The base device tree for the Renegade (roc-rk3328-cc) already includes a PWM2 device but armbian does not include the .dtbo to enable it. Thus, it is also unavailable through armbian-config. The Libre builds of Debian support it, but not armbian.
I have copied the overlay from the Libre build of Debian for Renegade and it applies correctly on after I manually add it to the overlay directory:
/boot/dtb-6.12.32-current-rockchip64/rockchip/overlay/rockchip-rk3328-pwm2.dtbo
Note that as of today armbian-config is having a general issue with loading overlays via armbianEnv.txt. This can be bypassed by avoiding using armbian-config for overlays and editing armbianEnv.txt directly and adding the overlay name to the overlays= line minus the "rockchip-" prefix.
FWIW - here's the overlay source:
===========================
/dts-v1/;
/ {
compatible = "libretech,roc-rk3328-cc\0rockchip,rk3328";
fragment@0 {
target = <0xffffffff>;
__overlay__ {
status = "okay";
};
};
__fixups__ {
pwm2 = "/fragment@0:target:0";
};
};
