James h65 patch overlay renames (raspberrypi#1342)

* Rename pi3-miniuart-bt and pi3-disable-bt overlays

Names have changed in latest kernel.

* Update device-tree.md

Author: JamesH65

configuration/device-tree.md

@@ -819,7 +819,7 @@ This sets an (exclusive) limit to the loaded device tree. By default the device
 If non-zero, turn on some extra logging for the firmware's device tree processing.
 
 `enable_uart`
-Enable the primary/console UART (ttyS0 on a Pi 3, ttyAMA0 otherwise - unless swapped with an overlay such as pi3-miniuart-bt). If the primary UART is ttyAMA0 then enable_uart defaults to 1 (enabled), otherwise it defaults to 0 (disabled). This is because it is necessary to stop the core frequency from changing which would make ttyS0 unusable, so `enable_uart=1` implies core_freq=250 (unless force_turbo=1). In some cases this is a performance hit, so it is off by default. More details on UARTs can be found [here](uart.md)
+Enable the primary/console UART (ttyS0 on a Pi 3, ttyAMA0 otherwise - unless swapped with an overlay such as miniuart-bt). If the primary UART is ttyAMA0 then enable_uart defaults to 1 (enabled), otherwise it defaults to 0 (disabled). This is because it is necessary to stop the core frequency from changing which would make ttyS0 unusable, so `enable_uart=1` implies core_freq=250 (unless force_turbo=1). In some cases this is a performance hit, so it is off by default. More details on UARTs can be found [here](uart.md)
 
 `overlay_prefix`
 Specifies a subdirectory/prefix from which to load overlays - defaults to "overlays/". Note the trailing "/". If desired you can add something after the final "/" to add a prefix to each file, although this is not likely to be needed.

configuration/uart.md

@@ -32,18 +32,18 @@ By default, the UART transmit and receive pins are on GPIO 14 and GPIO 15 respec
 
 ## UARTs and Device Tree
 
-Various UART Device Tree Overlay definitions can be found in the kernel github tree. The two most useful overlays are [`pi3-disable-bt`](https://github.com/raspberrypi/linux/blob/rpi-4.11.y/arch/arm/boot/dts/overlays/pi3-disable-bt-overlay.dts) and [`pi3-miniuart-bt`](https://github.com/raspberrypi/linux/blob/rpi-4.11.y/arch/arm/boot/dts/overlays/pi3-miniuart-bt-overlay.dts).
+Various UART Device Tree Overlay definitions can be found in the kernel github tree. The two most useful overlays are [`disable-bt`](https://github.com/raspberrypi/linux/blob/rpi-4.11.y/arch/arm/boot/dts/overlays/disable-bt-overlay.dts) and [`miniuart-bt`](https://github.com/raspberrypi/linux/blob/rpi-4.11.y/arch/arm/boot/dts/overlays/miniuart-bt-overlay.dts).
 
-`pi3-disable-bt` disables the Bluetooth device and restores UART0/ttyAMA0 to GPIOs 14 and 15. It is also necessary to disable the system service that initialises the modem so it doesn't use the UART: `sudo systemctl disable hciuart`.
+`disable-bt` disables the Bluetooth device and restores UART0/ttyAMA0 to GPIOs 14 and 15. It is also necessary to disable the system service that initialises the modem so it doesn't use the UART: `sudo systemctl disable hciuart`.
 
-`pi3-miniuart-bt` switches the Raspberry Pi 3 and Raspberry Pi Zero W Bluetooth function to use the mini UART (ttyS0), and restores UART0/ttyAMA0 to GPIOs 14 and 15. Note that this may reduce the maximum usable baudrate (see mini UART limitations below). 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 this case, use /dev/serial1 instead because it will always be correct. If cmdline.txt uses the alias serial0 to refer to the user-accessible port, the firmware will replace it with the appropriate port whether or not this overlay is used.
+`miniuart-bt` switches the Raspberry Pi 3 and Raspberry Pi Zero W Bluetooth function to use the mini UART (ttyS0), and restores UART0/ttyAMA0 to GPIOs 14 and 15. Note that this may reduce the maximum usable baudrate (see mini UART limitations below). 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 this case, use /dev/serial1 instead because it will always be correct. If cmdline.txt uses the alias serial0 to refer to the user-accessible port, the firmware will replace it with the appropriate port whether or not this overlay is used.
 
 There are other UART-specific overlays in the folder. Refer to `/boot/overlays/README` for details on Device Tree Overlays, or run `dtoverlay -h overlay-name` for descriptions and usage information.
 
 For full instructions on how to use Device Tree Overlays see [this page](device-tree.md). In brief, add a line to the `config.txt` file to enable Device Tree Overlays. Note that the `-overlay.dts` part of the filename is removed.
 ```
 ...
-dtoverlay=pi3-disable-bt
+dtoverlay=disable-bt
 ...
 ```
 ## Relevant differences between PL011 and mini UART