[PATCH v3] Input: matrix-keypad - Add device tree support

[Stephen Warren]

On 11/02/2012 05:03 AM, AnilKumar Ch wrote:
> Add device tree support to matrix keypad driver and usage details
> are added to device tree documentation. Driver was tested on AM335x
> EVM.

> +++ b/Documentation/devicetree/bindings/input/gpio-matrix-keypad.txt

> +Optional Properties:

> +- clustered-irq:	have clustered irq number, that is needed if the irq
> +			is a combined irq source for the whole matix keypad.
> +			This is useful if rows and columns of the keypad are
> +			connected to a GPIO expander.
> +- clustered-irq-flags:	clustered irq flags

Shouldn't the GPIO expander itself be an IRQ controller too? What are
the clustered-irq-flags values?