Kernel-4.18.0-80.el8_fsl-boar

Freescale Reference Board Bindings

This document describes device tree bindings for various devices that
exist on some Freescale reference boards.

• Board Control and Status (BCSR)

Required properties:

• compatible : Should be “fsl,-bcsr”
• reg : Offset and length of the register set for the device

Example:

bcsr@f8000000 {
    compatible = "fsl,mpc8360mds-bcsr";
    reg = <f8000000 8000>;
};

• Freescale on-board FPGA

This is the memory-mapped registers for on board FPGA.

Required properties:

• compatible: should be a board-specific string followed by a string
  indicating the type of FPGA. Example:
  “fsl,-fpga”, “fsl,fpga-pixis”, or
  “fsl,-fpga”, “fsl,fpga-qixis”
• reg: should contain the address and the length of the FPGA register set.

Optional properties:

• interrupt-parent: should specify phandle for the interrupt controller.
• interrupts: should specify event (wakeup) IRQ.

Example (P1022DS):

 board-control@3,0 {
     compatible = "fsl,p1022ds-fpga", "fsl,fpga-ngpixis";
     reg = <3 0 0x30>;
     interrupt-parent = <&mpic>;
     interrupts = <8 8 0 0>;
 };

Example (LS2080A-RDB):

    cpld@3,0 {
            compatible = "fsl,ls2080ardb-fpga", "fsl,fpga-qixis";
            reg = <0x3 0 0x10000>;
    };

• Freescale BCSR GPIO banks

Some BCSR registers act as simple GPIO controllers, each such
register can be represented by the gpio-controller node.

Required properities:

• compatible : Should be “fsl,-bcsr-gpio”.
• reg : Should contain the address and the length of the GPIO bank
  register.
• #gpio-cells : Should be two. The first cell is the pin number and the
  second cell is used to specify optional parameters (currently unused).
• gpio-controller : Marks the port as GPIO controller.

Example:

bcsr@1,0 {
    #address-cells = <1>;
    #size-cells = <1>;
    compatible = "fsl,mpc8360mds-bcsr";
    reg = <1 0 0x8000>;
    ranges = <0 1 0 0x8000>;

    bcsr13: gpio-controller@d {
        #gpio-cells = <2>;
        compatible = "fsl,mpc8360mds-bcsr-gpio";
        reg = <0xd 1>;
        gpio-controller;
    };
};

• Freescale on-board FPGA connected on I2C bus

Some Freescale boards like BSC9132QDS have on board FPGA connected on
the i2c bus.

Required properties:

• compatible: Should be a board-specific string followed by a string
  indicating the type of FPGA. Example:
  “fsl,-fpga”, “fsl,fpga-qixis-i2c”
• reg: Should contain the address of the FPGA

Example:
fpga: fpga@66 {
compatible = “fsl,bsc9132qds-fpga”, “fsl,fpga-qixis-i2c”;
reg = <0x66>;
};

• Freescale on-board CPLD

Some Freescale boards like T1040RDB have an on board CPLD connected.

Required properties:

• compatible: Should be a board-specific string like “fsl,-cpld”
  Example:
  “fsl,t1040rdb-cpld”, “fsl,t1042rdb-cpld”, “fsl,t1042rdb_pi-cpld”
• reg: should describe CPLD registers

Example:
cpld@3,0 {
compatible = “fsl,t1040rdb-cpld”;
reg = <3 0 0x300>;
};