Onboard IR receiver

[plambe]

Hi!

I'm unable to find any info about how to start using the onboard IR receiver on the Rock64 on linux.

Can you point me to some info on this subject?

[plambe]

Bump!

I don't need a detailed tutorial, but giving me a GPIO pin to which the IR receiver is connected or where do I put a dt_overlay setting, or something of this sort which gives me a direction would be welcome.

[Kwiboo]

The device tree node below should enable the IR receiver.

Code:

ir-receiver {
    compatible = "gpio-ir-receiver";
    gpios = <&gpio2 RK_PA2 GPIO_ACTIVE_LOW>;
    linux,rc-map-name = "rc-pine64";
    pinctrl-0 = <&ir_int>;
    pinctrl-names = "default";
    status = "okay";
};

See https://github.com/Kwiboo/linux-rockchip...#L108-L115

[plambe]

Thanks a lot!

I failed multiple times using only the info you gave me and what I gathered from around the internet about device trees. Still, I learned that by using dtc to output the default dtb in dts format and using the latest debian stretch from ayufan (stretch-minimal-rock64-0.6.23-189-arm64.img), there actually is an ir-receiver:

Code:

       ir-receiver {
               compatible = "gpio-ir-receiver";
               pinctrl-0 = <0x8b>;
               pinctrl-names = "default";
               status = "okay";
       };

So my question is - how do I add the missing node properties without using variables? I know hardcoding values is bad style, but I think this would be the easiest approach for me. In other words, how do I manually convert for example:

Code:

<&gpio2 RK_PA2 GPIO_ACTIVE_LOW>

Into a value like:

Code:

<0x8b>

My idea is to do that for all the missing/differing properties:

Code:

   gpios = <&gpio2 RK_PA2 GPIO_ACTIVE_LOW>;
   linux,rc-map-name = "rc-pine64";
   pinctrl-0 = <&ir_int>;

And then to compile the patched dts into dtb and overwrite the current dtb.

I'm lost in the sources in your github, I obviously don't understand enough (or, well, anything) about device trees, etc. so I will once again be very thankful for any help and direction.