc>-psc-uart" and "fsl,<soc>-psc"
       Supported <soc>s: mpc5121, mpc5125
     - reg : Offset and length of the register set for the PSC device
     - interrupts : <a b> where a is the interrupt number of the
       PSC FIFO Controller and b is a field that represents an
       encoding of the sense and level information for the interrupt.
    
    Recommended properties :
     - fsl,rx-fifo-size : the size of the RX fifo slice (a multiple of 4)
     - fsl,tx-fifo-size : the size of the TX fifo slice (a multiple of 4)
    
    PSC in SPI mode
    ---------------
    
    Similar to the UART mode a PSC can be operated in SPI mode. The compatible used
    for that is fsl,mpc5121-psc-spi. It requires a fsl,mpc5121-psc-fifo as well.
    The required and recommended properties are identical to the
    fsl,mpc5121-psc-uart nodes, just use spi instead of uart in the compatible
    string.
    
    fsl,mpc512x-psc-fifo node
    -------------------------
    
    Required properties :
     - compatible : Should be "fsl,<soc>-psc-fifo"
       Supported <soc>s: mpc5121, mpc5125
     - reg : Offset and length of the register set for the PSC
             FIFO Controller
     - interrupts : <a b> where a is the interrupt number of the
       PSC FIFO Controller and b is a field that represents an
       encoding of the sense and level information for the interrupt.
    
    Recommended properties :
     - clocks : specifies the clock needed to operate the fifo controller
     - clock-names : name(s) for the clock(s) listed in clocks
    
    Example for a board using PSC0 and PSC1 devices in serial mode:
    
    serial@11000 {
            compatible = "fsl,mpc5121-psc-uart", "fsl,mpc5121-psc";
            cell-index = <0>;
            reg = <0x11000 0x100>;
            interrupts = <40 0x8>;
            interrupt-parent = < &ipic >;
            fsl,rx-fifo-size = <16>;
            fsl,tx-fifo-size = <16>;
    };
    
    serial@11100 {
            compatible = "fsl,mpc5121-psc-uart", "fsl,mpc5121-psc";
            cell-index = <1>;
            reg = <0x11100 0x100>;
            interrupts = <40 0x8>;
            interrupt-parent = < &ipic >;
            fsl,rx-fifo-size = <16>;
            fsl,tx-fifo-size = <16>;
    };
    
    pscfifo@11f00 {
            compatible = "fsl,mpc5121-psc-fifo";
            reg = <0x11f00 0x100>;
            interrupts = <40 0x8>;
            interrupt-parent = < &ipic >;
    };

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