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 -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
