target/linux/bcm27xx/patches-5.4/950-0987-overlays-Add-fsm-demo-overlay.patch

   1 From d27d1447e49bc6ffa92f787f7bc5c2eea29ba7d2 Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.com>
   3 Date: Wed, 30 Sep 2020 12:08:08 +0100
   4 Subject: [PATCH] overlays: Add fsm-demo overlay
   5
   6 fsm-demo demonstrates the usage of the gpio-fsm driver. It is
   7 designed to be used with a set of "traffic light" LEDs on GPIOs
   8 7, 8 and 25.
   9
  10 Signed-off-by: Phil Elwell <phil@raspberrypi.com>
  11 ---
  12  arch/arm/boot/dts/overlays/Makefile           |   1 +
  13  arch/arm/boot/dts/overlays/README             |   8 ++
  14  .../boot/dts/overlays/fsm-demo-overlay.dts    | 104 ++++++++++++++++++
  15  3 files changed, 113 insertions(+)
  16  create mode 100644 arch/arm/boot/dts/overlays/fsm-demo-overlay.dts
  17
  18 --- a/arch/arm/boot/dts/overlays/Makefile
  19 +++ b/arch/arm/boot/dts/overlays/Makefile
  20 @@ -44,6 +44,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
  21         enc28j60-spi2.dtbo \
  22         exc3000.dtbo \
  23         fe-pi-audio.dtbo \
  24 +       fsm-demo.dtbo \
  25         goodix.dtbo \
  26         googlevoicehat-soundcard.dtbo \
  27         gpio-fan.dtbo \
  28 --- a/arch/arm/boot/dts/overlays/README
  29 +++ b/arch/arm/boot/dts/overlays/README
  30 @@ -767,6 +767,14 @@ Load:   dtoverlay=fe-pi-audio
  31  Params: <None>
  32
  33
  34 +Name:   fsm-demo
  35 +Info:   A demonstration of the gpio-fsm driver. The GPIOs are chosen to work
  36 +        nicely with a "traffic-light" display of red, amber and green LEDs on
  37 +        GPIOs 7, 8 and 25 respectively.
  38 +Load:   dtoverlay=fsm-demo,<param>=<val>
  39 +Params: fsm_debug               Enable debug logging (default off)
  40 +
  41 +
  42  Name:   goodix
  43  Info:   Enables I2C connected Goodix gt9271 multiple touch controller using
  44          GPIOs 4 and 17 (pins 7 and 11 on GPIO header) for interrupt and reset.
  45 --- /dev/null
  46 +++ b/arch/arm/boot/dts/overlays/fsm-demo-overlay.dts
  47 @@ -0,0 +1,104 @@
  48 +// Demo overlay for the gpio-fsm driver
  49 +/dts-v1/;
  50 +/plugin/;
  51 +
  52 +#include <dt-bindings/gpio/gpio-fsm.h>
  53 +
  54 +#define BUTTON1 GF_IP(0)
  55 +#define BUTTON2 GF_SW(0)
  56 +#define RED   GF_OP(0) // GPIO7
  57 +#define AMBER GF_OP(1) // GPIO8
  58 +#define GREEN GF_OP(2) // GPIO25
  59 +
  60 +/{
  61 +       compatible = "brcm,bcm2835";
  62 +
  63 +       fragment@0 {
  64 +               target-path = "/";
  65 +               __overlay__ {
  66 +                       fsm_demo: fsm-demo {
  67 +                               compatible = "rpi,gpio-fsm";
  68 +
  69 +                               debug = <0>;
  70 +                               gpio-controller;
  71 +                               #gpio-cells = <2>;
  72 +                               num-soft-gpios = <1>;
  73 +                               gpio-line-names = "button2";
  74 +                               input-gpios  = <&gpio 6 1>;  // BUTTON1 (active-low)
  75 +                               output-gpios = <&gpio 7 0>,  // RED
  76 +                                              <&gpio 8 0>,  // AMBER
  77 +                                              <&gpio 25 0>; // GREEN
  78 +                               shutdown-timeout-ms = <2000>;
  79 +
  80 +                               start {
  81 +                                       start_state;
  82 +                                       set = <RED 1>, <AMBER 0>, <GREEN 0>;
  83 +                                       start2 = <GF_DELAY 250>;
  84 +                               };
  85 +
  86 +                               start2 {
  87 +                                       set = <RED 0>, <AMBER 1>;
  88 +                                       go = <GF_DELAY 250>;
  89 +                               };
  90 +
  91 +                               go {
  92 +                                       set = <RED 0>, <AMBER 0>, <GREEN 1>;
  93 +                                       ready_wait = <BUTTON1 0>;
  94 +                                       shutdown1 = <GF_SHUTDOWN 0>;
  95 +                               };
  96 +
  97 +                               ready_wait {
  98 +                                       // Clear the soft GPIO
  99 +                                       set = <BUTTON2 0>;
 100 +                                       ready = <GF_DELAY 1000>;
 101 +                                       shutdown1 = <GF_SHUTDOWN 0>;
 102 +                               };
 103 +
 104 +                               ready {
 105 +                                       stopping = <BUTTON1 1>, <BUTTON2 1>;
 106 +                                       shutdown1 = <GF_SHUTDOWN 0>;
 107 +                               };
 108 +
 109 +                               stopping {
 110 +                                       set = <GREEN 0>, <AMBER 1>;
 111 +                                       stopped = <GF_DELAY 1000>;
 112 +                               };
 113 +
 114 +                               stopped {
 115 +                                       set = <AMBER 0>, <RED 1>;
 116 +                                       get_set = <GF_DELAY 3000>;
 117 +                                       shutdown1 = <GF_SHUTDOWN 0>;
 118 +                               };
 119 +
 120 +                               get_set {
 121 +                                       set = <AMBER 1>;
 122 +                                       go = <GF_DELAY 1000>;
 123 +                               };
 124 +
 125 +                               shutdown1 {
 126 +                                       set = <RED 0>, <AMBER 0>, <GREEN 1>;
 127 +                                       shutdown2 = <GF_SHUTDOWN 250>;
 128 +                               };
 129 +
 130 +                               shutdown2 {
 131 +                                       set = <AMBER 1>, <GREEN 0>;
 132 +                                       shutdown3 = <GF_SHUTDOWN 250>;
 133 +                               };
 134 +
 135 +                               shutdown3 {
 136 +                                       set = <RED 1>, <AMBER 0>;
 137 +                                       shutdown4 = <GF_SHUTDOWN 250>;
 138 +                               };
 139 +
 140 +                               shutdown4 {
 141 +                                       shutdown_state;
 142 +                                       set = <RED 0>;
 143 +                               };
 144 +                       };
 145 +              };
 146 +        };
 147 +
 148 +       __overrides__ {
 149 +               fsm_debug = <&fsm_demo>,"debug:0";
 150 +       };
 151 +};