[PATCH v2 0/3] Audio and other peripherals on Orange Pi Zero

[PATCH v2 0/3] Audio and other peripherals on Orange Pi Zero

[J. Neuschäfer via B4 Relay]

Signed-off-by: J. Neuschäfer <j.ne@posteo.net>
---
Changes in v2:
- Rebase on (almost) 6.17-rc1
- Disable audio pins by default
- Provide separate DT overlay for the Orange Pi Zero Interface Board
- Link to v1: https://lore.kernel.org/r/20250418-opz-audio-v1-1-4e86bb5bc734@posteo.net

---
J. Neuschäfer (3):
      ARM: dts: allwinner: orangepi-zero: Add default audio routing
      ARM: dts: allwinner: orangepi-zero2: Add default audio routing
      ARM: dts: allwinner: Add Orange Pi Zero Interface Board overlay

 arch/arm/boot/dts/allwinner/Makefile               |  7 ++++
 .../dts/allwinner/sun8i-h2-plus-orangepi-zero.dts  | 14 +++++++
 .../dts/allwinner/sun8i-h3-orangepi-zero-plus2.dts | 14 +++++++
 .../sun8i-orangepi-zero-interface-board.dtso       | 46 ++++++++++++++++++++++
 4 files changed, 81 insertions(+)
---
base-commit: 36c31984cca32c5d9720c8c1eb5bd17fa915419f
change-id: 20250417-opz-audio-890849c8bb2e

Best regards,
-- 
J. Neuschäfer <j.ne@posteo.net>

[PATCH v2 1/3] ARM: dts: allwinner: orangepi-zero: Add default audio routing

[J. Neuschäfer via B4 Relay]

From: "J. Neuschäfer" <j.ne@posteo.net>

Line out playback and microphone capture work, after enabling the
corresponding ALSA controls. Tested with the Orange Pi Zero interface
board.

Signed-off-by: J. Neuschäfer <j.ne@posteo.net>
---

v2:
- Add an explanatory comment
---
 .../arm/boot/dts/allwinner/sun8i-h2-plus-orangepi-zero.dts | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/arch/arm/boot/dts/allwinner/sun8i-h2-plus-orangepi-zero.dts b/arch/arm/boot/dts/allwinner/sun8i-h2-plus-orangepi-zero.dts
index 1b001f2ad0efd2e77218742efe6d8edfdd18a816..b23cec5b89ebf61701e1d917929589eb6e884afd 100644
--- a/arch/arm/boot/dts/allwinner/sun8i-h2-plus-orangepi-zero.dts
+++ b/arch/arm/boot/dts/allwinner/sun8i-h2-plus-orangepi-zero.dts
@@ -112,6 +112,20 @@ wifi_pwrseq: pwrseq {
 	};
 };
 
+/*
+ * Audio input/output is exposed on the 13-pin header and can't be used for
+ * anything else. However, adapter boards may use different audio routing.
+ * - https://linux-sunxi.org/Xunlong_Orange_Pi_Zero#Expansion_Port
+ * - Allwinner H3 Datasheet, section 3.1. Pin Characteristics
+ */
+&codec {
+	allwinner,audio-routing =
+		"Line Out", "LINEOUT",
+		"MIC1", "Mic",
+		"Mic",  "MBIAS";
+	status = "disabled";
+};
+
 &cpu0 {
 	cpu-supply = <&reg_vdd_cpux>;
 };

-- 
2.48.0.rc1.219.gb6b6757d772

[PATCH v2 2/3] ARM: dts: allwinner: orangepi-zero2: Add default audio routing

[J. Neuschäfer via B4 Relay]

From: "J. Neuschäfer" <j.ne@posteo.net>

The Orange Pi Zero Plus 2 has the same pinout[1] as the Orange Pi
Zero[2] (with the possible exception of line-out left/right being
swapped), and the Orange Pi Zero Interface Board is sold[3] as
compatible with both of them. We can thus use the same audio routing.

[1]: http://www.orangepi.org/html/hardWare/computerAndMicrocontrollers/details/Orange-Pi-Zero-Plus-2.html
[2]: https://linux-sunxi.org/Xunlong_Orange_Pi_Zero#Expansion_Port
[3]: https://orangepi.com/index.php?route=product/product&product_id=871

Signed-off-by: J. Neuschäfer <j.ne@posteo.net>
---

v2:
- new patch
---
 .../boot/dts/allwinner/sun8i-h3-orangepi-zero-plus2.dts    | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/arch/arm/boot/dts/allwinner/sun8i-h3-orangepi-zero-plus2.dts b/arch/arm/boot/dts/allwinner/sun8i-h3-orangepi-zero-plus2.dts
index 7a6444a10e2534458b7380882ea4fd42bd54fea8..97a3565ac7a819be6b18d324fa6f65d0d1d2b2ad 100644
--- a/arch/arm/boot/dts/allwinner/sun8i-h3-orangepi-zero-plus2.dts
+++ b/arch/arm/boot/dts/allwinner/sun8i-h3-orangepi-zero-plus2.dts
@@ -99,6 +99,20 @@ wifi_pwrseq: pwrseq {
 	};
 };
 
+/*
+ * Audio input/output is exposed on the 13-pin header and can't be used for
+ * anything else. However, adapter boards may use different audio routing.
+ * - http://www.orangepi.org/html/hardWare/computerAndMicrocontrollers/details/Orange-Pi-Zero-Plus-2.html
+ * - Allwinner H3 Datasheet, section 3.1. Pin Characteristics
+ */
+&codec {
+	allwinner,audio-routing =
+		"Line Out", "LINEOUT",
+		"MIC1", "Mic",
+		"Mic",  "MBIAS";
+	status = "disabled";
+};
+
 &de {
 	status = "okay";
 };

-- 
2.48.0.rc1.219.gb6b6757d772

[PATCH v2 3/3] ARM: dts: allwinner: Add Orange Pi Zero Interface Board overlay

[J. Neuschäfer via B4 Relay]

From: "J. Neuschäfer" <j.ne@posteo.net>

The Orange Pi Zero interface board is a (mostly) passive adapter from the
13-pin header of the Orange Pi Zero and Orange Pi Zero Plus2 to standard
connectors (2x USB A, 1x Audio/Video output, 1x built-in microphone, 1x
infrared input). Headphones, microphone, infrared (CIR) input, and USB
have been tested with the Orange Pi Zero.

CVBS output is currently not supported.

  https://orangepi.com/index.php?route=product/product&product_id=871

Signed-off-by: J. Neuschäfer <j.ne@posteo.net>
---

v2:
- new patch
---
 arch/arm/boot/dts/allwinner/Makefile               |  7 ++++
 .../sun8i-orangepi-zero-interface-board.dtso       | 46 ++++++++++++++++++++++
 2 files changed, 53 insertions(+)

diff --git a/arch/arm/boot/dts/allwinner/Makefile b/arch/arm/boot/dts/allwinner/Makefile
index d799ad153b37b917d1e1c091fb051140398a574b..97d0a205493f40ba5969b5c8f4708a817ae725c5 100644
--- a/arch/arm/boot/dts/allwinner/Makefile
+++ b/arch/arm/boot/dts/allwinner/Makefile
@@ -182,6 +182,7 @@ dtb-$(CONFIG_MACH_SUN7I) += \
 	sun7i-a20-wits-pro-a20-dkt.dtb
 
 # Enables support for device-tree overlays for all pis
+DTC_FLAGS_sun8i-h2-plus-orangepi-zero := -@
 DTC_FLAGS_sun8i-h3-orangepi-lite := -@
 DTC_FLAGS_sun8i-h3-bananapi-m2-plus := -@
 DTC_FLAGS_sun8i-h3-nanopi-m1-plus := -@
@@ -225,6 +226,7 @@ dtb-$(CONFIG_MACH_SUN8I) += \
 	sun8i-h2-plus-libretech-all-h3-cc.dtb \
 	sun8i-h2-plus-orangepi-r1.dtb \
 	sun8i-h2-plus-orangepi-zero.dtb \
+	sun8i-h2-plus-orangepi-zero-interface-board.dtb \
 	sun8i-h3-bananapi-m2-plus.dtb \
 	sun8i-h3-bananapi-m2-plus-v1.2.dtb \
 	sun8i-h3-beelink-x2.dtb \
@@ -244,6 +246,7 @@ dtb-$(CONFIG_MACH_SUN8I) += \
 	sun8i-h3-orangepi-plus.dtb \
 	sun8i-h3-orangepi-plus2e.dtb \
 	sun8i-h3-orangepi-zero-plus2.dtb \
+	sun8i-h3-orangepi-zero-plus2-interface-board.dtb \
 	sun8i-h3-rervision-dvk.dtb \
 	sun8i-h3-zeropi.dtb \
 	sun8i-h3-emlid-neutis-n5h3-devboard.dtb \
@@ -264,6 +267,10 @@ dtb-$(CONFIG_MACH_SUN8I) += \
 	sun8i-v3s-licheepi-zero-dock.dtb \
 	sun8i-v3s-netcube-kumquat.dtb \
 	sun8i-v40-bananapi-m2-berry.dtb
+sun8i-h2-plus-orangepi-zero-interface-board-dtbs += \
+	sun8i-h2-plus-orangepi-zero.dtb sun8i-orangepi-zero-interface-board.dtbo
+sun8i-h3-orangepi-zero-plus2-interface-board-dtbs += \
+	sun8i-h3-orangepi-zero-plus2.dtb sun8i-orangepi-zero-interface-board.dtbo
 dtb-$(CONFIG_MACH_SUN9I) += \
 	sun9i-a80-optimus.dtb \
 	sun9i-a80-cubieboard4.dtb
diff --git a/arch/arm/boot/dts/allwinner/sun8i-orangepi-zero-interface-board.dtso b/arch/arm/boot/dts/allwinner/sun8i-orangepi-zero-interface-board.dtso
new file mode 100644
index 0000000000000000000000000000000000000000..e137eefee34163752372d442c22179b1fa41615a
--- /dev/null
+++ b/arch/arm/boot/dts/allwinner/sun8i-orangepi-zero-interface-board.dtso
@@ -0,0 +1,46 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR X11)
+/*
+ * Copyright (C) 2025 J. Neuschäfer <j.ne@posteo.net>
+ *
+ * Devicetree overlay for the Orange Pi Zero Interface board (OP0014).
+ *
+ *   https://orangepi.com/index.php?route=product/product&product_id=871
+ *
+ * This overlay applies to the following base files:
+ *
+ * - arch/arm/boot/dts/allwinner/sun8i-h2-plus-orangepi-zero.dts
+ * - arch/arm/boot/dts/allwinner/sun8i-h3-orangepi-zero-plus2.dts
+ */
+
+/dts-v1/;
+/plugin/;
+
+&codec {
+	status = "okay";
+};
+
+&de {
+	status = "okay";
+};
+
+&ehci2 {
+	status = "okay";
+};
+
+&ehci3 {
+	status = "okay";
+};
+
+&ir {
+	pinctrl-names = "default";
+	pinctrl-0 = <&r_ir_rx_pin>;
+	status = "okay";
+};
+
+&ohci2 {
+	status = "okay";
+};
+
+&ohci3 {
+	status = "okay";
+};

-- 
2.48.0.rc1.219.gb6b6757d772