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Hello, please help me. I have been doing research these past five days on how I can create a dts file for the Levetop LT7686. This LCD has no D/C or RS pin, which means this LCD is 9-bit SPI TFT LCD. Any clue? I tried with this dts file:

 

/dts-v1/;
/plugin/;

/ {
        compatible = "rockchip,rk3588";

        fragment@0 {
                target = <&spi4>;
                __overlay__ {
                        status = "okay";
                        #address-cells = <1>;
                        #size-cells = <0>;
                        cs-gpios = <&gpio1 52 0>;
                         
                        panel@0{
                                status = "okay";
                                compatible = "sitronix,st7789v";
                                reg = <0x00>;
                                spi-max-frequency = <16000000>;
                                txbuflen = <32768>;
                                rotate = <90>;
                                bgr = <0>;
                                fps = <30>;
                                buswidth = <8>
                                reset-gpios = <&gpio0 29 1>;
                                debug = <0>;
                                

                                init = <0x05 0xca
                                        0x07 0x8a
                                        0x09 0x8a
                                        0x06 0x66
                                        0x08 0x64
                                        0x0a 0x64
                                        ...  /* more init codes */>;
                        };
                };        
        };
};               

 

The dmesg output reminds me that I didn't set 'dc-gpios' and then fails the spi device registration, sometimes it says chipselect 1 is already in use.

 

Does anyone have any ideas?

Thanks in advance!

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