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>; }; Signed-off-by: Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx> --- Changes since v2: - Rename microchip,current-limit to microchip,limit-microamps (Rob Herring) Changes since v1: - Fix units, are microamps (Rob Herring) - Remove microchip,pin-ignore as is implied by absence of gpio properties (Rob Herring) - Group control gpios instead of use separate gpios. All control gpios must be set together (Enric Balletbo) .../devicetree/bindings/power/ucs1002.txt | 41 ++++++++++++++++++++++ 1 file changed, 41 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..31f6e49 --- /dev/null +++ b/Documentation/devicetree/bindings/power/ucs1002.txt @@ -0,0 +1,41 @@ +UCS1002-2 Programmable USB Port Power Controller with Charger Emulation bindings + +Required properties: +- compatible: "microchip,ucs1002" +- reg: integer, the I2C address of the device. + +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,limit-microamps: integer, maximum current in microamps. 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 and + 2500000 (microamps). +- control-gpios = list of gpios used as pin states when determining the active mode + selection and power state. Must provide EM_EN, M1, M2 and PWR_EN gpio mapping. + If this property is not set it uses I2C for configuration. + +Example (polling): + + ucs1002: ucs1002@57 { + compatible = "microchip,ucs1002"; + reg = <0x57>; + microchip,limit-microamps = <2000000>; + }; + +Example (interrupts + control gpios): + + ucs1002: ucs1002@57 { + compatible = "microchip,ucs1002"; + reg = <0x57>; + interrupt-parent = <&gpio0>; + interrupts = <30 0>, <31 0>; + control-gpios = <&gpio0 2 GPIO_ACTIVE_HIGH>, /* EM_EN */ + <&gpio0 3 GPIO_ACTIVE_HIGH>, /* M1 */ + <&gpio1 17 GPIO_ACTIVE_HIGH>, /* M2 */ + <&gpio1 19 0>; /* PWR_EN */ + }; -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html