[RFC] arm64: dts: allwinner: a64: Add overlay for Realtek

[Peter Robinson <pbrobinson@gmail.com>]

Add overlay for the Pine64 Realtek rtl8723bs WiFi
module that works on the Pine64/64+/SoPine devices.

Signed-off-by: Peter Robinson <pbrobinson@gmail.com>

I've looked at overlays for other vendors, such as available
for some of the Rockchip devices, and I believe I have this
mostly correct but would like some feedback both on if I have
everything needed for Allwinner devices, but also what's needed
to be able to use a single overlay across more than one device.

This is dependent on the following [1] patch series.

Peter

[1] https://lore.kernel.org/linux-devicetree/20250419160051.677485-3-pbrobinson@gmail.com/t/#u

---
 arch/arm64/boot/dts/allwinner/Makefile        |  6 ++++
 .../allwinner/sun50i-a64-pine64-realtek.dtso  | 30 +++++++++++++++++++
 2 files changed, 36 insertions(+)
 create mode 100644 arch/arm64/boot/dts/allwinner/sun50i-a64-pine64-realtek.dtso

diff --git a/arch/arm64/boot/dts/allwinner/Makefile b/arch/arm64/boot/dts/allwinner/Makefile
index 00bed412ee31..be991f8d8110 100644
--- a/arch/arm64/boot/dts/allwinner/Makefile
+++ b/arch/arm64/boot/dts/allwinner/Makefile
@@ -8,6 +8,7 @@ dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-olinuxino-emmc.dtb
 dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-orangepi-win.dtb
 dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-pine64-lts.dtb
 dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-pine64-plus.dtb sun50i-a64-pine64.dtb
+dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-pine64-realtek.dtb
 dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-pinebook.dtb
 dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-pinephone-1.0.dtb
 dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-pinephone-1.1.dtb
@@ -52,3 +53,8 @@ dtb-$(CONFIG_ARCH_SUNXI) += sun50i-h700-anbernic-rg35xx-2024.dtb
 dtb-$(CONFIG_ARCH_SUNXI) += sun50i-h700-anbernic-rg35xx-h.dtb
 dtb-$(CONFIG_ARCH_SUNXI) += sun50i-h700-anbernic-rg35xx-plus.dtb
 dtb-$(CONFIG_ARCH_SUNXI) += sun50i-h700-anbernic-rg35xx-sp.dtb
+
+# Overlays
+sun50i-a64-pine64-realtek-dtbs      := sun50i-a64-pine64.dtb sun50i-a64-pine64-realtek.dtbo
+sun50i-a64-pine64-lts-realtek-dtbs  := sun50i-a64-pine64-lts.dtb sun50i-a64-pine64-realtek.dtbo
+sun50i-a64-pine64-plus-realtek-dtbs := sun50i-a64-pine64-plus.dtb sun50i-a64-pine64-realtek.dtbo
diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-pine64-realtek.dtso b/arch/arm64/boot/dts/allwinner/sun50i-a64-pine64-realtek.dtso
new file mode 100644
index 000000000000..51b57a46e23f
--- /dev/null
+++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-pine64-realtek.dtso
@@ -0,0 +1,30 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+// Copyright (c) 2025 Peter Robinson
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+
+&mmc1 {
+	status = "okay";
+
+	rtl8723bs: wifi@1 {
+		reg = <1>;
+		interrupt-parent = <&r_pio>;
+		interrupts = <0 3 IRQ_TYPE_LEVEL_LOW>; /* PL3 */
+		interrupt-names = "host-wake";
+	};
+};
+
+&uart1 {
+	status = "okay";
+
+	bluetooth {
+		compatible = "realtek,rtl8723bs-bt";
+		device-wake-gpios = <&r_pio 0 6 GPIO_ACTIVE_HIGH>; /* PL6 */
+		enable-gpios = <&r_pio 0 4 GPIO_ACTIVE_HIGH>; /* PL4 */
+		host-wake-gpios = <&r_pio 0 5 GPIO_ACTIVE_HIGH>; /* PL5 */
+	};
+};
-- 
2.49.0