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dt-bindings: extcon: Add support for Richtek RT8973A MUIC device

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This patch add documentation for binding of Richtek RT8973A (Micro USB Switch)
device which is using EXTCON subsystem. The RT8973A device can detect various
external accessories when external accessories is attached or detached.

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
This commit is contained in:
Chanwoo Choi 2014-08-04 15:54:14 +09:00
parent c03e017c4d
commit 6281100ec8
1 changed files with 25 additions and 0 deletions
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Documentation/devicetree/bindings/extcon/extcon-rt8973a.txt Normal file
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* Richtek RT8973A - Micro USB Switch device
The Richtek RT8973A is Micro USB Switch with OVP and I2C interface. The RT8973A
is a USB port accessory detector and switch that is optimized to protect low
voltage system from abnormal high input voltage (up to 28V) and supports high
speed USB operation. Also, RT8973A support 'auto-configuration' mode.
If auto-configuration mode is enabled, RT8973A would control internal h/w patch
for USB D-/D+ switching.
Required properties:
- compatible: Should be "richtek,rt8973a-muic"
- reg: Specifies the I2C slave address of the MUIC block. It should be 0x14
- interrupt-parent: Specifies the phandle of the interrupt controller to which
the interrupts from rt8973a are delivered to.
- interrupts: Interrupt specifiers for detection interrupt sources.
Example:
rt8973a@14 {
compatible = "richtek,rt8973a-muic";
interrupt-parent = <&gpx1>;
interrupts = <5 0>;
reg = <0x14>;
};