The UCS1002-2 provides a USB port power switch for precise control of up
to 2.5 amperes continuous current.
You can add support to your board with current binding.
Example:
ucs1002: ucs1002@57 {
compatible = "microchip,ucs1002";
reg = <0x57>;
microchip,pin-ignore;
};
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx>
---
.../devicetree/bindings/power/ucs1002.txt | 47 ++++++++++++++++++++++
1 file changed, 47 insertions(+)
create mode 100644 Documentation/devicetree/bindings/power/ucs1002.txt
diff --git a/Documentation/devicetree/bindings/power/ucs1002.txt b/Documentation/devicetree/bindings/power/ucs1002.txt
new file mode 100644
index 0000000..1b89f0a
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/ucs1002.txt
@@ -0,0 +1,47 @@
+UCS1002-2 Programmable USB Port Power Controller with Charger Emulation bindings
+
+Required properties:
+- compatible: "microchip,ucs1002"
+- reg: integer, the I2C address of the device.
+
+Required properties (if pin-ignore functionality is not set):
+- em-gpios: which GPIO to use for EM_EN pin.
+- pwr-gpios: which GPIO to use for PWR_EN pin.
+- m1-gpios: which GPIO to use for M1 pin.
+- m2-gpios: which GPIO to use for M2 pin.
+
+Optional properties:
+- interrupt-parent: the phandle of the interrupt controller that services
+ interrupts for this device.
+- interrupts: interrupt specifiers for two interrupt sources.
+ - First interrupt specifier is for A_DET interrupt.
+ - Second interrupt specifier is for ALERT interrupt.
+- microchip,current-limit: integer, maximum current in mA. Note that the default
+ value is based on the resistor on the COMM_SEL/ILIM pin and this value cannot
+ be changed to be higher than hardware set value. Accepted values are: 500000,
+ 900000, 1000000, 1200000, 1500000, 1800000, 2000000, 2500000 (uA)
+- microchip,pin-ignore: boolean, if present uses I2C for configuration, otherwise,
+ we must provide EM_EN, M1 and M2 gpio mapping.
+
+Example (poll):
+
+ ucs1002: ucs1002@57 {
+ compatible = "microchip,ucs1002";
+ reg = <0x57>;
+ microchip,current-limit = <2000000>;
+ microchip,pin-ignore;
+ };
+
+Example (interrupts + pin control):
+
+ ucs1002: ucs1002@57 {
+ compatible = "microchip,ucs1002";
+ reg = <0x57>;
+ interrupt-parent = <&gpio0>;
+ interrupts = <30 0>, <31 0>;
+ microchip,current-limit = <2000000>;
+ em-gpios = <&gpio0 2 GPIO_ACTIVE_HIGH>;
+ m1-gpios = <&gpio0 3 GPIO_ACTIVE_HIGH>;
+ m2-gpios = <&gpio1 17 GPIO_ACTIVE_HIGH>;
+ pwr-gpios = <&gpio1 19 0>;
+ };
--
2.1.0
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