target/linux/bcm27xx/patches-5.10/950-0625-overlays-Add-ssd1331-spi-support-for-OLED-screen.patch

   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
   5
   6 Signed-off-by: Alex Kurichenko <oleksandr.kurichenko@deluxe.com>
   7 ---
   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
  13
  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) += \
  17         spi6-2cs.dtbo \
  18         ssd1306.dtbo \
  19         ssd1306-spi.dtbo \
  20 +       ssd1331-spi.dtbo \
  21         ssd1351-spi.dtbo \
  22         superaudioboard.dtbo \
  23         sx150x.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)
  28
  29
  30 +Name:   ssd1331-spi
  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)
  39 +
  40 +
  41  Name:   ssd1351-spi
  42  Info:   Overlay for SSD1351 OLED via SPI using fbtft staging driver.
  43  Load:   dtoverlay=ssd1351-spi,<param>=<val>
  44 --- /dev/null
  45 +++ b/arch/arm/boot/dts/overlays/ssd1331-spi-overlay.dts
  46 @@ -0,0 +1,83 @@
  47 +/*
  48 + * Device Tree overlay for SSD1331 based SPI OLED display
  49 + *
  50 + */
  51 +
  52 +/dts-v1/;
  53 +/plugin/;
  54 +
  55 +/ {
  56 +        compatible = "brcm,bcm2835";
  57 +
  58 +        fragment@0 {
  59 +                target = <&spi0>;
  60 +                __overlay__ {
  61 +                        status = "okay";
  62 +                };
  63 +        };
  64 +
  65 +        fragment@1 {
  66 +                target = <&spidev0>;
  67 +                __overlay__ {
  68 +                        status = "disabled";
  69 +                };
  70 +        };
  71 +
  72 +        fragment@2 {
  73 +                target = <&spidev1>;
  74 +                __overlay__ {
  75 +                        status = "disabled";
  76 +                };
  77 +        };
  78 +
  79 +        fragment@3 {
  80 +                target = <&gpio>;
  81 +                __overlay__ {
  82 +                        ssd1331_pins: ssd1331_pins {
  83 +                                brcm,pins = <25 24>;
  84 +                                brcm,function = <1 1>; /* out out */
  85 +                        };
  86 +                };
  87 +        };
  88 +
  89 +        fragment@4 {
  90 +                target = <&spi0>;
  91 +                __overlay__ {
  92 +                        /* needed to avoid dtc warning */
  93 +                        #address-cells = <1>;
  94 +                        #size-cells = <0>;
  95 +
  96 +                        ssd1331: ssd1331@0{
  97 +                                compatible = "solomon,ssd1331";
  98 +                                reg = <0>;
  99 +                                pinctrl-names = "default";
 100 +                                pinctrl-0 = <&ssd1331_pins>;
 101 +
 102 +                                spi-max-frequency = <4500000>;
 103 +                                bgr = <0>;
 104 +                                bpp = <16>;
 105 +                                rotate = <0>;
 106 +                                fps = <25>;
 107 +                                buswidth = <8>;
 108 +                                reset-gpios = <&gpio 25 1>;
 109 +                                dc-gpios = <&gpio 24 0>;
 110 +                                debug = <0>;
 111 +
 112 +                                solomon,height = <64>;
 113 +                                solomon,width = <96>;
 114 +                                solomon,page-offset = <0>;
 115 +                        };
 116 +                };
 117 +        };
 118 +
 119 +        __overrides__ {
 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";
 128 +        };
 129 +};