target/linux/brcm2708/patches-4.4/0414-Add-critical-information-for-getting-pi3-miniuart-bt.patch

   1 From c9b8a3517364a417cf3c7bbfb051e3155d2ec99a Mon Sep 17 00:00:00 2001
   2 From: David Lechner <david@lechnology.com>
   3 Date: Mon, 27 Jun 2016 22:52:22 -0500
   4 Subject: [PATCH] Add critical information for getting pi3-miniuart-bt overlay
   5  to work
   6
   7 Bluetooth on RPi 3 using uart1 will not work without setting core_freq=250 in config.txt. This is not
   8 documented anywhere, so this seems like a good place to start.
   9 ---
  10  arch/arm/boot/dts/overlays/README | 4 +++-
  11  1 file changed, 3 insertions(+), 1 deletion(-)
  12
  13 --- a/arch/arm/boot/dts/overlays/README
  14 +++ b/arch/arm/boot/dts/overlays/README
  15 @@ -691,7 +691,9 @@ Info:   Switch Pi3 Bluetooth function to
  16          N.B. It is also necessary to edit /lib/systemd/system/hciuart.service
  17          and replace ttyAMA0 with ttyS0, unless you have a system with udev rules
  18          that create /dev/serial0 and /dev/serial1, in which case use
  19 -        /dev/serial1 instead because it will always be correct.
  20 +        /dev/serial1 instead because it will always be correct. Furthermore,
  21 +        you must also set core_freq=250 in config.txt or the miniuart will not
  22 +        work.
  23  Load:   dtoverlay=pi3-miniuart-bt
  24  Params: <None>
  25