Hi,
I want to add a TCA8418 I2C Keypad Controller to my Custom carrier board.
I would like to modify the imx6dl-colibri-v3.dts to support TCA8418 (I’m newbie about DTS configuration).
In my carrier I connect the TCA8418 to the standar Colibri imx6 I2C.
I add an “tca8418@34” paragraph to the imx6dl-colibri-v3.dts file (Inside “i2c3” paragraph, and after “rtc_i2c”).
Something like that:
&i2c3 {
status = "okay";
....
/* M41T0M6 real time clock on carrier board */
rtc_i2c: rtc@68 {
compatible = "st,m41t00";
reg = <0x68>;
};
/* Add TCA8418 Support */
tca8418@34 {
compatible = "ti,tca8418";
reg = <0x34>;
interrupt-parent = <&gpio6>;
interrupts = <17 0x2>;
keypad,num-rows = <8>;
keypad,num-columns = <10>;
linux,keymap = <
0x0306003b
0x0203003c
0x02040057
0x01080058
...
0x06000111>;
};
};
My questions are:
-
Which colibri-imx6 GPIO pin could I connect to the TCA8418 interrupt pin?.
-
How do I configure the interrupt in the DTS file?.
How do I associate, interrupt-parent and interrupts with GPIO chosen physical interrupt in my carrier/colibri-imx6?.
Regards,
Peio