LCD debug

9341 正常的訊息 

-----------

[    1.664021] ili9341@0 enforce active low on GPIO handle

[    6.580043] fb_ili9341: module is from the staging directory, the quality is 

unknown, you have been warned.

[    6.580648] fb_ili9341 spi0.0: fbtft_property_value: width = 240

[    6.580674] fb_ili9341 spi0.0: fbtft_property_value: height = 320

[    6.580685] fb_ili9341 spi0.0: fbtft_property_value: buswidth = 8

[    6.580697] fb_ili9341 spi0.0: fbtft_property_value: debug = 4

[    6.580706] fb_ili9341 spi0.0: fbtft_property_value: rotate = 90

[    6.580716] fb_ili9341 spi0.0: fbtft_property_value: fps = 30

[    6.580973] fb_ili9341 spi0.0: fbtft_request_one_gpio: 'reset' GPIO

[    6.581032] fb_ili9341 spi0.0: fbtft_request_one_gpio: 'dc' GPIO

[    6.581067] fb_ili9341 spi0.0: fbtft_request_one_gpio: 'rd' GPIO

 ........... 一直重複 -----------

[    6.581590] fb_ili9341 spi0.0: fbtft_request_one_gpio: 'db' GPIO

...

[    6.887247] fb_ili9341 spi0.0: Display update: 3837 kB/s, fps=0

[    6.888155] Console: switching to colour frame buffer device 40x30

[    6.888772] graphics fb0: fb_ili9341 frame buffer, 320x240, 150 KiB video memory, 16 KiB buffer memory, fps=31, spi0.0 at 40 MHz

[    6.999727] systemd[1]: Starting systemd-backlight@backlight:fb_ili9341.service - Load/Save Screen Backlight Brightness of backlight:fb_ili9341...

[    7.003913] systemd[1]: Finished systemd-binfmt.service - Set Up Additional Binary Formats.

[    7.023356] usb 2-1: Firmware revision 11.1 (signature 0x88e1)

[    7.080231] systemd[1]: Finished systemd-backlight@backlight:fb_ili9341.service - Load/Save Screen Backlight Brightness of backlight:fb_ili9341.

--------------

使用 lsmod 

-------------

Module                  Size  Used by

fb_ili9341             12288  1

fbtft                  36864  1 fb_ili9341

-------------

https://mjmwired.net/kernel/Documentation/devicetree/bindings/display/ilitek,ili9486.yaml