Hello,
im trying to map the i2c-2 to some GPIO ports and have to rewrite the device-tree on armbian 22.04.
I'm failing miserably and have no idea how-to do it. I managed to compile the i2c-gpio.ko kernel module as it is not part of the armbian 5.15.89-sunxi kernel.
However, here i'm stuck and cant manage to make it happen.
On RPi it was simple adding an overlay to config.txt:
dtoverlay=i2c-gpio,bus=2,i2c_gpio_sda=27,i2c_gpio_scl=17
/boot/overlays/i2c-gpio.dtbo
I'm trying to replicate that for Armbian, here is my dts file:
// Overlay for i2c_gpio bitbanging host bus.
/dts-v1/;
/plugin/;
/ {
compatible = "allwinner,sun8i-h3";
fragment@0 {
target-path = "/";
__overlay__ {
i2c_gpio: i2c@2 {
reg = <0>;
compatible = "i2c-gpio";
gpios = <&pio 17 0 /* sda */
&pio 27 0 /* scl */
>;
i2c-gpio,delay-us = <2>;
#address-cells = <1>;
#size-cells = <0>;
};
};
};
fragment@1 {
target-path = "/aliases";
__overlay__ {
i2c_gpio = "/i2c@2";
};
};
fragment@2 {
target-path = "/__symbols__";
__overlay__ {
i2c_gpio = "/i2c@2";
};
};
__overrides__ {
i2c_gpio_sda = <&i2c_gpio>,"gpios:4";
i2c_gpio_scl = <&i2c_gpio>,"gpios:16";
i2c_gpio_delay_us = <&i2c_gpio>,"i2c-gpio,delay-us:0";
bus = <&i2c_gpio>, "reg:0";
};
};
What am I doing wrong?
