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&spi0{
    status = "okay";
    st7789v: st7789v@0{
        compatible = "sitronix,st7789v";
        reg = <0>;
        status = "okay";
        spi-max-frequency = <32000000>;
        spi-cpol;
        spi-cpha;
        rotate = <0>;
        fps = <10>;
        buswidth = <8>;
        rgb;
        dc-gpios    = <&pio 1 4 GPIO_ACTIVE_HIGH>;  // PB4 
        reset-gpios = <&pio 1 5 GPIO_ACTIVE_HIGH>;  // PB5
        //led-gpios   = <&pio 1 7 GPIO_ACTIVE_LOW>;   // PB7
        width = <240>;
        height= <320>;
        debug = <0>;
    };
};

开机
usbhid: USB HID core driver
[    1.092172] fbtft_of_value: width = 240
[    1.096011] fbtft_of_value: height = 320
[    1.099968] fbtft_of_value: buswidth = 8
[    1.103888] fbtft_of_value: debug = 0
[    1.107547] fbtft_of_value: rotate = 0
[    1.111304] fbtft_of_value: fps = 10
[    1.122424] mmc0: host does not support reading read-only switch, assuming write-enable
[    1.132420] mmc0: new high speed SD card at address 21b7
[    1.139811] mmcblk0: mmc0:21b7 APPSD 480 MiB 
[    1.146192]  mmcblk0: p1 p2
[    1.691784] random: fast init done
[    1.740803] Console: switching to colour frame buffer device 30x40
[    1.747711] graphics fb0: fb_st7789v frame buffer, 240x320, 150 KiB video memory, 4 KiB buffer memory, fps=10, spi0.0 at 32 MHz

# ./usr/bin/fb-test
fb-test 1.1.0 (rosetta)
fb res 240x320 virtual 240x320, line_len 480, bpp 16

# cat /dev/urandom > /dev/fb0
cat: write error: No space left on device