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From cea75af3d1cc86ea8dec19cfe3c817b7c7869037 Mon Sep 17 00:00:00 2001
From: lbonn <bonnans.l@gmail.com>
Date: Fri, 13 Sep 2019 12:46:31 +0200
Subject: [PATCH] Add rpi4 uart0 dtb overlay
---
arch/arm/boot/dts/overlays/Makefile | 2 ++
.../boot/dts/overlays/uart0-rpi4-overlay.dts | 26 +++++++++++++++++++
2 files changed, 28 insertions(+)
create mode 100644 arch/arm/boot/dts/overlays/uart0-rpi4-overlay.dts
diff --git a/arch/arm/boot/dts/overlays/Makefile b/arch/arm/boot/dts/overlays/Makefile
index 6b4af500f51c..634a2f252b17 100644
--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -185,6 +185,8 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
w1-gpio-pullup.dtbo \
wittypi.dtbo
+dtbo-$(CONFIG_ARCH_BCM2835) += uart0-rpi4.dtbo
+
targets += dtbs dtbs_install
targets += $(dtbo-y)
diff --git a/arch/arm/boot/dts/overlays/uart0-rpi4-overlay.dts b/arch/arm/boot/dts/overlays/uart0-rpi4-overlay.dts
new file mode 100644
index 000000000000..048ec5755f6a
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/uart0-rpi4-overlay.dts
@@ -0,0 +1,26 @@
+/dts-v1/;
+/plugin/;
+
+/{
+ compatible = "brcm,bcm2835";
+
+ fragment@0 {
+ target = <&uart0>;
+ __overlay__ {
+ pinctrl-names = "default";
+ pinctrl-0 = <&uart0_pins>;
+ status = "okay";
+ };
+ };
+
+ fragment@1 {
+ target = <&gpio>;
+ __overlay__ {
+ uart0_pins: uart0_pins {
+ brcm,pins = <30 31 32 33>;
+ brcm,function = <7>;
+ brcm,pull = <2 0 0 2>;
+ };
+ };
+ };
+};
--
2.20.1
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