tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1* Solomon SSD1307 Framebuffer Driver
2
3Required 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
16Optional 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,com-seq: Display uses sequential COM pin configuration
23 - solomon,com-lrremap: Display uses left-right COM pin remap
24 - solomon,com-invdir: Display uses inverted COM pin scan direction
25 - solomon,com-offset: Number of the COM pin wired to the first display line
26 - solomon,prechargep1: Length of deselect period (phase 1) in clock cycles.
27 - solomon,prechargep2: Length of precharge period (phase 2) in clock cycles.
28 This needs to be the higher, the higher the capacitance
29 of the OLED's pixels is
30
31[0]: Documentation/devicetree/bindings/pwm/pwm.txt
32
33Examples:
34ssd1307: oled@3c {
35 compatible = "solomon,ssd1307fb-i2c";
36 reg = <0x3c>;
37 pwms = <&pwm 4 3000>;
38 reset-gpios = <&gpio2 7>;
39 reset-active-low;
40};
41
42ssd1306: oled@3c {
43 compatible = "solomon,ssd1306fb-i2c";
44 reg = <0x3c>;
45 pwms = <&pwm 4 3000>;
46 reset-gpios = <&gpio2 7>;
47 reset-active-low;
48 solomon,com-lrremap;
49 solomon,com-invdir;
50 solomon,com-offset = <32>;
51};