mfd: Add DT binding for Maxim MAX77802 IC

The MAX77802 is a chip that contains regulators, 2 32kHz clocks,
a RTC and an I2C interface to program the individual components.

The are already DT bindings for the regulators and clocks and
these reference to a bindings/mfd/max77802.txt file, that didn't
exist, for the details about the PMIC.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

diff --git a/Documentation/devicetree/bindings/mfd/max77802.txt b/Documentation/devicetree/bindings/mfd/max77802.txt
new file mode 100644 (file)
index 0000000..51fc1a6
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/max77802.txt
@@ -0,0 +1,26 @@
+Maxim MAX77802 multi-function device
+
+The Maxim MAX77802 is a Power Management IC (PMIC) that contains 10 high
+efficiency Buck regulators, 32 Low-DropOut (LDO) regulators used to power
+up application processors and peripherals, a 2-channel 32kHz clock outputs,
+a Real-Time-Clock (RTC) and a I2C interface to program the individual
+regulators, clocks outputs and the RTC.
+
+Bindings for the built-in 32k clock generator block and
+regulators are defined in ../clk/maxim,max77802.txt and
+../regulator/max77802.txt respectively.
+
+Required properties:
+- compatible           : Must be "maxim,max77802"
+- reg                  : Specifies the I2C slave address of PMIC block.
+- interrupts           : I2C device IRQ line connected to the main SoC.
+- interrupt-parent     : The parent interrupt controller.
+
+Example:
+
+       max77802: pmic@09 {
+               compatible = "maxim,max77802";
+               interrupt-parent = <&intc>;
+               interrupts = <26 IRQ_TYPE_NONE>;
+               reg = <0x09>;
+       };