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From f763209fb1c001b84b03ba86c72db7a7ae8fb441 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Thu, 17 Mar 2016 10:16:16 +0000
Subject: [PATCH] pi3-miniuart-bt-overlay: Correct and clarify info
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
---
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: <None>
--- 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
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