From: Álvaro Fernández Rojas <noltari@gmail.com>
Date: Tue, 3 Sep 2019 11:01:50 +0000 (+0200)
Subject: brcm2708: restore UART on RPi 0W, 3B, 3B+ and 4B
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=5287ac2dfbd0393e23e35e415ddf37f42df9b58e;p=openwrt%2Fstaging%2Fdedeckeh.git

brcm2708: restore UART on RPi 0W, 3B, 3B+ and 4B

Disable Bluetooth and restore UART to GPIOs 14 & 15.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
---

diff --git a/target/linux/brcm2708/image/Makefile b/target/linux/brcm2708/image/Makefile
index f1a4bb8dc4..97f127d307 100644
--- a/target/linux/brcm2708/image/Makefile
+++ b/target/linux/brcm2708/image/Makefile
@@ -28,6 +28,7 @@ define Build/boot-common
 	mcopy -i $@.boot $(KDIR)/LICENCE.broadcom ::
 	mcopy -i $@.boot cmdline.txt ::
 	mcopy -i $@.boot $(BOOT_CONFIG) ::config.txt
+	mcopy -i $@.boot distroconfig.txt ::
 	mcopy -i $@.boot $(IMAGE_KERNEL) ::$(KERNEL_IMG)
 	$(foreach dts,$(shell echo $(DEVICE_DTS)),mcopy -i $@.boot $(DTS_DIR)/$(dts).dtb ::;)
 	mmd -i $@.boot ::/overlays
diff --git a/target/linux/brcm2708/image/config-bcm2711-arm64.txt b/target/linux/brcm2708/image/config-bcm2711-arm64.txt
index 1af8ed0dfe..984aab585e 100644
--- a/target/linux/brcm2708/image/config-bcm2711-arm64.txt
+++ b/target/linux/brcm2708/image/config-bcm2711-arm64.txt
@@ -9,3 +9,9 @@
 
 # Force aarch64
 arm_64bit=1
+
+# OpenWrt config
+include distroconfig.txt
+
+[all]
+# Place your custom settings here.
diff --git a/target/linux/brcm2708/image/config.txt b/target/linux/brcm2708/image/config.txt
index 0b963a99ae..f8ca1bf2d4 100644
--- a/target/linux/brcm2708/image/config.txt
+++ b/target/linux/brcm2708/image/config.txt
@@ -6,3 +6,9 @@
 # For overclocking and various other settings, see:
 # https://www.raspberrypi.org/documentation/configuration/config-txt/README.md
 ################################################################################
+
+# OpenWrt config
+include distroconfig.txt
+
+[all]
+# Place your custom settings here.
diff --git a/target/linux/brcm2708/image/distroconfig.txt b/target/linux/brcm2708/image/distroconfig.txt
new file mode 100644
index 0000000000..54cf44346f
--- /dev/null
+++ b/target/linux/brcm2708/image/distroconfig.txt
@@ -0,0 +1,14 @@
+################################################################################
+# Bootloader configuration - distroconfig.txt
+################################################################################
+
+# Restore PL011 (ttyAMA0) to GPIOs 14 & 15, instead of Mini UART (ttyS0).
+# Mini UART is disabled by default unless "enable_uart=1" is specified,
+#  which changes the core frequency to a fixed value and impacts performance.
+# See https://www.raspberrypi.org/documentation/configuration/uart.md
+[pi0w]
+dtoverlay=disable-bt
+[pi3]
+dtoverlay=disable-bt
+[pi4]
+dtoverlay=disable-bt