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133 lines
3.4 KiB
Diff
133 lines
3.4 KiB
Diff
From db048a80e63c66607b3bd73fa641802ec83bf166 Mon Sep 17 00:00:00 2001
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From: MikeDK <m.kaplan@evva.com>
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Date: Fri, 31 Jan 2020 10:57:21 +0100
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Subject: [PATCH] overlays: Add ssd1306-spi overlay (#3440)
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Add an overlay for SSD1306 based OLED boards using SPI.
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This will load the staging fbtft driver.
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Signed-off-by: Michael Kaplan <m.kaplan@evva.com>
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---
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arch/arm/boot/dts/overlays/Makefile | 1 +
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arch/arm/boot/dts/overlays/README | 12 +++
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.../boot/dts/overlays/ssd1306-spi-overlay.dts | 82 +++++++++++++++++++
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3 files changed, 95 insertions(+)
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create mode 100644 arch/arm/boot/dts/overlays/ssd1306-spi-overlay.dts
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--- a/arch/arm/boot/dts/overlays/Makefile
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+++ b/arch/arm/boot/dts/overlays/Makefile
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@@ -168,6 +168,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
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spi6-1cs.dtbo \
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spi6-2cs.dtbo \
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ssd1306.dtbo \
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+ ssd1306-spi.dtbo \
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superaudioboard.dtbo \
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sx150x.dtbo \
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tc358743.dtbo \
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--- a/arch/arm/boot/dts/overlays/README
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+++ b/arch/arm/boot/dts/overlays/README
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@@ -2428,6 +2428,18 @@ Params: address Location
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https://cdn-shop.adafruit.com/datasheets/SSD1306.pdf
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+Name: ssd1306-spi
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+Info: Overlay for SSD1306 OLED via SPI using fbtft staging driver.
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+Load: dtoverlay=ssd1306-spi,<param>=<val>
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+Params: speed SPI bus speed (default 10000000)
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+ rotate Display rotation (0, 90, 180 or 270; default 0)
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+ fps Delay between frame updates (default 25)
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+ debug Debug output level (0-7; default 0)
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+ dc_pin GPIO pin for D/C (default 24)
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+ reset_pin GPIO pin for RESET (default 25)
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+ height Display height (32 or 64; default 64)
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+
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+
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Name: superaudioboard
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Info: Configures the SuperAudioBoard sound card
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Load: dtoverlay=superaudioboard,<param>=<val>
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--- /dev/null
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+++ b/arch/arm/boot/dts/overlays/ssd1306-spi-overlay.dts
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@@ -0,0 +1,82 @@
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+/*
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+ * Device Tree overlay for SSD1306 based SPI OLED display
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+ *
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+ */
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+
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+/dts-v1/;
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+/plugin/;
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+
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+/ {
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+ compatible = "brcm,bcm2835";
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+
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+ fragment@0 {
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+ target = <&spi0>;
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+ __overlay__ {
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+ status = "okay";
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+ };
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+ };
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+
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+ fragment@1 {
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+ target = <&spidev0>;
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+ __overlay__ {
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+ status = "disabled";
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+ };
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+ };
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+
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+ fragment@2 {
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+ target = <&spidev1>;
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+ __overlay__ {
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+ status = "disabled";
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+ };
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+ };
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+
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+ fragment@3 {
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+ target = <&gpio>;
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+ __overlay__ {
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+ ssd1306_pins: ssd1306_pins {
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+ brcm,pins = <25 24>;
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+ brcm,function = <1 1>; /* out out */
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+ };
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+ };
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+ };
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+
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+ fragment@4 {
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+ target = <&spi0>;
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+ __overlay__ {
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+ /* needed to avoid dtc warning */
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+
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+ ssd1306: ssd1306@0{
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+ compatible = "solomon,ssd1306";
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+ reg = <0>;
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+ pinctrl-names = "default";
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+ pinctrl-0 = <&ssd1306_pins>;
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+
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+ spi-max-frequency = <10000000>;
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+ bgr = <0>;
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+ bpp = <1>;
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+ rotate = <0>;
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+ fps = <25>;
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+ buswidth = <8>;
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+ reset-gpios = <&gpio 25 0>;
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+ dc-gpios = <&gpio 24 0>;
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+ debug = <0>;
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+
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+ solomon,height = <64>;
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+ solomon,width = <128>;
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+ solomon,page-offset = <0>;
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+ };
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+ };
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+ };
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+
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+ __overrides__ {
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+ speed = <&ssd1306>,"spi-max-frequency:0";
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+ rotate = <&ssd1306>,"rotate:0";
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+ fps = <&ssd1306>,"fps:0";
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+ debug = <&ssd1306>,"debug:0";
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+ dc_pin = <&ssd1306>,"dc-gpios:4>";
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+ reset_pin = <&ssd1306>,"reset-gpios:4>";
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+ height = <&ssd1306>,"solomon,height:0>";
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+ };
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+};
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