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This one adds support of a combined irq source for the whole matrix keypad. This can be useful if all rows and columns of the keypad are e.g. connected to a GPIO expander, which only has one interrupt line for all events on every single GPIO. Signed-off-by: Luotao Fu <[email protected]> Acked-by: Eric Miao <[email protected]> Signed-off-by: Dmitry Torokhov <[email protected]>