[PATCH v3 1/2] devicetree: Add UCS1002 USB Port Power Controller binding
From: Enric Balletbo i Serra <hidden>
Date: 2016-02-23 07:27:26
Also in:
linux-pm, lkml
Subsystem:
open firmware and flattened device tree bindings, the rest · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
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-ZGY8ohtN/8qB+jHODAdFcQ@public.gmane.org>
---
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
--
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