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60 lines
2.7 KiB
60 lines
2.7 KiB
* Solomon SSD1307 Framebuffer Driver |
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Required properties: |
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- compatible: Should be "solomon,<chip>fb-<bus>". The only supported bus for |
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now is i2c, and the supported chips are ssd1305, ssd1306, ssd1307 and |
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ssd1309. |
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- reg: Should contain address of the controller on the I2C bus. Most likely |
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0x3c or 0x3d |
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- pwm: Should contain the pwm to use according to the OF device tree PWM |
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specification [0]. Only required for the ssd1307. |
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- solomon,height: Height in pixel of the screen driven by the controller |
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- solomon,width: Width in pixel of the screen driven by the controller |
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- solomon,page-offset: Offset of pages (band of 8 pixels) that the screen is |
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mapped to. |
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Optional properties: |
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- reset-gpios: The GPIO used to reset the OLED display, if available. See |
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Documentation/devicetree/bindings/gpio/gpio.txt for details. |
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- vbat-supply: The supply for VBAT |
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- solomon,segment-no-remap: Display needs normal (non-inverted) data column |
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to segment mapping |
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- solomon,col-offset: Offset of columns (COL/SEG) that the screen is mapped to. |
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- solomon,com-seq: Display uses sequential COM pin configuration |
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- solomon,com-lrremap: Display uses left-right COM pin remap |
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- solomon,com-invdir: Display uses inverted COM pin scan direction |
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- solomon,com-offset: Number of the COM pin wired to the first display line |
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- solomon,prechargep1: Length of deselect period (phase 1) in clock cycles. |
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- solomon,prechargep2: Length of precharge period (phase 2) in clock cycles. |
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This needs to be the higher, the higher the capacitance |
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of the OLED's pixels is |
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- solomon,dclk-div: Clock divisor 1 to 16 |
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- solomon,dclk-frq: Clock frequency 0 to 15, higher value means higher |
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frequency |
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- solomon,lookup-table: 8 bit value array of current drive pulse widths for |
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BANK0, and colors A, B, and C. Each value in range |
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of 31 to 63 for pulse widths of 32 to 64. Color D |
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is always width 64. |
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- solomon,area-color-enable: Display uses color mode |
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- solomon,low-power. Display runs in low power mode |
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[0]: Documentation/devicetree/bindings/pwm/pwm.txt |
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Examples: |
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ssd1307: oled@3c { |
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compatible = "solomon,ssd1307fb-i2c"; |
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reg = <0x3c>; |
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pwms = <&pwm 4 3000>; |
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reset-gpios = <&gpio2 7>; |
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}; |
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ssd1306: oled@3c { |
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compatible = "solomon,ssd1306fb-i2c"; |
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reg = <0x3c>; |
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pwms = <&pwm 4 3000>; |
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reset-gpios = <&gpio2 7>; |
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solomon,com-lrremap; |
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solomon,com-invdir; |
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solomon,com-offset = <32>; |
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solomon,lookup-table = /bits/ 8 <0x3f 0x3f 0x3f 0x3f>; |
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};
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