From f763209fb1c001b84b03ba86c72db7a7ae8fb441 Mon Sep 17 00:00:00 2001 From: Phil Elwell Date: Thu, 17 Mar 2016 10:16:16 +0000 Subject: [PATCH] pi3-miniuart-bt-overlay: Correct and clarify info Signed-off-by: Phil Elwell --- arch/arm/boot/dts/overlays/README | 6 ++++-- arch/arm/boot/dts/overlays/pi3-miniuart-bt-overlay.dts | 6 ++++-- 2 files changed, 8 insertions(+), 4 deletions(-) --- a/arch/arm/boot/dts/overlays/README +++ b/arch/arm/boot/dts/overlays/README @@ -511,8 +511,10 @@ Name: pi3-miniuart-bt Info: Switch Pi3 Bluetooth function to use the mini-UART (ttyS0) and restore UART0/ttyAMA0 over GPIOs 14 & 15. Note that this may reduce the maximum usable baudrate. - N.B. It is also necessary to edit /lib/systemd/system/hciuart.server - and replace ttyAMA0 with ttyS0. + N.B. It is also necessary to edit /lib/systemd/system/hciuart.service + and replace ttyAMA0 with ttyS0, unless you have a system with udev rules + that create /dev/serial0 and /dev/serial1, in which case use + /dev/serial1 instead because it will always be correct. Load: dtoverlay=pi3-miniuart-bt Params: --- a/arch/arm/boot/dts/overlays/pi3-miniuart-bt-overlay.dts +++ b/arch/arm/boot/dts/overlays/pi3-miniuart-bt-overlay.dts @@ -5,8 +5,10 @@ UART0/ttyAMA0 over GPIOs 14 & 15. Note that this may reduce the maximum usable baudrate. - It is also necessary to edit /lib/systemd/system/hciuart.server and - replace ttyAMA0 with ttyS0. + It is also necessary to edit /lib/systemd/system/hciuart.service and + replace ttyAMA0 with ttyS0, unless you have a system with udev rules + that create /dev/serial0 and /dev/serial1, in which case use /dev/serial1 + instead because it will always be correct. If cmdline.txt uses the alias serial0 to refer to the user-accessable port then the firmware will replace with the appropriate port whether or not