target/linux/bcm27xx/patches-4.19/950-0812-overlays-Add-ssd1306-spi-overlay-3440.patch

   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)
   5
   6 Add an overlay for SSD1306 based OLED boards using SPI.
   7 This will load the staging fbtft driver.
   8
   9 Signed-off-by: Michael Kaplan <m.kaplan@evva.com>
  10 ---
  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
  16
  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) += \
  20         spi6-1cs.dtbo \
  21         spi6-2cs.dtbo \
  22         ssd1306.dtbo \
  23 +       ssd1306-spi.dtbo \
  24         superaudioboard.dtbo \
  25         sx150x.dtbo \
  26         tc358743.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
  31
  32
  33 +Name:   ssd1306-spi
  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)
  43 +
  44 +
  45  Name:   superaudioboard
  46  Info:   Configures the SuperAudioBoard sound card
  47  Load:   dtoverlay=superaudioboard,<param>=<val>
  48 --- /dev/null
  49 +++ b/arch/arm/boot/dts/overlays/ssd1306-spi-overlay.dts
  50 @@ -0,0 +1,82 @@
  51 +/*
  52 + * Device Tree overlay for SSD1306 based SPI OLED display
  53 + *
  54 + */
  55 +
  56 +/dts-v1/;
  57 +/plugin/;
  58 +
  59 +/ {
  60 +       compatible = "brcm,bcm2835";
  61 +
  62 +       fragment@0 {
  63 +               target = <&spi0>;
  64 +               __overlay__ {
  65 +                       status = "okay";
  66 +               };
  67 +       };
  68 +
  69 +       fragment@1 {
  70 +               target = <&spidev0>;
  71 +               __overlay__ {
  72 +                       status = "disabled";
  73 +               };
  74 +       };
  75 +
  76 +       fragment@2 {
  77 +               target = <&spidev1>;
  78 +               __overlay__ {
  79 +                       status = "disabled";
  80 +               };
  81 +       };
  82 +
  83 +       fragment@3 {
  84 +               target = <&gpio>;
  85 +               __overlay__ {
  86 +                       ssd1306_pins: ssd1306_pins {
  87 +                                brcm,pins = <25 24>;
  88 +                                brcm,function = <1 1>; /* out out */
  89 +                       };
  90 +               };
  91 +       };
  92 +
  93 +       fragment@4 {
  94 +               target = <&spi0>;
  95 +               __overlay__ {
  96 +                       /* needed to avoid dtc warning */
  97 +                       #address-cells = <1>;
  98 +                       #size-cells = <0>;
  99 +
 100 +                       ssd1306: ssd1306@0{
 101 +                               compatible = "solomon,ssd1306";
 102 +                               reg = <0>;
 103 +                               pinctrl-names = "default";
 104 +                               pinctrl-0 = <&ssd1306_pins>;
 105 +
 106 +                               spi-max-frequency = <10000000>;
 107 +                               bgr = <0>;
 108 +                               bpp = <1>;
 109 +                               rotate = <0>;
 110 +                               fps = <25>;
 111 +                               buswidth = <8>;
 112 +                               reset-gpios = <&gpio 25 0>;
 113 +                               dc-gpios = <&gpio 24 0>;
 114 +                               debug = <0>;
 115 +
 116 +                               solomon,height = <64>;
 117 +                               solomon,width = <128>;
 118 +                               solomon,page-offset = <0>;
 119 +                       };
 120 +               };
 121 +       };
 122 +
 123 +       __overrides__ {
 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>";
 131 +       };
 132 +};