arm64: dts: ti: k3-am62-verdin: Add NAU8822 Bridge Tied Load

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@toradex.com>
Reviewed-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Link: https://patch.msgid.link/20260522161105.277519-20-ivitro@gmail.com
Signed-off-by: Nishanth Menon <nm@ti.com>

diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
index 14898f8ab0e2a1dcd78e7de1fdf7620e7ed6f330..a1083c0b2502180773c74dc86e3416a6ae702e4d 100644 (file)
--- 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 (file)
index 0000000..e4b6625
--- /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;
+};