linux-kernel - [PATCH 6/6] arm64: dts: ti: k3-am642-evm/sk: Add support for main domain mcan nodes in EVM and disable them on SK

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Date:   Tue, 20 Jul 2021 19:46:42 +0530
From:   Aswath Govindraju <a-govindraju@...com>
To:     unlisted-recipients:; (no To-header on input)
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Nishanth Menon <nm@...com>, Tero Kristo <kristo@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Marc Kleine-Budde <mkl@...gutronix.de>,
        Lokesh Vutla <lokeshvutla@...com>,
        Aswath Govindraju <a-govindraju@...com>
Subject: [PATCH 6/6] 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@...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 030712221188..1c26ca41e6a5 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 {
@@ -288,6 +302,20 @@
 			AM64X_IOPAD(0x0008, PIN_INPUT, 0) /* (N19) OSPI0_DQS */
 		>;
 	};
+
+	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 {
@@ -574,3 +602,15 @@
 	num-lanes = <1>;
 	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 d3aa2901e6fd..15cde862f62c 100644
--- a/arch/arm64/boot/dts/ti/k3-am642-sk.dts
+++ b/arch/arm64/boot/dts/ti/k3-am642-sk.dts
@@ -453,3 +453,11 @@
 &pcie0_ep {
 	status = "disabled";
 };
+
+&main_mcan0 {
+	status = "disabled";
+};
+
+&main_mcan1 {
+	status = "disabled";
+};
-- 
2.17.1