ssd1307fb.txt

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    1 * Solomon SSD1307 Framebuffer Driver
    2 
    3 Required properties:
    4   - compatible: Should be "solomon,<chip>fb-<bus>". The only supported bus for
    5     now is i2c, and the supported chips are ssd1305, ssd1306, ssd1307 and
    6     ssd1309.
    7   - reg: Should contain address of the controller on the I2C bus. Most likely
    8          0x3c or 0x3d
    9   - pwm: Should contain the pwm to use according to the OF device tree PWM
   10          specification [0]. Only required for the ssd1307.
   11   - solomon,height: Height in pixel of the screen driven by the controller
   12   - solomon,width: Width in pixel of the screen driven by the controller
   13   - solomon,page-offset: Offset of pages (band of 8 pixels) that the screen is
   14     mapped to.
   15 
   16 Optional properties:
   17   - reset-gpios: The GPIO used to reset the OLED display, if available. See
   18                  Documentation/devicetree/bindings/gpio/gpio.txt for details.
   19   - vbat-supply: The supply for VBAT
   20   - solomon,segment-no-remap: Display needs normal (non-inverted) data column
   21                               to segment mapping
   22   - solomon,col-offset: Offset of columns (COL/SEG) that the screen is mapped to.
   23   - solomon,com-seq: Display uses sequential COM pin configuration
   24   - solomon,com-lrremap: Display uses left-right COM pin remap
   25   - solomon,com-invdir: Display uses inverted COM pin scan direction
   26   - solomon,com-offset: Number of the COM pin wired to the first display line
   27   - solomon,prechargep1: Length of deselect period (phase 1) in clock cycles.
   28   - solomon,prechargep2: Length of precharge period (phase 2) in clock cycles.
   29                          This needs to be the higher, the higher the capacitance
   30                          of the OLED's pixels is
   31   - solomon,dclk-div: Clock divisor 1 to 16
   32   - solomon,dclk-frq: Clock frequency 0 to 15, higher value means higher
   33                       frequency
   34   - solomon,lookup-table: 8 bit value array of current drive pulse widths for
   35                           BANK0, and colors A, B, and C. Each value in range
   36                           of 31 to 63 for pulse widths of 32 to 64. Color D
   37                           is always width 64.
   38   - solomon,area-color-enable: Display uses color mode
   39   - solomon,low-power. Display runs in low power mode
   40 
   41 [0]: Documentation/devicetree/bindings/pwm/pwm.txt
   42 
   43 Examples:
   44 ssd1307: oled@3c {
   45         compatible = "solomon,ssd1307fb-i2c";
   46         reg = <0x3c>;
   47         pwms = <&pwm 4 3000>;
   48         reset-gpios = <&gpio2 7>;
   49 };
   50 
   51 ssd1306: oled@3c {
   52         compatible = "solomon,ssd1306fb-i2c";
   53         reg = <0x3c>;
   54         pwms = <&pwm 4 3000>;
   55         reset-gpios = <&gpio2 7>;
   56         solomon,com-lrremap;
   57         solomon,com-invdir;
   58         solomon,com-offset = <32>;
   59         solomon,lookup-table = /bits/ 8 <0x3f 0x3f 0x3f 0x3f>;
   60 };

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sys/contrib/device-tree/Bindings/display/ssd1307fb.txt