powerpc: Integrated Flash controller device tree bindings

Integrated Flash Controller

Properties:

- name : Should be ifc

- compatible : should contain "fsl,ifc". The version of the integrated

               flash controller can be found in the IFC_REV register at

               offset zero.

- #address-cells : Should be either two or three.  The first cell is the

                   chipselect number, and the remaining cells are the

                   offset into the chipselect.

- #size-cells : Either one or two, depending on how large each chipselect

                can be.

- reg : Offset and length of the register set for the device

- interrupts : IFC has two interrupts. The first one is the "common"

               interrupt(CM_EVTER_STAT), and second is the NAND interrupt

               (NAND_EVTER_STAT).

- ranges : Each range corresponds to a single chipselect, and covers

           the entire access window as configured.

Child device nodes describe the devices connected to IFC such as NOR (e.g.

cfi-flash) and NAND (fsl,ifc-nand). There might be board specific devices

like FPGAs, CPLDs, etc.

Example:

	ifc@ffe1e000 {

		compatible = "fsl,ifc", "simple-bus";

		#address-cells = <2>;

		#size-cells = <1>;

		reg = <0x0 0xffe1e000 0 0x2000>;

		interrupts = <16 2 19 2>;

		/* NOR, NAND Flashes and CPLD on board */

		ranges = <0x0 0x0 0x0 0xee000000 0x02000000

			  0x1 0x0 0x0 0xffa00000 0x00010000

			  0x3 0x0 0x0 0xffb00000 0x00020000>;

		flash@0,0 {

			#address-cells = <1>;

			#size-cells = <1>;

			compatible = "cfi-flash";

			reg = <0x0 0x0 0x2000000>;

			bank-width = <2>;

			device-width = <1>;

			partition@0 {

				/* 32MB for user data */

				reg = <0x0 0x02000000>;

				label = "NOR Data";

			};

		};

		flash@1,0 {

			#address-cells = <1>;

			#size-cells = <1>;

			compatible = "fsl,ifc-nand";

			reg = <0x1 0x0 0x10000>;

			partition@0 {

				/* This location must not be altered  */

				/* 1MB for u-boot Bootloader Image */

				reg = <0x0 0x00100000>;

				label = "NAND U-Boot Image";

				read-only;

			};

		};

		cpld@3,0 {

			#address-cells = <1>;

			#size-cells = <1>;

			compatible = "fsl,p1010rdb-cpld";

			reg = <0x3 0x0 0x000001f>;

		};

	};