From 32a85be60c722eff17ccade5d3e12971aad15f61 Mon Sep 17 00:00:00 2001
From: Alex Kurichenko <oleksandr.kurichenko@deluxe.com>
Date: Tue, 1 Jun 2021 01:53:47 +0300
Subject: [PATCH] overlays: Add ssd1331-spi support for OLED screen
Signed-off-by: Alex Kurichenko <oleksandr.kurichenko@deluxe.com>
---
arch/arm/boot/dts/overlays/Makefile | 1 +
arch/arm/boot/dts/overlays/README | 11 +++
.../boot/dts/overlays/ssd1331-spi-overlay.dts | 83 +++++++++++++++++++
3 files changed, 95 insertions(+)
create mode 100644 arch/arm/boot/dts/overlays/ssd1331-spi-overlay.dts
--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -196,6 +196,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
spi6-2cs.dtbo \
ssd1306.dtbo \
ssd1306-spi.dtbo \
+ ssd1331-spi.dtbo \
ssd1351-spi.dtbo \
superaudioboard.dtbo \
sx150x.dtbo \
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -3015,6 +3015,17 @@ Params: speed SPI bus
height Display height (32 or 64; default 64)
+Name: ssd1331-spi
+Info: Overlay for SSD1331 OLED via SPI using fbtft staging driver.
+Load: dtoverlay=ssd1331-spi,<param>=<val>
+Params: speed SPI bus speed (default 4500000)
+ rotate Display rotation (0, 90, 180 or 270; default 0)
+ fps Delay between frame updates (default 25)
+ debug Debug output level (0-7; default 0)
+ dc_pin GPIO pin for D/C (default 24)
+ reset_pin GPIO pin for RESET (default 25)
+
+
Name: ssd1351-spi
Info: Overlay for SSD1351 OLED via SPI using fbtft staging driver.
Load: dtoverlay=ssd1351-spi,<param>=<val>
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/ssd1331-spi-overlay.dts
@@ -0,0 +1,83 @@
+/*
+ * Device Tree overlay for SSD1331 based SPI OLED display
+ *
+ */
+
+/dts-v1/;
+/plugin/;
+
+/ {
+ compatible = "brcm,bcm2835";
+
+ fragment@0 {
+ target = <&spi0>;
+ __overlay__ {
+ status = "okay";
+ };
+ };
+
+ fragment@1 {
+ target = <&spidev0>;
+ __overlay__ {
+ status = "disabled";
+ };
+ };
+
+ fragment@2 {
+ target = <&spidev1>;
+ __overlay__ {
+ status = "disabled";
+ };
+ };
+
+ fragment@3 {
+ target = <&gpio>;
+ __overlay__ {
+ ssd1331_pins: ssd1331_pins {
+ brcm,pins = <25 24>;
+ brcm,function = <1 1>; /* out out */
+ };
+ };
+ };
+
+ fragment@4 {
+ target = <&spi0>;
+ __overlay__ {
+ /* needed to avoid dtc warning */
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ ssd1331: ssd1331@0{
+ compatible = "solomon,ssd1331";
+ reg = <0>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&ssd1331_pins>;
+
+ spi-max-frequency = <4500000>;
+ bgr = <0>;
+ bpp = <16>;
+ rotate = <0>;
+ fps = <25>;
+ buswidth = <8>;
+ reset-gpios = <&gpio 25 1>;
+ dc-gpios = <&gpio 24 0>;
+ debug = <0>;
+
+ solomon,height = <64>;
+ solomon,width = <96>;
+ solomon,page-offset = <0>;
+ };
+ };
+ };
+
+ __overrides__ {
+ speed = <&ssd1331>,"spi-max-frequency:0";
+ rotate = <&ssd1331>,"rotate:0";
+ fps = <&ssd1331>,"fps:0";
+ debug = <&ssd1331>,"debug:0";
+ dc_pin = <&ssd1331>,"dc-gpios:4",
+ <&ssd1331_pins>,"brcm,pins:4";
+ reset_pin = <&ssd1331>,"reset-gpios:4",
+ <&ssd1331_pins>,"brcm,pins:0";
+ };
+};