dt-bindings: mtd: Add bindings for TI's AM654 HyperBus memory controller

Bindings for HyperBus Memory Controller (HBMC) on TI's K3 family of SoCs

Required properties:

- compatible : "ti,am654-hbmc" for AM654 SoC

- reg : Two entries:

	First entry pointed to the register space of HBMC controller

	Second entry pointing to the memory map region dedicated for

	MMIO access to attached flash devices

- ranges : Address translation from offset within CS to allocated MMIO

	   space in SoC

Optional properties:

- mux-controls : phandle to the multiplexer that controls selection of

		 HBMC vs OSPI inside Flash SubSystem (FSS). Default is OSPI,

		 if property is absent.

		 See Documentation/devicetree/bindings/mux/reg-mux.txt

		 for mmio-mux binding details

Example:

	system-controller@47000000 {

		compatible = "syscon", "simple-mfd";

		reg = <0x0 0x47000000 0x0 0x100>;

		#address-cells = <2>;

		#size-cells = <2>;

		ranges;

		hbmc_mux: multiplexer {

			compatible = "mmio-mux";

			#mux-control-cells = <1>;

			mux-reg-masks = <0x4 0x2>; /* 0: reg 0x4, bit 1 */

		};

	};

	hbmc: hyperbus@47034000 {

		compatible = "ti,am654-hbmc";

		reg = <0x0 0x47034000 0x0 0x100>,

			<0x5 0x00000000 0x1 0x0000000>;

		power-domains = <&k3_pds 55>;

		#address-cells = <2>;

		#size-cells = <1>;

		ranges = <0x0 0x0 0x5 0x00000000 0x4000000>, /* CS0 - 64MB */

			 <0x1 0x0 0x5 0x04000000 0x4000000>; /* CS1 - 64MB */

		mux-controls = <&hbmc_mux 0>;

		/* Slave flash node */

		flash@0,0 {

			compatible = "cypress,hyperflash", "cfi-flash";

			reg = <0x0 0x0 0x4000000>;

		};

	};

F:	drivers/mtd/hyperbus/

F:	include/linux/mtd/hyperbus.h

F:	Documentation/devicetree/bindings/mtd/cypress,hyperflash.txt

F:	Documentation/devicetree/bindings/mtd/ti,am654-hbmc.txt

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L:	linuxppc-dev@lists.ozlabs.org