target/linux/brcm2708/patches-4.14/950-0429-overlays-add-overrides-for-PoE-HAT-fan-control.patch

   1 From f7469d4973136acff2537c323a5377c217333bc8 Mon Sep 17 00:00:00 2001
   2 From: Serge Schneider <serge@raspberrypi.org>
   3 Date: Tue, 2 Oct 2018 17:13:48 +0100
   4 Subject: [PATCH 429/454] overlays: add overrides for PoE HAT fan control
   5
   6 Signed-off-by: Serge Schneider <serge@raspberrypi.org>
   7 ---
   8  arch/arm/boot/dts/overlays/README              | 13 ++++++++++---
   9  arch/arm/boot/dts/overlays/rpi-poe-overlay.dts | 10 ++++++++++
  10  2 files changed, 20 insertions(+), 3 deletions(-)
  11
  12 --- a/arch/arm/boot/dts/overlays/README
  13 +++ b/arch/arm/boot/dts/overlays/README
  14 @@ -1596,9 +1596,16 @@ Params: touchscreen-size-x      Touchscr
  15
  16
  17  Name:   rpi-poe
  18 -Info:   Raspberry Pi POE HAT
  19 -Load:   dtoverlay=rpi-poe
  20 -Params: <None>
  21 +Info:   Raspberry Pi PoE HAT fan
  22 +Load:   dtoverlay=rpi-poe,<param>[=<val>]
  23 +Params: poe_fan_temp0           Temperature (in millicelcius) at which the fan
  24 +                                turns on (default 50000)
  25 +        poe_fan_temp0_hyst      Temperature delta (in millicelcius) at which
  26 +                                the fan turns off (default 5000)
  27 +        poe_fan_temp1           Temperature (in millicelcius) at which the fan
  28 +                                speeds up (default 55000)
  29 +        poe_fan_temp1_hyst      Temperature delta (in millicelcius) at which
  30 +                                the fan slows down (default 5000)
  31
  32
  33  Name:   rpi-proto
  34 --- a/arch/arm/boot/dts/overlays/rpi-poe-overlay.dts
  35 +++ b/arch/arm/boot/dts/overlays/rpi-poe-overlay.dts
  36 @@ -50,4 +50,14 @@
  37                         };
  38                 };
  39         };
  40 +
  41 +       fragment@2 {
  42 +               target-path = "/__overrides__";
  43 +               __overlay__ {
  44 +                       poe_fan_temp0 =         <&trip0>,"temperature:0";
  45 +                       poe_fan_temp0_hyst =    <&trip0>,"hysteresis:0";
  46 +                       poe_fan_temp1 =         <&trip1>,"temperature:0";
  47 +                       poe_fan_temp1_hyst =    <&trip1>,"hysteresis:0";
  48 +               };
  49 +       };
  50  };