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

+Luotao Fu

On Sat, Nov 03, 2012 at 00:25:53, Stephen Warren wrote:

On 11/02/2012 05:03 AM, AnilKumar Ch wrote:

quoted

Add device tree support to matrix keypad driver and usage details
are added to device tree documentation. Driver was tested on AM335x
EVM.

quoted

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

quoted

+Optional Properties:

quoted

+- 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?

These are clustered-irq corresponding flags whether the IRQ is
IRQF_TRIGGER_RISING (or) IRQF_TRIGGER_FALLING (or) both and etc.
I have given the pointers based on this patch
https://lkml.org/lkml/2010/5/27/45

I am not able to provide the further details because my hardware is
different. Luotao Fu have added the clustered-irq support he might
have some pointers here.

Hi Luotao Fu,

Do you have any comments here?

Thanks
AnilKumar