* Clock bindings for Freescale i.MX7ULP

i.MX7ULP Clock functions are under joint control of the System
Clock Generation (SCG) modules, Peripheral Clock Control (PCC)
modules, and Core Mode Controller (CMC)1 blocks

The clocking scheme provides clear separation between M4 domain
and A7 domain. Except for a few clock sources shared between two
domains, such as the System Oscillator clock, the Slow IRC (SIRC),
and and the Fast IRC clock (FIRCLK), clock sources and clock
management are separated and contained within each domain.

M4 clock management consists of SCG0, PCC0, PCC1, and CMC0 modules.
A7 clock management consists of SCG1, PCC2, PCC3, and CMC1 modules.

Note: this binding doc is only for A7 clock domain.

Required properties:

- compatible:	Should be "fsl,imx7ulp-scg0" or "fsl,imx7ulp-scg1".
- reg : 	Should contain registers location and length.
- #clock-cells:	Should be <1>.
- clocks:	Should contain the fixed input clocks.
- clock-name:   Should contain the following clock names:"cm4_rosc",
		"cm4_sosc", "cm4_sirc", "cm4_firc" for scg0.
Or
		Should contain the following clock names:"rsoc", "sosc",
		"sirc", "firc", "upll", "mpll" for scg1.

The clock consumer should specify the desired clock by having the clock
ID in its "clocks" phandle cell.
See include/dt-bindings/clock/imx7ulp-clock.h
for the full list of i.MX7ULP clock IDs.

Examples:

#include <dt-bindings/clock/imx7ulp-clock.h>

clks: scg1@403e0000 {
	compatible = "fsl,imx7ulp-clock";
	reg = <0x403e0000 0x10000>;
	clocks = <&rsoc>, <&sosc>, <&sirc>,
		 <&firc>, <&upll>, <&mpll>;
	clock-names = "rsoc", "sosc", "sirc",
		      "firc", "upll", "mpll";
	#clock-cells = <1>;
};

usdhc1: usdhc@40380000 {
	compatible = "fsl,imx7ulp-usdhc";
	reg = <0x40380000 0x10000>;
	interrupts = <GIC_SPI 43 IRQ_TYPE_LEVEL_HIGH>;
	clocks = <&clks IMX7ULP_CLK_NIC1_BUS_DIV>,
		 <&clks IMX7ULP_CLK_NIC1_DIV>,
		 <&clks IMX7ULP_CLK_USDHC1>;
	clock-names ="ipg", "ahb", "per";
	bus-width = <4>;
	status = "disabled";
};