On 03/31/2015 03:17 PM, Dmitry Torokhov wrote:
On Tue, Mar 31, 2015 at 02:57:35PM -0500, Thor Thayer wrote:
Hi,
I have a SPI gpio expander chip that is using the regmap framework.
There are some pushbuttons that I'd like to use the gpio_keys
framework for but only the first button press creates an input
event.
It seems like my problem occurs because I'm only getting events on a
button press. The input_get_disposition() function toggles a local
copy of the button state [__change_bit(code, dev->key);] in the
input.c file. I think this function also needs to be called when the
button is released to toggle the dev->key state and re-arm for the
next button press.
Yes.
I tried enabling autorepeat but that causes an infinite loop in the
input_repeat_key() function.
In both cases, it seems like the button press condition must be
cleared when the button is released. This seems like it should be
common for all GPIOs so I'm probably missing something.
It sounds like your expander does not generate interrupt when the button
is released and so gpio-keys driver is not aware of it.
Thanks.
Thanks for the quick reply. Is giving an interrupt on both press and
release a requirement for gpio-keys? or is there another setup that I'm
not aware of?
How does the gpio-key framework work with register mapped GPIOs that are
rising-edge or falling-edge triggered? I tend to think of these IRQ
states as the general case for GPIO.
Thanks
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