[PATCH 6/7] ARM: dts: imx6q-apalis: Add NAU8822 Bridge Tied Load

[Leonardo Costa <leoreis.costa@gmail.com>]

From: Leonardo Costa <leonardo.costa@toradex.com>

The NAU8822 on the Apalis Evaluation Board V1.2 can combine its two
loudspeaker outputs into a Bridge Tied Load output. Add an overlay to
select this mode when using the board with Apalis iMX6.

The overlay is also combined with the Apalis iMX6 V1.2 Evaluation Board
V1.2 device tree to provide a ready-to-use DTB. The codec and its routing
are already described by the carrier device tree.

Signed-off-by: Leonardo Costa <leonardo.costa@toradex.com>
---
 arch/arm/boot/dts/nxp/imx/Makefile                |  6 ++++++
 .../imx/imx6q-apalis-eval-v1.2-nau8822-btl.dtso   | 15 +++++++++++++++
 2 files changed, 21 insertions(+)
 create mode 100644 arch/arm/boot/dts/nxp/imx/imx6q-apalis-eval-v1.2-nau8822-btl.dtso

diff --git a/arch/arm/boot/dts/nxp/imx/Makefile b/arch/arm/boot/dts/nxp/imx/Makefile
index cd1b095ce06f4..cb2ad0756e7fe 100644
--- a/arch/arm/boot/dts/nxp/imx/Makefile
+++ b/arch/arm/boot/dts/nxp/imx/Makefile
@@ -87,6 +87,10 @@ imx6q-apalis-v1.2-eval-v1.2-hdmi-dtbs := \
 	imx6q-apalis-v1.2-eval-v1.2.dtb \
 	imx6q-apalis-hdmi.dtbo
 
+imx6q-apalis-v1.2-eval-v1.2-nau8822-btl-dtbs := \
+	imx6q-apalis-v1.2-eval-v1.2.dtb \
+	imx6q-apalis-eval-v1.2-nau8822-btl.dtbo
+
 imx6q-apalis-v1.2-ixora-hdmi-dtbs := \
 	imx6q-apalis-v1.2-ixora.dtb \
 	imx6q-apalis-hdmi.dtbo
@@ -238,6 +242,7 @@ dtb-$(CONFIG_SOC_IMX6Q) += \
 	imx6q-apalis-eval-hdmi.dtb \
 	imx6q-apalis-eval-v1.2.dtb \
 	imx6q-apalis-eval-v1.2-hdmi.dtb \
+	imx6q-apalis-eval-v1.2-nau8822-btl.dtbo \
 	imx6q-apalis-hdmi.dtbo \
 	imx6q-apalis-ixora.dtb \
 	imx6q-apalis-ixora-hdmi.dtb \
@@ -252,6 +257,7 @@ dtb-$(CONFIG_SOC_IMX6Q) += \
 	imx6q-apalis-v1.2-eval-hdmi.dtb \
 	imx6q-apalis-v1.2-eval-v1.2.dtb \
 	imx6q-apalis-v1.2-eval-v1.2-hdmi.dtb \
+	imx6q-apalis-v1.2-eval-v1.2-nau8822-btl.dtb \
 	imx6q-apalis-v1.2-ixora.dtb \
 	imx6q-apalis-v1.2-ixora-hdmi.dtb \
 	imx6q-apalis-v1.2-ixora-v1.1.dtb \
diff --git a/arch/arm/boot/dts/nxp/imx/imx6q-apalis-eval-v1.2-nau8822-btl.dtso b/arch/arm/boot/dts/nxp/imx/imx6q-apalis-eval-v1.2-nau8822-btl.dtso
new file mode 100644
index 0000000000000..b2f9c43d29cd2
--- /dev/null
+++ b/arch/arm/boot/dts/nxp/imx/imx6q-apalis-eval-v1.2-nau8822-btl.dtso
@@ -0,0 +1,15 @@
+// SPDX-License-Identifier: GPL-2.0-only OR MIT
+/*
+ * Copyright (c) Toradex
+ *
+ * Enable Bridge Tied Load (BTL) speaker mode on the Apalis Evaluation
+ * Board V1.2, combining the two loudspeaker outputs for higher output
+ * power.
+ */
+
+/dts-v1/;
+/plugin/;
+
+&nau8822_1a {
+	nuvoton,spk-btl;
+};