[PATCH 4/4] arm64: dts: rockchip: rk3399: Add NanoPi M4B

[Chen-Yu Tsai]

From: Chen-Yu Tsai <wens at csie.org>

The NanoPi M4B is a minor revision of the original M4.

The differences against the original Nanopi M4 that are common with the
other M4V2 revision include:

  - microphone header removed
  - power button added
  - recovery button added

Additional changes specific to the M4B:

  - USB 3.0 hub removed; board now has 2x USB 3.0 type-A ports and 2x
    USB 2.0 ports
  - ADB toggle switch added; this changes the top USB 3.0 host port to
    a peripheral port
  - Type-C port no longer supports data or PD
  - WiFi/Bluetooth combo chip switched to AP6256, which supports BT 5.0
    but only 1T1R (down from 2T2R) for WiFi

Add a new dts file for the new board revision that shows the difference
against the original.

Signed-off-by: Chen-Yu Tsai <wens at csie.org>
---
 arch/arm64/boot/dts/rockchip/Makefile         |  1 +
 .../boot/dts/rockchip/rk3399-nanopi-m4b.dts   | 52 +++++++++++++++++++
 2 files changed, 53 insertions(+)
 create mode 100644 arch/arm64/boot/dts/rockchip/rk3399-nanopi-m4b.dts

diff --git a/arch/arm64/boot/dts/rockchip/Makefile b/arch/arm64/boot/dts/rockchip/Makefile
index 5a53979b7057..fd47414e40eb 100644
--- a/arch/arm64/boot/dts/rockchip/Makefile
+++ b/arch/arm64/boot/dts/rockchip/Makefile
@@ -32,6 +32,7 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-kobol-helios64.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-leez-p710.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-nanopc-t4.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-nanopi-m4.dtb
+dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-nanopi-m4b.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-nanopi-neo4.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-orangepi.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-pinebook-pro.dtb
diff --git a/arch/arm64/boot/dts/rockchip/rk3399-nanopi-m4b.dts b/arch/arm64/boot/dts/rockchip/rk3399-nanopi-m4b.dts
new file mode 100644
index 000000000000..72182c58cc46
--- /dev/null
+++ b/arch/arm64/boot/dts/rockchip/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 at 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>;
+};
-- 
2.29.1