[PATCH 1/3] arm64: dts: freescale: imx8-apalis: Add NAU8822 Bridge Tied Load

[Ernest Van Hoecke]

From: Ernest Van Hoecke <ernest.vanhoecke@xxxxxxxxxxx>

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 the Apalis iMX8.

The overlay is also combined with the Apalis iMX8QM V1.1 on 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.

The overlay supports both Apalis iMX8QP and iMX8QM modules.

Signed-off-by: Ernest Van Hoecke <ernest.vanhoecke@xxxxxxxxxxx>
---
 arch/arm64/boot/dts/freescale/Makefile                    |  6 ++++++
 .../dts/freescale/imx8-apalis-eval-v1.2-nau8822-btl.dtso  | 15 +++++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
index 9971b34f7301..2732b223eb3d 100644
--- a/arch/arm64/boot/dts/freescale/Makefile
+++ b/arch/arm64/boot/dts/freescale/Makefile
@@ -801,13 +801,19 @@ dtb-$(CONFIG_ARCH_MXC) += imx8mq-zii-ultra-zest.dtb
 imx8mq-tqma8mq-mba8mx-lvds-tm070jvhg33-dtbs += imx8mq-tqma8mq-mba8mx.dtb imx8mq-tqma8mq-mba8mx-lvds-tm070jvhg33.dtbo
 dtb-$(CONFIG_ARCH_MXC) += imx8mq-tqma8mq-mba8mx-lvds-tm070jvhg33.dtb
 
+dtb-$(CONFIG_ARCH_MXC) += imx8-apalis-eval-v1.2-nau8822-btl.dtbo
 dtb-$(CONFIG_ARCH_MXC) += imx8qm-apalis-eval.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8qm-apalis-eval-v1.2.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8qm-apalis-ixora-v1.1.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8qm-apalis-v1.1-eval.dtb
+dtb-$(CONFIG_ARCH_MXC) += imx8qm-apalis-v1.1-eval-v1.2-nau8822-btl.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8qm-apalis-v1.1-eval-v1.2.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8qm-apalis-v1.1-ixora-v1.1.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8qm-apalis-v1.1-ixora-v1.2.dtb
+
+imx8qm-apalis-v1.1-eval-v1.2-nau8822-btl-dtbs := imx8qm-apalis-v1.1-eval-v1.2.dtb \
+	imx8-apalis-eval-v1.2-nau8822-btl.dtbo
+
 dtb-$(CONFIG_ARCH_MXC) += imx8qm-mek.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8qm-tqma8qm-mba8x.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8qm-var-som-symphony.dtb
diff --git a/arch/arm64/boot/dts/freescale/imx8-apalis-eval-v1.2-nau8822-btl.dtso b/arch/arm64/boot/dts/freescale/imx8-apalis-eval-v1.2-nau8822-btl.dtso
new file mode 100644
index 000000000000..b2f9c43d29cd
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx8-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;
+};

-- 
2.43.0