dt-bindings: nvmem: Add i.MX IIM binding doc

The IIM is part of the i.MX device trees for long already, add a binding
document for it.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/Documentation/devicetree/bindings/nvmem/imx-iim.txt b/Documentation/devicetree/bindings/nvmem/imx-iim.txt
new file mode 100644 (file)
index 0000000..1978c5b
--- /dev/null
+++ b/Documentation/devicetree/bindings/nvmem/imx-iim.txt
@@ -0,0 +1,22 @@
+Freescale i.MX IC Identification Module (IIM) device tree bindings
+
+This binding represents the IC Identification Module (IIM) found on
+i.MX25, i.MX27, i.MX31, i.MX35, i.MX51 and i.MX53 SoCs.
+
+Required properties:
+- compatible: should be one of
+       "fsl,imx25-iim", "fsl,imx27-iim",
+       "fsl,imx31-iim", "fsl,imx35-iim",
+       "fsl,imx51-iim", "fsl,imx53-iim",
+- reg: Should contain the register base and length.
+- interrupts: Should contain the interrupt for the IIM
+- clocks: Should contain a phandle pointing to the gated peripheral clock.
+
+Example:
+
+       iim: iim@63f98000 {
+               compatible = "fsl,imx53-iim", "fsl,imx27-iim";
+               reg = <0x63f98000 0x4000>;
+               interrupts = <69>;
+                clocks = <&clks IMX5_CLK_IIM_GATE>;
+       };