Hi all
I'm working on custom board build with an nrf9161. Right now I'd like to use a gpio as input with interrupt for i2c captor icm20948. So for I've searched and I think I have 2 solutions but which one is better
First solution : in my common dtsi file add section like gpio-keys like a button. Is there a another solution because use button is not fine I think...
Second solution: I see in nrf9161dk board file something like this
arduino_i2c: &i2c2 {
compatible = "nordic,nrf-twim";
status = "okay";
pinctrl-0 = <&i2c2_default>;
pinctrl-1 = <&i2c2_sleep>;
pinctrl-names = "default", "sleep";
clock-frequency = <I2C_BITRATE_FAST>;
pcal6408a: pcal6408a@21 {
compatible = "nxp,pcal6408a";
status = "disabled";
reg = <0x21>;
gpio-controller;
#gpio-cells = <2>;
ngpios = <8>;
int-gpios = <&gpio0 19 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
};
};
It's look like there is an i2c captor on i2c2 and use interupt on gpio 19, so for me icm20948 I have to develop the library to comunicate with it so this is a better solution or not ?