topic Activating interrupt in device tree in i.MX Processors

Activating interrupt in device tree

arisav — Fri, 08 Apr 2016 12:48:08 GMT

We have attached ar1021 i2c touch controller to our product which uses Kontron SMARC Soc. How can I define it in device tree?

ar1021 i2c touch controller's interrupt line is connected to the pin P109 which is defined in 'SMARC sMAX6i' manual as

Pin	Signal	Direction	Termination	Type/tol	Controller	Controller PIn name	Port dl	Port solo	iomux instance
P109	GPIO1 / CAM1_PWR#	Bi-Dir	PU-470k	CMOS / VDD_IO	iMX6	EIM_DA1	GPIO3_IO01	GPIO3_IO01	ALT5 / ALT5

I have tried define ar1021 in device tree as below. Driver loads proberly but interrupt callback function is never called.

&i2c3

{

status = "okay";

		ar1021@4D {

			compatible = "microchip,ar1021-i2c";

			reg = <0x4D>;

			interrupt-parent = <&gpio3>;

			interrupts = <1 IRQ_TYPE_EDGE_FALLING>;

			wakeup-gpios = <&gpio3 1 IRQ_TYPE_LEVEL_HIGH>;

};

Problem seems to be that interrupt for PIN P109 is not defined correctly. Any ideas?

igorpadykov — Sat, 09 Apr 2016 00:41:15 GMT

Hi Ari

please look at similar example for eGalax touch controller

Best regards

igor

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arisav — Mon, 11 Apr 2016 10:37:08 GMT

Thanks

I will try that.

Ari