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From: Bhavya Kapoor <b-kapoor@ti.com>
To: <linux-kernel@vger.kernel.org>, <devicetree@vger.kernel.org>
CC: <b-kapoor@ti.com>, <linux-arm-kernel@lists.infradead.org>,
        <conor+dt@kernel.org>, <krzk+dt@kernel.org>, <robh@kernel.org>,
        <kristo@kernel.org>, <vigneshr@ti.com>, <nm@ti.com>
Subject: [PATCH] arm64: dts: ti: k3-j784s4-evm: Add support for multiple CAN instances
Date: Fri, 12 Apr 2024 01:47:47 +0530
Message-ID: <20240411201747.18697-1-b-kapoor@ti.com>
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CAN instances 0 and 1 in the mcu domain and 16 in the main domain are
brought on the evm through headers J42, J43 and J46 respectively. Thus,
add their respective transceiver's 0, 1 and 2 dt nodes to add support
for these CAN instances.

CAN instance 4 in the main domain is brought on the evm through header
J45. The CAN High and Low lines from the SoC are routed through a mux
on the evm. The select lines need to be set for the CAN signals to
reach to its transceiver on the evm. Therefore, add transceiver 3
dt node to add support for this CAN instance.

Signed-off-by: Bhavya Kapoor <b-kapoor@ti.com>
---

rebased to next-20240411

 arch/arm64/boot/dts/ti/k3-j784s4-evm.dts | 107 +++++++++++++++++++++++
 1 file changed, 107 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts b/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts
index 81fd7afac8c5..e56901973895 100644
--- a/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts
+++ b/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts
@@ -272,6 +272,45 @@ dp0_connector_in: endpoint {
 			};
 		};
 	};
+
+	transceiver0: can-phy0 {
+		compatible = "ti,tcan1042";
+		#phy-cells = <0>;
+		max-bitrate = <5000000>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&mcu_mcan0_gpio_pins_default>;
+		standby-gpios = <&wkup_gpio0 69 GPIO_ACTIVE_HIGH>;
+	};
+
+	transceiver1: can-phy1 {
+		compatible = "ti,tcan1042";
+		#phy-cells = <0>;
+		max-bitrate = <5000000>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&mcu_mcan1_gpio_pins_default>;
+		standby-gpios = <&wkup_gpio0 2 GPIO_ACTIVE_HIGH>;
+	};
+
+	transceiver2: can-phy2 {
+		/* standby pin has been grounded by default */
+		compatible = "ti,tcan1042";
+		#phy-cells = <0>;
+		max-bitrate = <5000000>;
+	};
+
+	transceiver3: can-phy3 {
+		compatible = "ti,tcan1042";
+		#phy-cells = <0>;
+		max-bitrate = <5000000>;
+		standby-gpios = <&exp2 7 GPIO_ACTIVE_HIGH>;
+		mux-states = <&mux1 1>;
+	};
+
+	mux1: mux-controller {
+		compatible = "gpio-mux";
+		#mux-state-cells = <1>;
+		mux-gpios = <&exp2 14 GPIO_ACTIVE_HIGH>;
+	};
 };
 
 &wkup_gpio0 {
@@ -336,6 +375,20 @@ J784S4_IOPAD(0x014, PIN_INPUT_PULLUP, 8) /* (AG33) MCAN14_TX.I2C4_SCL */
 			J784S4_IOPAD(0x010, PIN_INPUT_PULLUP, 8) /* (AH33) MCAN13_RX.I2C4_SDA */
 		>;
 	};
+
+	main_mcan4_pins_default: main-mcan4-default-pins {
+		pinctrl-single,pins = <
+			J784S4_IOPAD(0x088, PIN_INPUT, 0) /* (AF36) MCAN4_RX */
+			J784S4_IOPAD(0x084, PIN_OUTPUT, 0) /* (AG38) MCAN4_TX */
+		>;
+	};
+
+	main_mcan16_pins_default: main-mcan16-default-pins {
+		pinctrl-single,pins = <
+			J784S4_IOPAD(0x028, PIN_INPUT, 0) /* (AE33) MCAN16_RX */
+			J784S4_IOPAD(0x024, PIN_OUTPUT, 0) /* (AH34) MCAN16_TX */
+		>;
+	};
 };
 
 &wkup_pmx2 {
@@ -415,6 +468,32 @@ J784S4_WKUP_IOPAD(0x104, PIN_INPUT, 0) /* (U33) MCU_ADC1_AIN6 */
 			J784S4_WKUP_IOPAD(0x108, PIN_INPUT, 0) /* (Y36) MCU_ADC1_AIN7 */
 		>;
 	};
+
+	mcu_mcan0_pins_default: mcu-mcan0-default-pins {
+		pinctrl-single,pins = <
+			J784S4_WKUP_IOPAD(0x050, PIN_OUTPUT, 0) /* (K33) MCU_MCAN0_TX */
+			J784S4_WKUP_IOPAD(0x054, PIN_INPUT, 0) /* (F38) MCU_MCAN0_RX */
+		>;
+	};
+
+	mcu_mcan1_pins_default: mcu-mcan1-default-pins {
+		pinctrl-single,pins = <
+			J784S4_WKUP_IOPAD(0x068, PIN_OUTPUT, 0) /* (H35) WKUP_GPIO0_4.MCU_MCAN1_TX */
+			J784S4_WKUP_IOPAD(0x06c, PIN_INPUT, 0) /* (K36) WKUP_GPIO0_5.MCU_MCAN1_RX */
+		>;
+	};
+
+	mcu_mcan0_gpio_pins_default: mcu-mcan0-gpio-default-pins {
+		pinctrl-single,pins = <
+			J784S4_WKUP_IOPAD(0x040, PIN_INPUT, 7) /* (J38) MCU_SPI0_D1.WKUP_GPIO0_69 */
+		>;
+	};
+
+	mcu_mcan1_gpio_pins_default: mcu-mcan1-gpio-default-pins {
+		pinctrl-single,pins = <
+			J784S4_WKUP_IOPAD(0x060, PIN_INPUT, 7) /* (J35) WKUP_GPIO0_2 */
+		>;
+	};
 };
 
 &wkup_pmx1 {
@@ -1105,3 +1184,31 @@ dp0_out: endpoint {
 		};
 	};
 };
+
+&mcu_mcan0 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&mcu_mcan0_pins_default>;
+	phys = <&transceiver0>;
+};
+
+&mcu_mcan1 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&mcu_mcan1_pins_default>;
+	phys = <&transceiver1>;
+};
+
+&main_mcan16 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&main_mcan16_pins_default>;
+	phys = <&transceiver2>;
+};
+
+&main_mcan4 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&main_mcan4_pins_default>;
+	phys = <&transceiver3>;
+};
-- 
2.40.1