1 From 32a85be60c722eff17ccade5d3e12971aad15f61 Mon Sep 17 00:00:00 2001
2 From: Alex Kurichenko <oleksandr.kurichenko@deluxe.com>
3 Date: Tue, 1 Jun 2021 01:53:47 +0300
4 Subject: [PATCH] overlays: Add ssd1331-spi support for OLED screen
6 Signed-off-by: Alex Kurichenko <oleksandr.kurichenko@deluxe.com>
8 arch/arm/boot/dts/overlays/Makefile | 1 +
9 arch/arm/boot/dts/overlays/README | 11 +++
10 .../boot/dts/overlays/ssd1331-spi-overlay.dts | 83 +++++++++++++++++++
11 3 files changed, 95 insertions(+)
12 create mode 100644 arch/arm/boot/dts/overlays/ssd1331-spi-overlay.dts
14 --- a/arch/arm/boot/dts/overlays/Makefile
15 +++ b/arch/arm/boot/dts/overlays/Makefile
16 @@ -196,6 +196,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
22 superaudioboard.dtbo \
24 --- a/arch/arm/boot/dts/overlays/README
25 +++ b/arch/arm/boot/dts/overlays/README
26 @@ -3015,6 +3015,17 @@ Params: speed SPI bus
27 height Display height (32 or 64; default 64)
31 +Info: Overlay for SSD1331 OLED via SPI using fbtft staging driver.
32 +Load: dtoverlay=ssd1331-spi,<param>=<val>
33 +Params: speed SPI bus speed (default 4500000)
34 + rotate Display rotation (0, 90, 180 or 270; default 0)
35 + fps Delay between frame updates (default 25)
36 + debug Debug output level (0-7; default 0)
37 + dc_pin GPIO pin for D/C (default 24)
38 + reset_pin GPIO pin for RESET (default 25)
42 Info: Overlay for SSD1351 OLED via SPI using fbtft staging driver.
43 Load: dtoverlay=ssd1351-spi,<param>=<val>
45 +++ b/arch/arm/boot/dts/overlays/ssd1331-spi-overlay.dts
48 + * Device Tree overlay for SSD1331 based SPI OLED display
56 + compatible = "brcm,bcm2835";
66 + target = <&spidev0>;
68 + status = "disabled";
73 + target = <&spidev1>;
75 + status = "disabled";
82 + ssd1331_pins: ssd1331_pins {
83 + brcm,pins = <25 24>;
84 + brcm,function = <1 1>; /* out out */
92 + /* needed to avoid dtc warning */
93 + #address-cells = <1>;
97 + compatible = "solomon,ssd1331";
99 + pinctrl-names = "default";
100 + pinctrl-0 = <&ssd1331_pins>;
102 + spi-max-frequency = <4500000>;
108 + reset-gpios = <&gpio 25 1>;
109 + dc-gpios = <&gpio 24 0>;
112 + solomon,height = <64>;
113 + solomon,width = <96>;
114 + solomon,page-offset = <0>;
120 + speed = <&ssd1331>,"spi-max-frequency:0";
121 + rotate = <&ssd1331>,"rotate:0";
122 + fps = <&ssd1331>,"fps:0";
123 + debug = <&ssd1331>,"debug:0";
124 + dc_pin = <&ssd1331>,"dc-gpios:4",
125 + <&ssd1331_pins>,"brcm,pins:4";
126 + reset_pin = <&ssd1331>,"reset-gpios:4",
127 + <&ssd1331_pins>,"brcm,pins:0";