arch/arm/boot/dts/overlays/disable-bt-overlay.dts

   1 /dts-v1/;
   2 /plugin/;
   3
   4 /* Disable Bluetooth and restore UART0/ttyAMA0 over GPIOs 14 & 15.
   5    To disable the systemd service that initialises the modem so it doesn't use
   6    the UART:
   7
   8        sudo systemctl disable hciuart
   9 */
  10
  11 #include <dt-bindings/gpio/gpio.h>
  12
  13 /{
  14         compatible = "brcm,bcm2835";
  15
  16         fragment@0 {
  17                 target = <&uart1>;
  18                 __overlay__ {
  19                         status = "disabled";
  20                 };
  21         };
  22
  23         fragment@1 {
  24                 target = <&uart0>;
  25                 __overlay__ {
  26                         pinctrl-names = "default";
  27                         pinctrl-0 = <&uart0_pins>;
  28                         status = "okay";
  29                 };
  30         };
  31
  32         fragment@2 {
  33                 target = <&bt>;
  34                 __overlay__ {
  35                         status = "disabled";
  36                 };
  37         };
  38
  39         fragment@3 {
  40                 target = <&uart0_pins>;
  41                 __overlay__ {
  42                         brcm,pins;
  43                         brcm,function;
  44                         brcm,pull;
  45                 };
  46         };
  47
  48         fragment@4 {
  49                 target = <&bt_pins>;
  50                 __overlay__ {
  51                         brcm,pins;
  52                         brcm,function;
  53                         brcm,pull;
  54                 };
  55         };
  56
  57         fragment@5 {
  58                 target-path = "/aliases";
  59                 __overlay__ {
  60                         serial0 = "/soc/serial@7e201000";
  61                         serial1 = "/soc/serial@7e215040";
  62                 };
  63         };
  64 };