target/linux/bcm27xx/patches-5.4/950-0988-overlays-Add-ghost-amp-overlay.patch

   1 From 96f25d50e2352922e16ae74bb16fd8b6985f0f66 Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.com>
   3 Date: Wed, 30 Sep 2020 12:17:48 +0100
   4 Subject: [PATCH] overlays: Add ghost-amp overlay
   5
   6 Add an overlay for the Ghost amplifier.
   7
   8 Signed-off-by: Phil Elwell <phil@raspberrypi.com>
   9 ---
  10  arch/arm/boot/dts/overlays/Makefile           |   1 +
  11  arch/arm/boot/dts/overlays/README             |   7 ++
  12  .../boot/dts/overlays/ghost-amp-overlay.dts   | 119 ++++++++++++++++++
  13  3 files changed, 127 insertions(+)
  14  create mode 100644 arch/arm/boot/dts/overlays/ghost-amp-overlay.dts
  15
  16 --- a/arch/arm/boot/dts/overlays/Makefile
  17 +++ b/arch/arm/boot/dts/overlays/Makefile
  18 @@ -45,6 +45,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
  19         exc3000.dtbo \
  20         fe-pi-audio.dtbo \
  21         fsm-demo.dtbo \
  22 +       ghost-amp.dtbo \
  23         goodix.dtbo \
  24         googlevoicehat-soundcard.dtbo \
  25         gpio-fan.dtbo \
  26 --- a/arch/arm/boot/dts/overlays/README
  27 +++ b/arch/arm/boot/dts/overlays/README
  28 @@ -775,6 +775,13 @@ Load:   dtoverlay=fsm-demo,<param>=<val>
  29  Params: fsm_debug               Enable debug logging (default off)
  30
  31
  32 +Name:   ghost-amp
  33 +Info:   An overlay for the Ghost amplifier.
  34 +Load:   dtoverlay=ghost-amp,<param>=<val>
  35 +Params: fsm_debug               Enable debug logging of the GPIO FSM (default
  36 +                                off)
  37 +
  38 +
  39  Name:   goodix
  40  Info:   Enables I2C connected Goodix gt9271 multiple touch controller using
  41          GPIOs 4 and 17 (pins 7 and 11 on GPIO header) for interrupt and reset.
  42 --- /dev/null
  43 +++ b/arch/arm/boot/dts/overlays/ghost-amp-overlay.dts
  44 @@ -0,0 +1,119 @@
  45 +// Overlay for the PCM5122-based Ghost amplifier using gpio-fsm
  46 +/dts-v1/;
  47 +/plugin/;
  48 +
  49 +#include <dt-bindings/gpio/gpio-fsm.h>
  50 +
  51 +#define ENABLE GF_SW(0)
  52 +#define FAULT  GF_IP(0) // GPIO5
  53 +#define RELAY1 GF_OP(0) // GPIO22
  54 +#define RELAY2 GF_OP(1) // GPIO23
  55 +
  56 +/ {
  57 +       compatible = "brcm,bcm2835";
  58 +
  59 +       fragment@0 {
  60 +               target = <&i2s>;
  61 +               __overlay__ {
  62 +                       status = "okay";
  63 +               };
  64 +       };
  65 +
  66 +       fragment@1 {
  67 +               target = <&i2c1>;
  68 +               __overlay__ {
  69 +                       #address-cells = <1>;
  70 +                       #size-cells = <0>;
  71 +                       status = "okay";
  72 +
  73 +                       pcm5122@4c {
  74 +                               #sound-dai-cells = <0>;
  75 +                               compatible = "ti,pcm5122";
  76 +                               reg = <0x4c>;
  77 +                               AVDD-supply = <&vdd_3v3_reg>;
  78 +                               DVDD-supply = <&vdd_3v3_reg>;
  79 +                               CPVDD-supply = <&vdd_3v3_reg>;
  80 +                               status = "okay";
  81 +                       };
  82 +               };
  83 +       };
  84 +
  85 +       fragment@2 {
  86 +               target = <&sound>;
  87 +               iqaudio_dac: __overlay__ {
  88 +                       compatible = "iqaudio,iqaudio-dac";
  89 +                       i2s-controller = <&i2s>;
  90 +                       mute-gpios = <&amp 0 0>;
  91 +                       iqaudio-dac,auto-mute-amp;
  92 +                       status = "okay";
  93 +               };
  94 +       };
  95 +
  96 +       fragment@3 {
  97 +               target-path = "/";
  98 +               __overlay__ {
  99 +                       amp: ghost-amp {
 100 +                               compatible = "rpi,gpio-fsm";
 101 +
 102 +                               debug = <0>;
 103 +                               gpio-controller;
 104 +                               #gpio-cells = <2>;
 105 +                               num-soft-gpios = <1>;
 106 +                               gpio-line-names = "enable";
 107 +                               input-gpios  = <&gpio 5 1>;  // FAULT (active low)
 108 +                               output-gpios = <&gpio 22 0>, // RELAY1
 109 +                                              <&gpio 23 0>; // RELAY2
 110 +                               shutdown-timeout-ms = <1000>;
 111 +
 112 +                               amp_off {
 113 +                                       start_state;
 114 +                                       shutdown_state;
 115 +
 116 +                                       set = <RELAY2 0>,
 117 +                                             <RELAY1 0>;
 118 +                                       amp_on_1 = <ENABLE 1>;
 119 +                                       fault = <FAULT 1>;
 120 +                               };
 121 +
 122 +                               amp_on_1 {
 123 +                                       set = <RELAY1 1>;
 124 +                                       amp_on = <GF_DELAY 1500>;
 125 +                                       amp_off = <ENABLE 0>;
 126 +                                       fault = <FAULT 1>;
 127 +                               };
 128 +
 129 +                               amp_on {
 130 +                                       set = <RELAY2 1>;
 131 +                                       amp_off_wait = <ENABLE 0>;
 132 +                                       fault = <FAULT 1>;
 133 +                               };
 134 +
 135 +                               amp_off_wait {
 136 +                                       amp_off_1 = <GF_DELAY (30*60*1000)>,
 137 +                                                   <GF_SHUTDOWN 0>;
 138 +                                       amp_on = <ENABLE 1>;
 139 +                                       fault = <FAULT 1>;
 140 +                               };
 141 +
 142 +                               amp_off_1 {
 143 +                                       set = <RELAY2 0>;
 144 +                                       amp_on = <ENABLE 1>;
 145 +                                       amp_off = <GF_DELAY 100>;
 146 +                                       fault = <FAULT 1>;
 147 +                               };
 148 +
 149 +                               // Keep this a distinct state to prevent
 150 +                               // changes and for the diagnostic output
 151 +                               fault {
 152 +                                       set = <RELAY2 0>,
 153 +                                             <RELAY1 0>;
 154 +                                       shutdown_state;
 155 +                               };
 156 +                       };
 157 +               };
 158 +       };
 159 +
 160 +       __overrides__ {
 161 +               fsm_debug = <&amp>,"debug:0";
 162 +       };
 163 +};