target/linux/bcm27xx/patches-5.15/950-0661-dtoverlays-Add-option-for-PoE-HAT-to-use-Linux-I2C-i.patch

   1 From 7d4346817f31105ed07dd4e3e9fd2294c85a5fee Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.com>
   3 Date: Wed, 19 Jan 2022 17:29:13 +0000
   4 Subject: [PATCH] dtoverlays: Add option for PoE HAT to use Linux I2C
   5  instead of FW.
   6
   7 Adds parameter "i2c" to use the PoE HAT I2C MFD driver to instantiate
   8 the PoE HAT drivers, instead of being off the firmware.
   9
  10 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
  11 ---
  12  arch/arm/boot/dts/overlays/README             |  4 ++
  13  .../arm/boot/dts/overlays/rpi-poe-overlay.dts | 62 +++++++++++++++----
  14  .../dts/overlays/rpi-poe-plus-overlay.dts     | 15 +++++
  15  3 files changed, 69 insertions(+), 12 deletions(-)
  16
  17 --- a/arch/arm/boot/dts/overlays/README
  18 +++ b/arch/arm/boot/dts/overlays/README
  19 @@ -2858,6 +2858,8 @@ Params: poe_fan_temp0           Temperat
  20                                  speeds up (default 55000)
  21          poe_fan_temp3_hyst      Temperature delta (in millicelcius) at which
  22                                  the fan slows down (default 5000)
  23 +        i2c                     Control the fan via Linux I2C drivers instead of
  24 +                                the firmware.
  25
  26
  27  Name:   rpi-poe-plus
  28 @@ -2879,6 +2881,8 @@ Params: poe_fan_temp0           Temperat
  29                                  speeds up (default 55000)
  30          poe_fan_temp3_hyst      Temperature delta (in millicelcius) at which
  31                                  the fan slows down (default 5000)
  32 +        i2c                     Control the fan via Linux I2C drivers instead of
  33 +                                the firmware.
  34
  35
  36  Name:   rpi-proto
  37 --- a/arch/arm/boot/dts/overlays/rpi-poe-overlay.dts
  38 +++ b/arch/arm/boot/dts/overlays/rpi-poe-overlay.dts
  39 @@ -8,16 +8,6 @@
  40         compatible = "brcm,bcm2835";
  41
  42         fragment@0 {
  43 -               target = <&firmware>;
  44 -               __overlay__ {
  45 -                       fwpwm: pwm {
  46 -                               compatible = "raspberrypi,firmware-poe-pwm";
  47 -                               #pwm-cells = <2>;
  48 -                       };
  49 -               };
  50 -       };
  51 -
  52 -       fragment@1 {
  53                 target-path = "/";
  54                 __overlay__ {
  55                         fan: pwm-fan {
  56 @@ -29,7 +19,7 @@
  57                 };
  58         };
  59
  60 -       fragment@2 {
  61 +       fragment@1 {
  62                 target = <&cpu_thermal>;
  63                 __overlay__ {
  64                         trips {
  65 @@ -75,7 +65,7 @@
  66                 };
  67         };
  68
  69 -       fragment@3 {
  70 +       fragment@2 {
  71                 target-path = "/__overrides__";
  72                 __overlay__ {
  73                         poe_fan_temp0 =         <&trip0>,"temperature:0";
  74 @@ -89,6 +79,52 @@
  75                 };
  76         };
  77
  78 +       fragment@3 {
  79 +               target = <&firmware>;
  80 +               __overlay__ {
  81 +                       fwpwm: pwm {
  82 +                               compatible = "raspberrypi,firmware-poe-pwm";
  83 +                               #pwm-cells = <2>;
  84 +                       };
  85 +               };
  86 +       };
  87 +
  88 +       fragment@4 {
  89 +               target = <&i2c0>;
  90 +               __dormant__ {
  91 +                       #address-cells = <1>;
  92 +                       #size-cells = <0>;
  93 +                       status = "okay";
  94 +
  95 +                       poe_mfd: poe@51 {
  96 +                               compatible = "raspberrypi,poe-core";
  97 +                               reg = <0x51>;
  98 +                               status = "okay";
  99 +
 100 +                               poe_mfd_pwm: poe_pwm@f0 {
 101 +                                       compatible = "raspberrypi,poe-pwm";
 102 +                                       reg = <0xf0>;
 103 +                                       status = "okay";
 104 +                                       #pwm-cells = <2>;
 105 +                               };
 106 +                       };
 107 +               };
 108 +       };
 109 +
 110 +       fragment@5 {
 111 +               target = <&i2c0if>;
 112 +               __dormant__ {
 113 +                       status = "okay";
 114 +               };
 115 +       };
 116 +
 117 +       fragment@6 {
 118 +               target = <&i2c0mux>;
 119 +               __dormant__ {
 120 +                       status = "okay";
 121 +               };
 122 +       };
 123 +
 124         __overrides__ {
 125                 poe_fan_temp0 =         <&trip0>,"temperature:0";
 126                 poe_fan_temp0_hyst =    <&trip0>,"hysteresis:0";
 127 @@ -98,5 +134,7 @@
 128                 poe_fan_temp2_hyst =    <&trip2>,"hysteresis:0";
 129                 poe_fan_temp3 =         <&trip3>,"temperature:0";
 130                 poe_fan_temp3_hyst =    <&trip3>,"hysteresis:0";
 131 +               i2c =                   <0>, "-3+4+5+6",
 132 +                                       <&fan>,"pwms:0=",<&poe_mfd_pwm>;
 133         };
 134  };
 135 --- a/arch/arm/boot/dts/overlays/rpi-poe-plus-overlay.dts
 136 +++ b/arch/arm/boot/dts/overlays/rpi-poe-plus-overlay.dts
 137 @@ -16,6 +16,21 @@
 138                         };
 139                 };
 140         };
 141 +       fragment@11 {
 142 +               target = <&poe_mfd>;
 143 +               __dormant__ {
 144 +                       rpi-poe-power-supply@f2 {
 145 +                               compatible = "raspberrypi,rpi-poe-power-supply";
 146 +                               reg = <0xf2>;
 147 +                               status = "okay";
 148 +                       };
 149 +               };
 150 +       };
 151 +
 152 +       __overrides__ {
 153 +               i2c =   <0>, "-3+4+5+6-10+11",
 154 +                       <&fan>,"pwms:0=",<&poe_mfd_pwm>;
 155 +       };
 156  };
 157
 158  &fan {