[yocto] FrameBuffer support

[Jonathan Vervaeke]

Hi,

I'm trying to make framebuffers work on imx6(ul) using yocto.

I suppose I need to make changes in the following:

1) Kernel modules

2) Device tree

3) U-Boot bootargs

I've build my kernel with the following modules


********************************************

FB_TFT=y

CONFIG_FB_TFT_ILI9325=m

********************************************


I added the following to the device tree

********************************************

/ {
      itdb28 {
         compatible = "ilitek,ili9325";
         status = "okay";

         rotate = <0>;
         bgr;
         buswidth = <8>;
         reset-gpios = <&gpio3 23 0>;
         dc-gpios = <&gpio3  5 0>;
         cs-gpios = <&gpio3  1 0>;
         wr-gpios = <&gpio3  0 0>;
         db-gpios = <&gpio3  7 0>,
                <&gpio3  8 0>,
                <&gpio3  9 0>,
                <&gpio3 10 0>,
                <&gpio3 11 0>,
                <&gpio3 15 0>,
                <&gpio3 16 0>,
                <&gpio3 17 0>;
         /* LED pin drives backlight directly. Use transistor (50mA) */
         /* led-gpios = <&gpio 4 1>; */
         debug = <7>;
     };


     framebuffer {
         compatible = "simple-framebuffer";
         reg = <0x1d385000 (240 * 320 * 2)>;
         width = <240>;
         height = <320>;
         stride = <(240 * 2)>;
         format = "r5g6b5";
     };
};

********************************************


When I boot, I get the following error:

********************************************

Error opening /dev/fb0: No such file or directory

********************************************


Did I forget something or is there a decent manual available?

Thanks!

Jonathan.

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