3 files changed, 60 insertions, 0 deletions
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 0a13947381..cedddd370f 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -131,6 +131,7 @@ dtb-$(CONFIG_ROCKCHIP_RK3399) += \
 	rk3399-nanopc-t4.dtb \
 	rk3399-nanopi-m4.dtb \
 	rk3399-nanopi-m4-2gb.dtb \
+	rk3399-nanopi-m4b.dtb \
 	rk3399-nanopi-neo4.dtb \
 	rk3399-nanopi-r4s.dtb \
 	rk3399-orangepi.dtb \
diff --git a/arch/arm/dts/rk3399-nanopi-m4b-u-boot.dtsi b/arch/arm/dts/rk3399-nanopi-m4b-u-boot.dtsi
new file mode 100644
index 0000000000..9c3c1ef810
--- /dev/null
+++ b/arch/arm/dts/rk3399-nanopi-m4b-u-boot.dtsi
@@ -0,0 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2021 Alexandre Vicenzi <linux@alxd.me>
+ */
+
+#include "rk3399-nanopi4-u-boot.dtsi"
+#include "rk3399-sdram-ddr3-1866.dtsi"
diff --git a/arch/arm/dts/rk3399-nanopi-m4b.dts b/arch/arm/dts/rk3399-nanopi-m4b.dts
new file mode 100644
index 0000000000..72182c58cc
--- /dev/null
+++ b/arch/arm/dts/rk3399-nanopi-m4b.dts
@@ -0,0 +1,52 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * FriendlyElec NanoPi M4B board device tree source
+ *
+ * Copyright (c) 2020 Chen-Yu Tsai <wens@csie.org>
+ */
+
+/dts-v1/;
+#include "rk3399-nanopi-m4.dts"
+
+/ {
+	model = "FriendlyElec NanoPi M4B";
+	compatible = "friendlyarm,nanopi-m4b", "rockchip,rk3399";
+
+	adc-keys {
+		compatible = "adc-keys";
+		io-channels = <&saradc 1>;
+		io-channel-names = "buttons";
+		keyup-threshold-microvolt = <1500000>;
+		poll-interval = <100>;
+
+		recovery {
+			label = "Recovery";
+			linux,code = <KEY_VENDOR>;
+			press-threshold-microvolt = <18000>;
+		};
+	};
+};
+
+/* No USB type-C PD power manager */
+/delete-node/ &fusb0;
+
+&i2c4 {
+	status = "disabled";
+};
+
+&u2phy0_host {
+	phy-supply = <&vcc5v0_usb2>;
+};
+
+&u2phy0_otg {
+	phy-supply = <&vbus_typec>;
+};
+
+&u2phy1_otg {
+	phy-supply = <&vcc5v0_usb1>;
+};
+
+&vbus_typec {
+	enable-active-high;
+	gpios = <&gpio4 RK_PD2 GPIO_ACTIVE_HIGH>;
+};