M. Hatef

ok I got it working by modifying my dts file.
I am sharing it here for those who face the issue. So you dont have to waste days while pulling your hairs  
/dts-v1/; /plugin/; / { compatible = "rockchip,rk3568"; /* Update to match your SoC */ fragment@0 { target = <&spi3>; /* Correct SPI3 node */ __overlay__ { #address-cells = <1>; #size-cells = <0>; pinctrl-names = "default"; pinctrl-0 = <&spi3m1_pins &spi3m1_cs0>; /* Reference correct pin configuration */ status = "okay"; /* Enable SPI3 */ spidev@0 { compatible = "armbian,spi-dev"; reg = <0x00>; spi-max-frequency = <5000000>; status = "okay"; }; }; }; };