mfd: twl4030-power: Start transition to DT

Support for loading twl4030-power module via devicetree.
For now, when booting with a DT, only the poweroff callback
feature is supported through the ti,use_poweroff property.

Signed-off-by: Florian Vaussard <florian.vaussard@epfl.ch>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 28 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/mfd/twl4030-power.txt b/Documentation/devicetree/bindings/mfd/twl4030-power.txt
new file mode 100644
index 000000000000..8e15ec35ac99
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/twl4030-power.txt
@@ -0,0 +1,28 @@
+Texas Instruments TWL family (twl4030) reset and power management module
+
+The power management module inside the TWL family provides several facilities
+to control the power resources, including power scripts. For now, the
+binding only supports the complete shutdown of the system after poweroff.
+
+Required properties:
+- compatible : must be "ti,twl4030-power"
+
+Optional properties:
+- ti,use_poweroff: With this flag, the chip will initiates an ACTIVE-to-OFF or
+                   SLEEP-to-OFF transition when the system poweroffs.
+
+Example:
+&i2c1 {
+        clock-frequency = <2600000>;
+
+        twl: twl@48 {
+                reg = <0x48>;
+                interrupts = <7>; /* SYS_NIRQ cascaded to intc */
+                interrupt-parent = <&intc>;
+
+                twl_power: power {
+                        compatible = "ti,twl4030-power";
+                        ti,use_poweroff;
+                };
+        };
+};