From 2f474da98caf9a75d7777c5465d281240c706bc6 Mon Sep 17 00:00:00 2001
From: Aswath Govindraju <a-govindraju@ti.com>
Date: Mon, 22 Nov 2021 19:11:58 +0530
Subject: [PATCH] arm64: dts: ti: k3-am642-evm/sk: Add support for main domain
 mcan nodes in EVM and disable them on SK

AM642 EVM has two CAN connecters brought out from the two MCAN instances in
the main domain through transceivers. Add device tree nodes for
transceivers and set the required properties in the mcan device tree nodes,
in EVM device tree file.

On AM642 SK there are no connectors brought out for CAN. Therefore, disable
the mcan device tree nodes in the SK device tree file.

Signed-off-by: Aswath Govindraju <a-govindraju@ti.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Reviewed-by: Apurva Nandan <a-nandan@ti.com>
Link: https://lore.kernel.org/r/20211122134159.29936-7-a-govindraju@ti.com
---
 arch/arm64/boot/dts/ti/k3-am642-evm.dts | 40 +++++++++++++++++++++++++
 arch/arm64/boot/dts/ti/k3-am642-sk.dts  |  8 +++++
 2 files changed, 48 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am642-evm.dts b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
index 6726c4c7c28c9..e94ae178b1ae3 100644
--- a/arch/arm64/boot/dts/ti/k3-am642-evm.dts
+++ b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
@@ -184,6 +184,20 @@
 			};
 		};
 	};
+
+	transceiver1: can-phy0 {
+		compatible = "ti,tcan1042";
+		#phy-cells = <0>;
+		max-bitrate = <5000000>;
+		standby-gpios = <&exp1 8 GPIO_ACTIVE_HIGH>;
+	};
+
+	transceiver2: can-phy1 {
+		compatible = "ti,tcan1042";
+		#phy-cells = <0>;
+		max-bitrate = <5000000>;
+		standby-gpios = <&exp1 9 GPIO_ACTIVE_HIGH>;
+	};
 };
 
 &main_pmx0 {
@@ -294,6 +308,20 @@
 			AM64X_IOPAD(0x0270, PIN_INPUT, 0) /* (D18) ECAP0_IN_APWM_OUT */
 		>;
 	};
+
+	main_mcan0_pins_default: main-mcan0-pins-default {
+		pinctrl-single,pins = <
+			AM64X_IOPAD(0x0254, PIN_INPUT, 0) /* (B17) MCAN0_RX */
+			AM64X_IOPAD(0x0250, PIN_OUTPUT, 0) /* (A17) MCAN0_TX */
+		>;
+	};
+
+	main_mcan1_pins_default: main-mcan1-pins-default {
+		pinctrl-single,pins = <
+			AM64X_IOPAD(0x025c, PIN_INPUT, 0) /* (D17) MCAN1_RX */
+			AM64X_IOPAD(0x0258, PIN_OUTPUT, 0) /* (C17) MCAN1_TX */
+		>;
+	};
 };
 
 &main_uart0 {
@@ -638,3 +666,15 @@
 &icssg1_mdio {
 	status = "disabled";
 };
+
+&main_mcan0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&main_mcan0_pins_default>;
+	phys = <&transceiver1>;
+};
+
+&main_mcan1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&main_mcan1_pins_default>;
+	phys = <&transceiver2>;
+};
diff --git a/arch/arm64/boot/dts/ti/k3-am642-sk.dts b/arch/arm64/boot/dts/ti/k3-am642-sk.dts
index 6b04745147be4..a9785bec12dfa 100644
--- a/arch/arm64/boot/dts/ti/k3-am642-sk.dts
+++ b/arch/arm64/boot/dts/ti/k3-am642-sk.dts
@@ -525,3 +525,11 @@
 &icssg1_mdio {
 	status = "disabled";
 };
+
+&main_mcan0 {
+	status = "disabled";
+};
+
+&main_mcan1 {
+	status = "disabled";
+};