target/linux/brcm2708/patches-4.4/0171-BCM270X_DT-Add-pi3-disable-bt-overlay.patch

   1 From 42a9bb566fe376a1add4b3780c1b830f64500faa Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.org>
   3 Date: Wed, 2 Mar 2016 10:59:05 +0000
   4 Subject: [PATCH 171/180] BCM270X_DT: Add pi3-disable-bt overlay
   5
   6 Disable Bluetooth and restore UART0/ttyAMA0 over GPIOs 14 & 15. To disable
   7 the systemd service that initialises the modem so it doesn't use the UART:
   8
   9        sudo systemctl disable hciuart
  10
  11 Signed-off-by: Phil Elwell <phil@raspberrypi.org>
  12 ---
  13  arch/arm/boot/dts/overlays/Makefile                |  1 +
  14  arch/arm/boot/dts/overlays/README                  |  8 ++++
  15  .../boot/dts/overlays/pi3-disable-bt-overlay.dts   | 48 ++++++++++++++++++++++
  16  3 files changed, 57 insertions(+)
  17  create mode 100644 arch/arm/boot/dts/overlays/pi3-disable-bt-overlay.dts
  18
  19 --- a/arch/arm/boot/dts/overlays/Makefile
  20 +++ b/arch/arm/boot/dts/overlays/Makefile
  21 @@ -39,6 +39,7 @@ dtb-$(RPI_DT_OVERLAYS) += mcp2515-can0-o
  22  dtb-$(RPI_DT_OVERLAYS) += mcp2515-can1-overlay.dtb
  23  dtb-$(RPI_DT_OVERLAYS) += mmc-overlay.dtb
  24  dtb-$(RPI_DT_OVERLAYS) += mz61581-overlay.dtb
  25 +dtb-$(RPI_DT_OVERLAYS) += pi3-disable-bt-overlay.dtb
  26  dtb-$(RPI_DT_OVERLAYS) += piscreen-overlay.dtb
  27  dtb-$(RPI_DT_OVERLAYS) += piscreen2r-overlay.dtb
  28  dtb-$(RPI_DT_OVERLAYS) += pitft28-capacitive-overlay.dtb
  29 --- a/arch/arm/boot/dts/overlays/README
  30 +++ b/arch/arm/boot/dts/overlays/README
  31 @@ -496,6 +496,14 @@ Params: speed                   Display
  32  [ The pcf8563-rtc overlay has been deleted. See i2c-rtc. ]
  33
  34
  35 +Name:   pi3-disable-bt
  36 +Info:   Disable Pi3 Bluetooth and restore UART0/ttyAMA0 over GPIOs 14 & 15
  37 +        N.B. To disable the systemd service that initialises the modem so it
  38 +        doesn't use the UART, use 'sudo systemctl disable hciuart'.
  39 +Load:   dtoverlay=pi3-disable-bt
  40 +Params: <None>
  41 +
  42 +
  43  Name:   piscreen
  44  Info:   PiScreen display by OzzMaker.com
  45  Load:   dtoverlay=piscreen,<param>=<val>
  46 --- /dev/null
  47 +++ b/arch/arm/boot/dts/overlays/pi3-disable-bt-overlay.dts
  48 @@ -0,0 +1,48 @@
  49 +/dts-v1/;
  50 +/plugin/;
  51 +
  52 +/* Disable Bluetooth and restore UART0/ttyAMA0 over GPIOs 14 & 15.
  53 +   To disable the systemd service that initialises the modem so it doesn't use
  54 +   the UART:
  55 +
  56 +       sudo systemctl disable hciuart
  57 +*/
  58 +
  59 +/{
  60 +       compatible = "brcm,bcm2708";
  61 +
  62 +       fragment@0 {
  63 +               target = <&uart1>;
  64 +               __overlay__ {
  65 +                       status = "disabled";
  66 +               };
  67 +       };
  68 +
  69 +       fragment@1 {
  70 +               target = <&uart0>;
  71 +               __overlay__ {
  72 +                       pinctrl-names = "default";
  73 +                       pinctrl-0 = <&uart0_pins>;
  74 +                       status = "okay";
  75 +               };
  76 +       };
  77 +
  78 +       fragment@2 {
  79 +               target = <&gpio>;
  80 +               __overlay__ {
  81 +                       uart0_pins: uart0_pins {
  82 +                               brcm,pins = <14 15>;
  83 +                               brcm,function = <4>; /* alt0 */
  84 +                               brcm,pull = <0 2>;
  85 +                       };
  86 +               };
  87 +       };
  88 +
  89 +       fragment@3 {
  90 +               target-path = "/aliases";
  91 +               __overlay__ {
  92 +                       serial0 = "/soc/uart@7e201000";
  93 +                       serial1 = "/soc/uart@7e215040";
  94 +               };
  95 +       };
  96 +};