diff --git a/arch/arm/boot/dts/overlays/Makefile b/arch/arm/boot/dts/overlays/Makefile index 38046efd5fdd86..5c07ff08e14170 100644 --- a/arch/arm/boot/dts/overlays/Makefile +++ b/arch/arm/boot/dts/overlays/Makefile @@ -135,6 +135,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \ spi2-1cs.dtbo \ spi2-2cs.dtbo \ spi2-3cs.dtbo \ + ssd1306.dtbo \ superaudioboard.dtbo \ sx150x.dtbo \ tc358743.dtbo \ diff --git a/arch/arm/boot/dts/overlays/README b/arch/arm/boot/dts/overlays/README index ed582bc3737506..707ea49cb6b31a 100644 --- a/arch/arm/boot/dts/overlays/README +++ b/arch/arm/boot/dts/overlays/README @@ -1950,6 +1950,37 @@ Params: cs0_pin GPIO pin for CS0 (default 43 - BCM SPI2_CE0). is 'okay' or enabled). +Name: ssd1306 +Info: Overlay for activation of SSD1306 over I2C OLED display framebuffer. +Load: dtoverlay=ssd1306,= +Params: address Location in display memory of first character. + (default=0) + width Width of display. (default=128) + height Height of display. (default=64) + offset virtual channel a. (default=0) + normal Has no effect on displays tested. (default=not + set) + sequential Set this if every other scan line is missing. + (default=not set) + remapped Set this if display is garbled. (default=not + set) + inverted Set this if display is inverted and mirrored. + (default=not set) + + Examples: + Typical usage for 128x64 display: dtoverlay=ssd1306,inverted + + Typical usage for 128x32 display: dtoverlay=ssd1306,inverted,sequential + + i2c_baudrate=400000 will speed up the display. + + i2c_baudrate=1000000 seems to work even though it's not officially + supported by the hardware, and is faster still. + + For more information refer to the device datasheet at: + https://cdn-shop.adafruit.com/datasheets/SSD1306.pdf + + Name: superaudioboard Info: Configures the SuperAudioBoard sound card Load: dtoverlay=superaudioboard,= diff --git a/arch/arm/boot/dts/overlays/ssd1306-overlay.dts b/arch/arm/boot/dts/overlays/ssd1306-overlay.dts new file mode 100644 index 00000000000000..2cf677d59a7f9a --- /dev/null +++ b/arch/arm/boot/dts/overlays/ssd1306-overlay.dts @@ -0,0 +1,36 @@ +// Overlay for SSD1306 128x64 and 128x32 OLED displays +/dts-v1/; +/plugin/; + +/ { + compatible = "brcm,bcm2718"; + + fragment@0 { + target = <&i2c1>; + __overlay__ { + status = "okay"; + + #address-cells = <1>; + #size-cells = <0>; + + ssd1306: oled@3c{ + compatible = "solomon,ssd1306fb-i2c"; + reg = <0x3c>; + solomon,width = <128>; + solomon,height = <64>; + solomon,page-offset = <0>; + }; + }; + }; + + __overrides__ { + address = <&ssd1306>,"reg:0"; + width = <&ssd1306>,"solomon,width:0"; + height = <&ssd1306>,"solomon,height:0"; + offset = <&ssd1306>,"solomon,page-offset:0"; + normal = <&ssd1306>,"solomon,segment-no-remap?"; + sequential = <&ssd1306>,"solomon,com-seq?"; + remapped = <&ssd1306>,"solomon,com-lrremap?"; + inverted = <&ssd1306>,"solomon,com-invdir?"; + }; +};