[PATCH v1 08/15] arm64: dts: ti: k3-am62-verdin: Add NAU8822 Bridge Tied Load

[Vitor Soares]

From: Vitor Soares <vitor.soares at toradex.com>

Add a device tree overlay enabling Bridge Tied Load (BTL) mode on the
Nuvoton NAU8822 audio codec present on the Verdin Development Board.
In BTL mode, the two loudspeaker outputs are bridged to deliver higher
output power on the X28 speaker connector.

Assisted-by: Claude:claude-sonnet-4.6
Signed-off-by: Vitor Soares <vitor.soares at toradex.com>
---
 arch/arm64/boot/dts/ti/Makefile                    |  4 ++++
 .../dts/ti/k3-am625-verdin-dev-nau8822-btl.dtso    | 14 ++++++++++++++
 2 files changed, 18 insertions(+)
 create mode 100644 arch/arm64/boot/dts/ti/k3-am625-verdin-dev-nau8822-btl.dtso

diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
index 14898f8ab0e2..a1083c0b2502 100644
--- a/arch/arm64/boot/dts/ti/Makefile
+++ b/arch/arm64/boot/dts/ti/Makefile
@@ -29,6 +29,7 @@ dtb-$(CONFIG_ARCH_K3) += k3-am625-beagleplay-csi2-tevi-ov5640.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am625-phyboard-lyra-rdk.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am625-sk.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am625-tqma62xx-mba62xx.dtb
+dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-dev-nau8822-btl.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-dsi-to-hdmi.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-dsi-to-lvds-panel-cap-touch-10inch.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-nonwifi-dahlia-dsi-to-hdmi.dtb
@@ -224,6 +225,8 @@ k3-am625-sk-hdmi-audio-dtbs := k3-am625-sk.dtb k3-am62x-sk-hdmi-audio.dtbo
 k3-am625-verdin-wifi-dev-dsi-to-lvds-panel-cap-touch-10inch-dtbs := \
 	k3-am625-verdin-wifi-dev.dtb \
 	k3-am625-verdin-dsi-to-lvds-panel-cap-touch-10inch.dtbo
+k3-am625-verdin-wifi-dev-nau8822-btl-dtbs := k3-am625-verdin-wifi-dev.dtb \
+	k3-am625-verdin-dev-nau8822-btl.dtbo
 k3-am625-verdin-wifi-dev-panel-cap-touch-7inch-dsi-dtbs := \
 	k3-am625-verdin-wifi-dev.dtb \
 	k3-am625-verdin-panel-cap-touch-7inch-dsi.dtbo
@@ -332,6 +335,7 @@ dtb- += k3-am625-beagleplay-csi2-ov5640.dtb \
 	k3-am625-sk-csi2-tevi-ov5640.dtb \
 	k3-am625-sk-hdmi-audio.dtb \
 	k3-am625-verdin-wifi-dev-dsi-to-lvds-panel-cap-touch-10inch.dtb \
+	k3-am625-verdin-wifi-dev-nau8822-btl.dtb \
 	k3-am625-verdin-wifi-dev-panel-cap-touch-7inch-dsi.dtb \
 	k3-am625-verdin-wifi-mallow-panel-cap-touch-10inch-lvds.dtb \
 	k3-am62-lp-sk-hdmi-audio.dtb \
diff --git a/arch/arm64/boot/dts/ti/k3-am625-verdin-dev-nau8822-btl.dtso b/arch/arm64/boot/dts/ti/k3-am625-verdin-dev-nau8822-btl.dtso
new file mode 100644
index 000000000000..e4b662519a6b
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-am625-verdin-dev-nau8822-btl.dtso
@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/*
+ * Copyright (c) Toradex
+ *
+ * Enable Bridge Tied Load (BTL) speaker mode on the Verdin Development Board,
+ * combining the two loudspeaker outputs for higher output power.
+ */
+
+/dts-v1/;
+/plugin/;
+
+&nau8822_1a {
+	nuvoton,spk-btl;
+};
-- 
2.54.0