dt-bindings: power: supply: Add bindings for Microchip UCS1002

Add bindings for Microchip UCS1002 Programmable USB Port Power
Controller with Charger Emulation.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Reviewed-by: Rob Herring <robh+dt@kernel.org>
Cc: Enric Balletbo Serra <enric.balletbo@collabora.com>
Cc: Chris Healy <cphealy@gmail.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: linux-kernel@vger.kernel.org
Cc: linux-pm@vger.kernel.org
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

diff --git a/Documentation/devicetree/bindings/power/supply/microchip,ucs1002.txt b/Documentation/devicetree/bindings/power/supply/microchip,ucs1002.txt
new file mode 100644 (file)
index 0000000..1d284ad
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/supply/microchip,ucs1002.txt
@@ -0,0 +1,27 @@
+Microchip UCS1002 USB Port Power Controller
+
+Required properties:
+- compatible           : Should be "microchip,ucs1002";
+- reg                  : I2C slave address
+
+Optional properties:
+- interrupts           : A list of interrupts lines present (could be either
+                         corresponding to A_DET# pin, ALERT# pin, or both)
+- interrupt-names      : A list of interrupt names. Should contain (if
+                         present):
+                         - "a_det" for line connected to A_DET# pin
+                         - "alert" for line connected to ALERT# pin
+                         Both are expected to be IRQ_TYPE_EDGE_BOTH
+Example:
+
+&i2c3 {
+       charger@32 {
+               compatible = "microchip,ucs1002";
+               pinctrl-names = "default";
+               pinctrl-0 = <&pinctrl_ucs1002_pins>;
+               reg = <0x32>;
+               interrupts-extended = <&gpio5 2 IRQ_TYPE_EDGE_BOTH>,
+                                     <&gpio3 21 IRQ_TYPE_EDGE_BOTH>;
+               interrupt-names = "a_det", "alert";
+       };
+};