[PATCH 1/4] arm64: dts: freescale: imx95-verdin: Add NAU8822 Bridge Tied Load

[Ernest Van Hoecke <ernestvanhoecke@gmail.com>]

From: Ernest Van Hoecke <ernest.vanhoecke@toradex.com>

The NAU8822 on the Verdin Development Board can combine its two
loudspeaker outputs into a Bridge Tied Load output. Add an overlay to
select this mode when using the board with Verdin iMX95.

The overlay is also combined with the Verdin iMX95 Development Board
device tree to provide a ready-to-use DTB for the WiFi SoM variant.
The codec and its routing are already described by the carrier device
tree.

Signed-off-by: Ernest Van Hoecke <ernest.vanhoecke@toradex.com>
---
 arch/arm64/boot/dts/freescale/Makefile                     |  4 ++++
 .../boot/dts/freescale/imx95-verdin-dev-nau8822-btl.dtso   | 14 ++++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
index 7944e3b32513..a7ae74a706a8 100644
--- a/arch/arm64/boot/dts/freescale/Makefile
+++ b/arch/arm64/boot/dts/freescale/Makefile
@@ -959,6 +959,7 @@ dtb-$(CONFIG_ARCH_MXC) += imx95-toradex-smarc-dev.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx95-tqma9596la-mba95xxca.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx95-tqma9596sa-mb-smarc-2.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx95-var-dart-sonata.dtb
+dtb-$(CONFIG_ARCH_MXC) += imx95-verdin-dev-nau8822-btl.dtbo
 dtb-$(CONFIG_ARCH_MXC) += imx95-verdin-nonwifi-dahlia.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx95-verdin-nonwifi-dev.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx95-verdin-nonwifi-ivy.dtb
@@ -966,12 +967,15 @@ dtb-$(CONFIG_ARCH_MXC) += imx95-verdin-nonwifi-mallow.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx95-verdin-nonwifi-yavia.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx95-verdin-nonwifi-zinnia.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx95-verdin-wifi-dahlia.dtb
+dtb-$(CONFIG_ARCH_MXC) += imx95-verdin-wifi-dev-nau8822-btl.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx95-verdin-wifi-dev.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx95-verdin-wifi-ivy.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx95-verdin-wifi-mallow.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx95-verdin-wifi-yavia.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx95-verdin-wifi-zinnia.dtb
 
+imx95-verdin-wifi-dev-nau8822-btl-dtbs := imx95-verdin-wifi-dev.dtb imx95-verdin-dev-nau8822-btl.dtbo
+
 imx95-15x15-evk-pcie-dtbs += imx95-15x15-evk.dtb imx-m2-pcie.dtbo
 dtb-$(CONFIG_ARCH_MXC) += imx95-15x15-evk-pcie.dtb
 
diff --git a/arch/arm64/boot/dts/freescale/imx95-verdin-dev-nau8822-btl.dtso b/arch/arm64/boot/dts/freescale/imx95-verdin-dev-nau8822-btl.dtso
new file mode 100644
index 000000000000..e94c60381c4e
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx95-verdin-dev-nau8822-btl.dtso
@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: GPL-2.0-only 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;
+};

-- 
2.43.0