target/linux/brcm2708/patches-4.19/950-0782-overlays-Make-mcp342x-run-time-compatible.patch

   1 From e650f4bfbe9a09e5b75d702884a8ba8d9df6ccdf Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.org>
   3 Date: Mon, 9 Dec 2019 12:32:20 +0000
   4 Subject: [PATCH] overlays: Make mcp342x run-time compatible
   5
   6 The order of processing of run-time overlays differs from that done by
   7 the firmware. This means that certain parameter processing techniques
   8 are not compatible with run-time use.  The mcp342x overlay is one such
   9 overlay, but it is easy to change the implementation without changing
  10 the interface.
  11
  12 See: https://www.raspberrypi.org/forums/viewtopic.php?f=107&t=258294
  13
  14 Signed-off-by: Phil Elwell <phil@raspberrypi.org>
  15 ---
  16  .../arm/boot/dts/overlays/mcp342x-overlay.dts | 133 ++++++++++++++----
  17  1 file changed, 102 insertions(+), 31 deletions(-)
  18
  19 --- a/arch/arm/boot/dts/overlays/mcp342x-overlay.dts
  20 +++ b/arch/arm/boot/dts/overlays/mcp342x-overlay.dts
  21 @@ -8,14 +8,15 @@
  22
  23         fragment@0 {
  24                 target = <&i2c1>;
  25 -               __overlay__ {
  26 +               __dormant__ {
  27                         #address-cells = <1>;
  28                         #size-cells = <0>;
  29
  30                         status = "okay";
  31
  32 -                       mcp342x: mcp@68 {
  33 +                       mcp3421: mcp@68 {
  34                                 reg = <0x68>;
  35 +                               compatible = "microchip,mcp3421";
  36
  37                                 status = "okay";
  38                         };
  39 @@ -23,71 +24,141 @@
  40         };
  41
  42         fragment@1 {
  43 -               target = <&mcp342x>;
  44 +               target = <&i2c1>;
  45                 __dormant__ {
  46 -                       compatible = "microchip,mcp3421";
  47 +                       #address-cells = <1>;
  48 +                       #size-cells = <0>;
  49 +
  50 +                       status = "okay";
  51 +
  52 +                       mcp3422: mcp@68 {
  53 +                               reg = <0x68>;
  54 +                               compatible = "microchip,mcp3422";
  55 +
  56 +                               status = "okay";
  57 +                       };
  58                 };
  59         };
  60
  61         fragment@2 {
  62 -               target = <&mcp342x>;
  63 +               target = <&i2c1>;
  64                 __dormant__ {
  65 -                       compatible = "microchip,mcp3422";
  66 +                       #address-cells = <1>;
  67 +                       #size-cells = <0>;
  68 +
  69 +                       status = "okay";
  70 +
  71 +                       mcp3423: mcp@68 {
  72 +                               reg = <0x68>;
  73 +                               compatible = "microchip,mcp3423";
  74 +
  75 +                               status = "okay";
  76 +                       };
  77                 };
  78         };
  79
  80         fragment@3 {
  81 -               target = <&mcp342x>;
  82 +               target = <&i2c1>;
  83                 __dormant__ {
  84 -                       compatible = "microchip,mcp3423";
  85 +                       #address-cells = <1>;
  86 +                       #size-cells = <0>;
  87 +
  88 +                       status = "okay";
  89 +
  90 +                       mcp3424: mcp@68 {
  91 +                               reg = <0x68>;
  92 +                               compatible = "microchip,mcp3424";
  93 +
  94 +                               status = "okay";
  95 +                       };
  96                 };
  97         };
  98
  99         fragment@4 {
 100 -               target = <&mcp342x>;
 101 +               target = <&i2c1>;
 102                 __dormant__ {
 103 -                       compatible = "microchip,mcp3424";
 104 +                       #address-cells = <1>;
 105 +                       #size-cells = <0>;
 106 +
 107 +                       status = "okay";
 108 +
 109 +                       mcp3425: mcp@68 {
 110 +                               reg = <0x68>;
 111 +                               compatible = "microchip,mcp3425","mcp3425";
 112 +
 113 +                               status = "okay";
 114 +                       };
 115                 };
 116         };
 117
 118         fragment@5 {
 119 -               target = <&mcp342x>;
 120 +               target = <&i2c1>;
 121                 __dormant__ {
 122 -                       compatible = "microchip,mcp3425";
 123 +                       #address-cells = <1>;
 124 +                       #size-cells = <0>;
 125 +
 126 +                       status = "okay";
 127 +
 128 +                       mcp3426: mcp@68 {
 129 +                               reg = <0x68>;
 130 +                               compatible = "microchip,mcp3426";
 131 +
 132 +                               status = "okay";
 133 +                       };
 134                 };
 135         };
 136
 137         fragment@6 {
 138 -               target = <&mcp342x>;
 139 +               target = <&i2c1>;
 140                 __dormant__ {
 141 -                       compatible = "microchip,mcp3426";
 142 +                       #address-cells = <1>;
 143 +                       #size-cells = <0>;
 144 +
 145 +                       status = "okay";
 146 +
 147 +                       mcp3427: mcp@68 {
 148 +                               reg = <0x68>;
 149 +                               compatible = "microchip,mcp3427";
 150 +
 151 +                               status = "okay";
 152 +                       };
 153                 };
 154         };
 155
 156         fragment@7 {
 157 -               target = <&mcp342x>;
 158 +               target = <&i2c1>;
 159                 __dormant__ {
 160 -                       compatible = "microchip,mcp3427";
 161 -               };
 162 -       };
 163 +                       #address-cells = <1>;
 164 +                       #size-cells = <0>;
 165
 166 -       fragment@8 {
 167 -               target = <&mcp342x>;
 168 -               __dormant__ {
 169 -                       compatible = "microchip,mcp3428";
 170 +                       status = "okay";
 171 +
 172 +                       mcp3428: mcp@68 {
 173 +                               reg = <0x68>;
 174 +                               compatible = "microchip,mcp3428";
 175 +
 176 +                               status = "okay";
 177 +                       };
 178                 };
 179         };
 180
 181         __overrides__ {
 182 -               addr = <&mcp342x>,"reg:0";
 183 -               mcp3421 = <0>,"=1";
 184 -               mcp3422 = <0>,"=2";
 185 -               mcp3423 = <0>,"=3";
 186 -               mcp3424 = <0>,"=4";
 187 -               mcp3425 = <0>,"=5";
 188 -               mcp3426 = <0>,"=6";
 189 -               mcp3427 = <0>,"=7";
 190 -               mcp3428 = <0>,"=8";
 191 +               addr = <&mcp3421>,"reg:0",
 192 +                      <&mcp3422>,"reg:0",
 193 +                      <&mcp3423>,"reg:0",
 194 +                      <&mcp3424>,"reg:0",
 195 +                      <&mcp3425>,"reg:0",
 196 +                      <&mcp3426>,"reg:0",
 197 +                      <&mcp3427>,"reg:0",
 198 +                      <&mcp3428>,"reg:0";
 199 +               mcp3421 = <0>,"=0";
 200 +               mcp3422 = <0>,"=1";
 201 +               mcp3423 = <0>,"=2";
 202 +               mcp3424 = <0>,"=3";
 203 +               mcp3425 = <0>,"=4";
 204 +               mcp3426 = <0>,"=5";
 205 +               mcp3427 = <0>,"=6";
 206 +               mcp3428 = <0>,"=7";
 207         };
 208  };
 209