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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.patch117
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 0000000000..e8c57c785a
--- /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";
++ };
++ };
++};