linux-kernel - [PATCH 2/8] arm64: dts: ti: k3-j784s4-evm: Add mcu and wakeup uarts

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Date:   Fri, 2 Jun 2023 16:49:31 -0500
From:   Nishanth Menon <nm@...com>
To:     Conor Dooley <conor+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Tero Kristo <kristo@...nel.org>,
        Vignesh Raghavendra <vigneshr@...com>
CC:     <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, Nishanth Menon <nm@...com>,
        Udit Kumar <u-kumar1@...com>, Nitin Yadav <n-yadav@...com>,
        Neha Malcom Francis <n-francis@...com>,
        Sinthu Raja <sinthu.raja@...com>,
        Thejasvi Konduru <t-konduru@...com>,
        Dasnavis Sabiya <sabiya.d@...com>
Subject: [PATCH 2/8] arm64: dts: ti: k3-j784s4-evm: Add mcu and wakeup uarts

Add wakeup and MCU uart. This allows the device tree usage in
bootloader and firmwares that can configure the same appropriately.

Signed-off-by: Nishanth Menon <nm@...com>
---
Depends on https://lore.kernel.org/linux-arm-kernel/20230503083143.32369-1-t-konduru@ti.com/

 arch/arm64/boot/dts/ti/k3-j784s4-evm.dts | 33 ++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts b/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts
index 34e9bc89ac66..3f499e527523 100644
--- a/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts
+++ b/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts
@@ -20,6 +20,8 @@ chosen {
 	};
 
 	aliases {
+		serial0 = &wkup_uart0;
+		serial1 = &mcu_uart0;
 		serial2 = &main_uart8;
 		mmc0 = &main_sdhci0;
 		mmc1 = &main_sdhci1;
@@ -142,6 +144,24 @@ J784S4_IOPAD(0x020, PIN_INPUT, 7) /* (AJ35) MCAN15_RX.GPIO0_8 */
 };
 
 &wkup_pmx2 {
+	wkup_uart0_pins_default: wkup-uart0-pins-default {
+		pinctrl-single,pins = <
+			J721S2_WKUP_IOPAD(0x070, PIN_INPUT, 0) /* (L37) WKUP_GPIO0_6.WKUP_UART0_CTSn */
+			J721S2_WKUP_IOPAD(0x074, PIN_INPUT, 0) /* (L36) WKUP_GPIO0_7.WKUP_UART0_RTSn */
+			J721S2_WKUP_IOPAD(0x048, PIN_INPUT, 0) /* (K35) WKUP_UART0_RXD */
+			J721S2_WKUP_IOPAD(0x04c, PIN_INPUT, 0) /* (K34) WKUP_UART0_TXD */
+		>;
+	};
+
+	mcu_uart0_pins_default: mcu-uart0-pins-default {
+		pinctrl-single,pins = <
+			J784S4_WKUP_IOPAD(0x090, PIN_INPUT, 0) /* (H37) WKUP_GPIO0_14.MCU_UART0_CTSn */
+			J784S4_WKUP_IOPAD(0x094, PIN_OUTPUT, 0) /* (K37) WKUP_GPIO0_15.MCU_UART0_RTSn */
+			J784S4_WKUP_IOPAD(0x08c, PIN_INPUT, 0) /* (K38) WKUP_GPIO0_13.MCU_UART0_RXD */
+			J784S4_WKUP_IOPAD(0x088, PIN_OUTPUT, 0) /* (J37) WKUP_GPIO0_12.MCU_UART0_TXD */
+		>;
+	};
+
 	mcu_cpsw_pins_default: mcu-cpsw-pins-default {
 		pinctrl-single,pins = <
 			J784S4_WKUP_IOPAD(0x02c, PIN_INPUT, 0) /* (A35) MCU_RGMII1_RD0 */
@@ -167,6 +187,19 @@ J784S4_WKUP_IOPAD(0x030, PIN_INPUT, 0) /* (B35) MCU_MDIO0_MDIO */
 	};
 };
 
+&wkup_uart0 {
+	/* Firmware usage */
+	status = "reserved";
+	pinctrl-names = "default";
+	pinctrl-0 = <&wkup_uart0_pins_default>;
+};
+
+&mcu_uart0 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&mcu_uart0_pins_default>;
+};
+
 &main_uart8 {
 	status = "okay";
 	pinctrl-names = "default";
-- 
2.40.0