OMAP Control Module bindings

Control Module contains miscellaneous features under it based on SoC type.
Pincontrol is one common feature, and it has a specialized support
described in [1]. Typically some clock nodes are also under control module.
Syscon is used to share register level access to drivers external to
control module driver itself.

See [2] for documentation about clock/clockdomain nodes.

[1] Documentation/devicetree/bindings/pinctrl/pinctrl-single.yaml
[2] Documentation/devicetree/bindings/clock/ti/*

Required properties:
- compatible:	Must be one of:
		"ti,am3-scm"
		"ti,am4-scm"
		"ti,dm814-scrm"
		"ti,dm816-scrm"
		"ti,omap2-scm"
		"ti,omap3-scm"
		"ti,omap4-scm-core"
		"ti,omap4-scm-padconf-core"
		"ti,omap4-scm-wkup"
		"ti,omap4-scm-padconf-wkup"
		"ti,omap5-scm-core"
		"ti,omap5-scm-padconf-core"
		"ti,omap5-scm-wkup-pad-conf"
		"ti,dra7-scm-core"
- reg:		Contains Control Module register address range
		(base address and length)

Optional properties:
- clocks:	clocks for this module
- clockdomains:	clockdomains for this module

Examples:

scm: scm@2000 {
	compatible = "ti,omap3-scm", "simple-bus";
	reg = <0x2000 0x2000>;
	#address-cells = <1>;
	#size-cells = <1>;
	ranges = <0 0x2000 0x2000>;

	omap3_pmx_core: pinmux@30 {
		compatible = "ti,omap3-padconf",
			     "pinctrl-single";
		reg = <0x30 0x230>;
		#address-cells = <1>;
		#size-cells = <0>;
		#interrupt-cells = <1>;
		interrupt-controller;
		pinctrl-single,register-width = <16>;
		pinctrl-single,function-mask = <0xff1f>;
	};

	scm_conf: scm_conf@270 {
		compatible = "syscon";
		reg = <0x270 0x330>;
		#address-cells = <1>;
		#size-cells = <1>;

		scm_clocks: clocks {
			#address-cells = <1>;
			#size-cells = <0>;
		};
	};

	scm_clockdomains: clockdomains {
	};
}

&scm_clocks {
	mcbsp5_mux_fck: mcbsp5_mux_fck {
		#clock-cells = <0>;
		compatible = "ti,composite-mux-clock";
		clocks = <&core_96m_fck>, <&mcbsp_clks>;
		ti,bit-shift = <4>;
		reg = <0x02d8>;
	};
};