Documentation: Describe bindings for STMPE Multi-Functional Device driver

Here we add the required documentation for the STMPE Multi-Functional
Device (MFD) Device Tree bindings. It describes all of the bindings
currently supported by the driver.

Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

diff --git a/Documentation/devicetree/bindings/mfd/stmpe.txt b/Documentation/devicetree/bindings/mfd/stmpe.txt
new file mode 100644 (file)
index 0000000..8f0aeda
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/stmpe.txt
@@ -0,0 +1,25 @@
+* STMPE Multi-Functional Device
+
+Required properties:
+ - compatible                   : "st,stmpe[811|1601|2401|2403]"
+ - reg                          : I2C address of the device
+
+Optional properties:
+ - interrupts                   : The interrupt outputs from the controller
+ - interrupt-controller         : Marks the device node as an interrupt controller
+ - interrupt-parent             : Specifies which IRQ controller we're connected to
+ - i2c-client-wake              : Marks the input device as wakable
+ - st,autosleep-timeout         : Valid entries (ms); 4, 16, 32, 64, 128, 256, 512 and 1024
+
+Example:
+
+       stmpe1601: stmpe1601@40 {
+               compatible = "st,stmpe1601";
+               reg = <0x40>;
+               interrupts = <26 0x4>;
+               interrupt-parent = <&gpio6>;
+               interrupt-controller;
+
+               i2c-client-wake;
+               st,autosleep-timeout = <1024>;
+       };