clocksource: ftm: Add FlexTimer Module (FTM) Timer devicetree Documentation

Freescale FlexTimer Module (FTM) Timer

Required properties:

- compatible : should be "fsl,ftm-timer"

- reg : Specifies base physical address and size of the register sets for the

  clock event device and clock source device.

- interrupts : Should be the clock event device interrupt.

- clocks : The clocks provided by the SoC to drive the timer, must contain an

  entry for each entry in clock-names.

- clock-names : Must include the following entries:

  o "ftm-evt"

  o "ftm-src"

  o "ftm-evt-counter-en"

  o "ftm-src-counter-en"

- big-endian: One boolean property, the big endian mode will be in use if it is

  present, or the little endian mode will be in use for all the device registers.

Example:

ftm: ftm@400b8000 {

	compatible = "fsl,ftm-timer";

	reg = <0x400b8000 0x1000 0x400b9000 0x1000>;

	interrupts = <0 44 IRQ_TYPE_LEVEL_HIGH>;

	clock-names = "ftm-evt", "ftm-src",

		"ftm-evt-counter-en", "ftm-src-counter-en";

	clocks = <&clks VF610_CLK_FTM2>,

		<&clks VF610_CLK_FTM3>,

		<&clks VF610_CLK_FTM2_EXT_FIX_EN>,

		<&clks VF610_CLK_FTM3_EXT_FIX_EN>;

	big-endian;

};