dt-bindings: Add devicetree bindings

Add snapshot of device tree bindings from keystone common kernel, branch
"android-mainline-keystone-qcom-release" at c4c12103f9c0 ("Snap for 9228065
from e32903b9a63bb558df8b803b076619c53c16baad to
android-mainline-keystone-qcom-release").

Change-Id: I7682079615cbd9f29340a5c1f2a1d84ec441a1f1
Signed-off-by: Melody Olvera <quic_molvera@quicinc.com>

bindings/timer/fsl,ftm-timer.txt

@@ -0,0 +1,31 @@
+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;
+};