Hi Geert,
On 09/01/2015 07:00 PM, Geert Uytterhoeven wrote:
Hi,
I'm wondering if there already exists a driver for a gpio that's connected
to both an LED and an input switch.
I'd expect such a hardware configuration to be fairly common, as gpios can be
a limited resource.
Most of the time the gpio would be in output mode, driving the LED, but at
regular intervals the mode would be changed for a very short moment to input,
to monitor the state of the switch.
I had a quick look at various drivers (and of course at
Documentation/gpio/drivers-on-gpio.txt), but couldn't find any.
Does such a hybrid of "leds-gpio" and "gpio-keys(-polled)" already exists?
Can you share an example of such a circuit? Would it be possible to
construct it without additional GPIO driven transistor?
--
Best Regards,
Jacek Anaszewski
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