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

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Message-ID: <20230425214311.546191-1-bb@ti.com>
Date:   Tue, 25 Apr 2023 16:43:11 -0500
From:   Bryan Brattlof <bb@...com>
To:     Nishanth Menon <nm@...com>, Vignesh Raghavendra <vigneshr@...com>,
        Tero Kristo <kristo@...nel.org>
CC:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        ARM Linux Mailing List <linux-arm-kernel@...ts.infradead.org>,
        Device Tree Mailing List <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Bryan Brattlof <bb@...com>
Subject: [PATCH] arm64: dts: ti: k3-am62a7-sk: Describe main_uart1 and wkup_uart

From: Nishanth Menon <nm@...com>

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>
[bb@...com: updated pinmux and commit subject]
Signed-off-by: Bryan Brattlof <bb@...com>
---

Changes from v1: [0]
- Updated $subject to align with previous commits

[0] https://lore.kernel.org/linux-devicetree/20230424183355.68360-1-bb@ti.com/


 arch/arm64/boot/dts/ti/k3-am62a7-sk.dts | 40 +++++++++++++++++++++++--
 1 file changed, 38 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts b/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
index f6a67f072dca6..65caa5611d6d5 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;
 	};
 
@@ -114,11 +116,38 @@ led-0 {
 	};
 };
 
+&mcu_pmx0 {
+	wkup_uart0_pins_default: wkup-uart0-pins-default {
+		pinctrl-single,pins = <
+			AM62AX_MCU_IOPAD(0x0024, PIN_INPUT, 0) /* (C9) WKUP_UART0_RXD */
+			AM62AX_MCU_IOPAD(0x0028, PIN_OUTPUT, 0) /* (E9) WKUP_UART0_TXD */
+			AM62AX_MCU_IOPAD(0x002c, PIN_INPUT, 0) /* (C10) WKUP_UART0_CTSn */
+			AM62AX_MCU_IOPAD(0x0030, PIN_OUTPUT, 0) /* (C8) WKUP_UART0_RTSn */
+		>;
+	};
+};
+
+/* 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 = <
-			AM62AX_IOPAD(0x1c8, PIN_INPUT, 0) /* (D14) UART0_RXD */
-			AM62AX_IOPAD(0x1cc, PIN_OUTPUT, 0) /* (E14) UART0_TXD */
+			AM62AX_IOPAD(0x1c8, PIN_INPUT, 0) /* (E14) UART0_RXD */
+			AM62AX_IOPAD(0x1cc, PIN_OUTPUT, 0) /* (D15) UART0_TXD */
+		>;
+	};
+
+	main_uart1_pins_default: main-uart1-pins-default {
+		pinctrl-single,pins = <
+			AM62AX_IOPAD(0x01e8, PIN_INPUT, 1) /* (C17) I2C1_SCL.UART1_RXD */
+			AM62AX_IOPAD(0x01ec, PIN_OUTPUT, 1) /* (E17) I2C1_SDA.UART1_TXD */
+			AM62AX_IOPAD(0x0194, PIN_INPUT, 2) /* (C19) MCASP0_AXR3.UART1_CTSn */
+			AM62AX_IOPAD(0x0198, PIN_OUTPUT, 2) /* (B19) MCASP0_AXR2.UART1_RTSn */
 		>;
 	};
 
@@ -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";
 };

base-commit: 891db0c48efb48c3af334006f9d7ea6a0aa49cb9
-- 
2.40.0