diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0164-BCM270X_DT-Add-pi3-miniuart-bt-DT-overlay.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0164-BCM270X_DT-Add-pi3-miniuart-bt-DT-overlay.patch | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0164-BCM270X_DT-Add-pi3-miniuart-bt-DT-overlay.patch b/target/linux/brcm2708/patches-4.4/0164-BCM270X_DT-Add-pi3-miniuart-bt-DT-overlay.patch new file mode 100644 index 0000000..e8c57c7 --- /dev/null +++ b/target/linux/brcm2708/patches-4.4/0164-BCM270X_DT-Add-pi3-miniuart-bt-DT-overlay.patch @@ -0,0 +1,117 @@ +From fd6395774b0b0adfafcb3ef11c5055f85e8896dd Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.org> +Date: Mon, 7 Mar 2016 09:53:03 +0000 +Subject: [PATCH 164/304] BCM270X_DT: Add pi3-miniuart-bt DT overlay + +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. + +It is also necessary to edit /lib/systemd/system/hciuart.server and +replace ttyAMA0 with ttyS0. + +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 +this overlay is used. + +Signed-off-by: Phil Elwell <phil@raspberrypi.org> +--- + arch/arm/boot/dts/overlays/Makefile | 1 + + arch/arm/boot/dts/overlays/README | 10 ++++ + .../boot/dts/overlays/pi3-miniuart-bt-overlay.dts | 61 ++++++++++++++++++++++ + 3 files changed, 72 insertions(+) + create mode 100644 arch/arm/boot/dts/overlays/pi3-miniuart-bt-overlay.dts + +--- a/arch/arm/boot/dts/overlays/Makefile ++++ b/arch/arm/boot/dts/overlays/Makefile +@@ -40,6 +40,7 @@ dtb-$(RPI_DT_OVERLAYS) += mcp2515-can1-o + dtb-$(RPI_DT_OVERLAYS) += mmc-overlay.dtb + dtb-$(RPI_DT_OVERLAYS) += mz61581-overlay.dtb + dtb-$(RPI_DT_OVERLAYS) += pi3-disable-bt-overlay.dtb ++dtb-$(RPI_DT_OVERLAYS) += pi3-miniuart-bt-overlay.dtb + dtb-$(RPI_DT_OVERLAYS) += piscreen-overlay.dtb + dtb-$(RPI_DT_OVERLAYS) += piscreen2r-overlay.dtb + dtb-$(RPI_DT_OVERLAYS) += pitft28-capacitive-overlay.dtb +--- a/arch/arm/boot/dts/overlays/README ++++ b/arch/arm/boot/dts/overlays/README +@@ -504,6 +504,16 @@ Load: dtoverlay=pi3-disable-bt + Params: <None> + + ++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. ++Load: dtoverlay=pi3-miniuart-bt ++Params: <None> ++ ++ + Name: piscreen + Info: PiScreen display by OzzMaker.com + Load: dtoverlay=piscreen,<param>=<val> +--- /dev/null ++++ b/arch/arm/boot/dts/overlays/pi3-miniuart-bt-overlay.dts +@@ -0,0 +1,61 @@ ++/dts-v1/; ++/plugin/; ++ ++/* 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. ++ ++ It is also necessary to edit /lib/systemd/system/hciuart.server and ++ replace ttyAMA0 with ttyS0. ++ ++ 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 ++ this overlay is used. ++*/ ++ ++/{ ++ compatible = "brcm,bcm2708"; ++ ++ fragment@0 { ++ target = <&uart0>; ++ __overlay__ { ++ pinctrl-names = "default"; ++ pinctrl-0 = <&uart0_pins>; ++ status = "okay"; ++ }; ++ }; ++ ++ fragment@1 { ++ target = <&uart1>; ++ __overlay__ { ++ pinctrl-names = "default"; ++ pinctrl-0 = <&uart1_pins>; ++ status = "okay"; ++ }; ++ }; ++ ++ fragment@2 { ++ target = <&gpio>; ++ __overlay__ { ++ uart0_pins: uart0_pins { ++ brcm,pins = <14 15>; ++ brcm,function = <4>; /* alt0 */ ++ brcm,pull = <0 2>; ++ }; ++ ++ uart1_pins: uart1_pins { ++ brcm,pins = <32 33>; ++ brcm,function = <2>; /* alt5=UART1 */ ++ brcm,pull = <0 0>; ++ }; ++ }; ++ }; ++ ++ fragment@3 { ++ target-path = "/aliases"; ++ __overlay__ { ++ serial0 = "/soc/uart@7e201000"; ++ serial1 = "/soc/uart@7e215040"; ++ }; ++ }; ++}; |