colibri-imx8x: add overlay to disable the cortex-m's uart

Related-to: ELB-4380
Signed-off-by: Henrique Garcia <henrique.garcia@toradex.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/overlays/colibri-imx8x_disable-cm40-uart_overlay.dts b/overlays/colibri-imx8x_disable-cm40-uart_overlay.dts
new file mode 100644
index 0000000..e778c87
--- /dev/null
+++ b/overlays/colibri-imx8x_disable-cm40-uart_overlay.dts
@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/*
+ * Copyright 2021 Toradex
+ */
+
+// Disables, at the Linux side, the UART that is shared with Cortex-M
+
+/dts-v1/;
+/plugin/;
+
+/{
+	compatible = "toradex,colibri-imx8";
+};
+
+&cm40_lpuart {
+	status = "disabled";
+};
+
+&cm40_uart_lpcg {
+	status = "disabled";
+};