[PATCH v3 3/4] DO_NOT_MERGE arm64: dts: ti: Add AM62x MCAN MAIN domain transceiver overlay

From: Judith Mendez
Date: Mon May 01 2023 - 18:32:21 EST


Add an overlay for main domain MCAN on AM62x SK. The AM62x
SK board does not have on-board CAN transceiver so instead
of changing the DTB permanently, add an overlay to enable
MAIN domain MCAN and support for 1 CAN transceiver.

This DT overlay can be used with the following EVM:
Link: https://www.ti.com/tool/TCAN1042DEVM

Signed-off-by: Judith Mendez <jm@xxxxxx>
---
Changelog:
v3:
1. Add link for specific board

arch/arm64/boot/dts/ti/Makefile | 2 ++
.../boot/dts/ti/k3-am625-sk-mcan-main.dtso | 35 +++++++++++++++++++
2 files changed, 37 insertions(+)
create mode 100644 arch/arm64/boot/dts/ti/k3-am625-sk-mcan-main.dtso

diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
index c83c9d772b81..abe15e76b614 100644
--- a/arch/arm64/boot/dts/ti/Makefile
+++ b/arch/arm64/boot/dts/ti/Makefile
@@ -9,8 +9,10 @@
# alphabetically.

# Boards with AM62x SoC
+k3-am625-sk-mcan-dtbs := k3-am625-sk.dtb k3-am625-sk-mcan-main.dtbo
dtb-$(CONFIG_ARCH_K3) += k3-am625-beagleplay.dtb
dtb-$(CONFIG_ARCH_K3) += k3-am625-sk.dtb
+dtb-$(CONFIG_ARCH_K3) += k3-am625-sk-mcan.dtb
dtb-$(CONFIG_ARCH_K3) += k3-am62-lp-sk.dtb

# Boards with AM62Ax SoC
diff --git a/arch/arm64/boot/dts/ti/k3-am625-sk-mcan-main.dtso b/arch/arm64/boot/dts/ti/k3-am625-sk-mcan-main.dtso
new file mode 100644
index 000000000000..0a7b2f394f87
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-am625-sk-mcan-main.dtso
@@ -0,0 +1,35 @@
+// SPDX-License-Identifier: GPL-2.0
+/**
+ * DT overlay for MCAN transceiver in main domain on AM625 SK
+ *
+ * Copyright (C) 2022 Texas Instruments Incorporated - https://www.ti.com/
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include "k3-pinctrl.h"
+
+&{/} {
+ transceiver1: can-phy0 {
+ compatible = "ti,tcan1042";
+ #phy-cells = <0>;
+ max-bitrate = <5000000>;
+ };
+};
+
+&main_pmx0 {
+ main_mcan0_pins_default: main-mcan0-pins-default {
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x1dc, PIN_INPUT, 0) /* (E15) MCAN0_RX */
+ AM62X_IOPAD(0x1d8, PIN_OUTPUT, 0) /* (C15) MCAN0_TX */
+ >;
+ };
+};
+
+&main_mcan0 {
+ status = "okay";
+ pinctrl-names = "default";
+ pinctrl-0 = <&main_mcan0_pins_default>;
+ phys = <&transceiver1>;
+};
--
2.17.1