linux-kernel - [PATCH 3/3] arm64: dts: ti: k3-am62a7-evm: Describe main_uart1 and wkup

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Message-ID: <20230418012717.1230882-4-nm@ti.com>
Date:   Mon, 17 Apr 2023 20:27:17 -0500
From:   Nishanth Menon <nm@...com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Vignesh Raghavendra <vigneshr@...com>
CC:     <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        Tero Kristo <kristo@...nel.org>, Nishanth Menon <nm@...com>,
        Bryan Brattlof <bb@...com>
Subject: [PATCH 3/3] arm64: dts: ti: k3-am62a7-evm: Describe main_uart1 and wkup_uart

wkup_uart and main_uart1 on this platform is used by tifs and DM
firmwares. Describe them for completeness including the pinmux.

Signed-off-by: Nishanth Menon <nm@...com>
---
 arch/arm64/boot/dts/ti/k3-am62a7-sk.dts | 36 +++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts b/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
index f6a67f072dca..8f0589f4921e 100644
--- a/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
+++ b/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
@@ -17,7 +17,9 @@ / {
 	model = "Texas Instruments AM62A7 SK";
 
 	aliases {
+		serial0 = &wkup_uart0;
 		serial2 = &main_uart0;
+		serial3 = &main_uart1;
 		mmc1 = &sdhci1;
 	};
 
@@ -114,6 +116,24 @@ led-0 {
 	};
 };
 
+&mcu_pmx0 {
+	wkup_uart0_pins_default: wkup-uart0-pins-default {
+		pinctrl-single,pins = <
+			AM62X_MCU_IOPAD(0x02c, PIN_INPUT, 0)	/* (C6) WKUP_UART0_CTSn */
+			AM62X_MCU_IOPAD(0x030, PIN_OUTPUT, 0)	/* (A4) WKUP_UART0_RTSn */
+			AM62X_MCU_IOPAD(0x024, PIN_INPUT, 0)	/* (B4) WKUP_UART0_RXD */
+			AM62X_MCU_IOPAD(0x028, PIN_OUTPUT, 0)	/* (C5) WKUP_UART0_TXD */
+		>;
+	};
+};
+
+/* WKUP UART0 is used for DM firmware logs */
+&wkup_uart0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&wkup_uart0_pins_default>;
+	status = "reserved";
+};
+
 &main_pmx0 {
 	main_uart0_pins_default: main-uart0-pins-default {
 		pinctrl-single,pins = <
@@ -122,6 +142,15 @@ AM62AX_IOPAD(0x1cc, PIN_OUTPUT, 0) /* (E14) UART0_TXD */
 		>;
 	};
 
+	main_uart1_pins_default: main-uart1-pins-default {
+		pinctrl-single,pins = <
+			AM62X_IOPAD(0x194, PIN_INPUT, 2)	/* (B19) MCASP0_AXR3.UART1_CTSn */
+			AM62X_IOPAD(0x198, PIN_OUTPUT, 2)	/* (A19) MCASP0_AXR2.UART1_RTSn */
+			AM62X_IOPAD(0x1ac, PIN_INPUT, 2)	/* (E19) MCASP0_AFSR.UART1_RXD */
+			AM62X_IOPAD(0x1b0, PIN_OUTPUT, 2)	/* (A20) MCASP0_ACLKR.UART1_TXD */
+		>;
+	};
+
 	main_i2c0_pins_default: main-i2c0-pins-default {
 		pinctrl-single,pins = <
 			AM62AX_IOPAD(0x1e0, PIN_INPUT_PULLUP, 0) /* (B16) I2C0_SCL */
@@ -254,6 +283,13 @@ &main_uart0 {
 	pinctrl-0 = <&main_uart0_pins_default>;
 };
 
+/* Main UART1 is used for TIFS firmware logs */
+&main_uart1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&main_uart1_pins_default>;
+	status = "reserved";
+};
+
 &usbss1 {
 	status = "okay";
 };
-- 
2.40.0