1 From db048a80e63c66607b3bd73fa641802ec83bf166 Mon Sep 17 00:00:00 2001
2 From: MikeDK <m.kaplan@evva.com>
3 Date: Fri, 31 Jan 2020 10:57:21 +0100
4 Subject: [PATCH] overlays: Add ssd1306-spi overlay (#3440)
6 Add an overlay for SSD1306 based OLED boards using SPI.
7 This will load the staging fbtft driver.
9 Signed-off-by: Michael Kaplan <m.kaplan@evva.com>
11 arch/arm/boot/dts/overlays/Makefile | 1 +
12 arch/arm/boot/dts/overlays/README | 12 +++
13 .../boot/dts/overlays/ssd1306-spi-overlay.dts | 82 +++++++++++++++++++
14 3 files changed, 95 insertions(+)
15 create mode 100644 arch/arm/boot/dts/overlays/ssd1306-spi-overlay.dts
17 --- a/arch/arm/boot/dts/overlays/Makefile
18 +++ b/arch/arm/boot/dts/overlays/Makefile
19 @@ -168,6 +168,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
24 superaudioboard.dtbo \
27 --- a/arch/arm/boot/dts/overlays/README
28 +++ b/arch/arm/boot/dts/overlays/README
29 @@ -2428,6 +2428,18 @@ Params: address Location
30 https://cdn-shop.adafruit.com/datasheets/SSD1306.pdf
34 +Info: Overlay for SSD1306 OLED via SPI using fbtft staging driver.
35 +Load: dtoverlay=ssd1306-spi,<param>=<val>
36 +Params: speed SPI bus speed (default 10000000)
37 + rotate Display rotation (0, 90, 180 or 270; default 0)
38 + fps Delay between frame updates (default 25)
39 + debug Debug output level (0-7; default 0)
40 + dc_pin GPIO pin for D/C (default 24)
41 + reset_pin GPIO pin for RESET (default 25)
42 + height Display height (32 or 64; default 64)
46 Info: Configures the SuperAudioBoard sound card
47 Load: dtoverlay=superaudioboard,<param>=<val>
49 +++ b/arch/arm/boot/dts/overlays/ssd1306-spi-overlay.dts
52 + * Device Tree overlay for SSD1306 based SPI OLED display
60 + compatible = "brcm,bcm2835";
70 + target = <&spidev0>;
72 + status = "disabled";
77 + target = <&spidev1>;
79 + status = "disabled";
86 + ssd1306_pins: ssd1306_pins {
87 + brcm,pins = <25 24>;
88 + brcm,function = <1 1>; /* out out */
96 + /* needed to avoid dtc warning */
97 + #address-cells = <1>;
100 + ssd1306: ssd1306@0{
101 + compatible = "solomon,ssd1306";
103 + pinctrl-names = "default";
104 + pinctrl-0 = <&ssd1306_pins>;
106 + spi-max-frequency = <10000000>;
112 + reset-gpios = <&gpio 25 0>;
113 + dc-gpios = <&gpio 24 0>;
116 + solomon,height = <64>;
117 + solomon,width = <128>;
118 + solomon,page-offset = <0>;
124 + speed = <&ssd1306>,"spi-max-frequency:0";
125 + rotate = <&ssd1306>,"rotate:0";
126 + fps = <&ssd1306>,"fps:0";
127 + debug = <&ssd1306>,"debug:0";
128 + dc_pin = <&ssd1306>,"dc-gpios:4>";
129 + reset_pin = <&ssd1306>,"reset-gpios:4>";
130 + height = <&ssd1306>,"solomon,height:0>";