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dt: bindings: i2c-mux-pca954x: Add documentation for interrupt controller

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Various muxes can aggregate multiple irq lines and provide a control
register to determine the active line. Add bindings for interrupt
controller support.

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Phil Reid <preid@electromag.com.au>
Signed-off-by: Peter Rosin <peda@axentia.se>
This commit is contained in:
Phil Reid 2017-01-25 09:31:07 +08:00 committed by Peter Rosin
parent f8251f1dfd
commit 9aedcc61ed
1 changed files with 13 additions and 1 deletions
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14
Documentation/devicetree/bindings/i2c/i2c-mux-pca954x.txt
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@ -19,7 +19,14 @@ Optional Properties:
- i2c-mux-idle-disconnect: Boolean; if defined, forces mux to disconnect all
children in idle state. This is necessary for example, if there are several
multiplexers on the bus and the devices behind them use same I2C addresses.
- interrupt-parent: Phandle for the interrupt controller that services
interrupts for this device.
- interrupts: Interrupt mapping for IRQ.
- interrupt-controller: Marks the device node as an interrupt controller.
- #interrupt-cells : Should be two.
- first cell is the pin number
- second cell is used to specify flags.
See also Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
Example:
@ -29,6 +36,11 @@ Example:
#size-cells = <0>;
reg = <0x74>;
interrupt-parent = <&ipic>;
interrupts = <17 IRQ_TYPE_LEVEL_LOW>;
interrupt-controller;
#interrupt-cells = <2>;
i2c@2 {
#address-cells = <1>;
#size-cells = <0>;