Hi everyone,
I'm struggling to get gpio_keys working.
I'm trying to use the overlay, which I have attached below, but after reboot there is no event node listed in "/dev/input/". (There is only one node named mice.)
Inspecting dmesg, I found the following error messages:
[ 1.529891] sun50i-h616-pinctrl 300b000.pinctrl: pin PC8 already requested by gpio-keys-user; cannot claim for 300b000.pinctrl:72
[ 1.529917] gpio-keys gpio-keys-user: failed to get gpio: -22
[ 1.529926] gpio-keys: probe of gpio-keys-user failed with error -22
Inspecting the dts file of my board (orange pi zero 2), I found that PC5,PC6 and PC8 are already listed as mmc2-pins, but mmc2 is disabled, so I don't think that this is the issue. However, I have no idea what else might be wrong.
Any help?
Attachements:
custom-keys.dts Overlay:
/dts-v1/;
/plugin/;
/ {
compatible = "allwinner,sun50i-h616";
fragment@0 {
target = <&pio>;
__overlay__ {
custom-buttons: custom-buttons {
pins = "PC5","PC6","PC8";
function = "gpio_in";
bias-pull-up;
};
};
};
fragment@1 {
target-path = "/";
__overlay__ {
gpio-keys-user {
compatible = "gpio-keys";
pinctrl-names = "default";
pinctrl-0 = <&custom-buttons>;
play_button {
label = "GPIO Key 1";
linux,code = <25>;
gpios = <&pio 0 69 1>;
};
vol_up_button {
label = "GPIO Key 2";
linux,code = <22>;
gpios = <&pio 0 70 1>;
};
vol_down_button {
label = "GPIO Key 3";
linux,code = <32>;
gpios = <&pio 0 72 1>;
};
};
};
};
};
