[RESEND PATCH v4 1/2] devicetree: Add UCS1002 USB Port Power Controller binding

Enric Balletbo i Serra
2016-04-15T07:26:58Z

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@collabora.com>
Acked-by: Rob Herring <robh@kernel.org>
---
Changes since v3:
- Added Acked-by: Rob Herring <robh@kernel.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