linux-kernel - [PATCH 6/8] arm64: dts: ti: k3-am69-sk: Add mcu and wakeup uarts

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Message-ID: <20230602214937.2349545-7-nm@ti.com>
Date:   Fri, 2 Jun 2023 16:49:35 -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 6/8] arm64: dts: ti: k3-am69-sk: 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-am69-sk.dts | 31 +++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am69-sk.dts b/arch/arm64/boot/dts/ti/k3-am69-sk.dts
index ae41ff6249a1..409fcbaf0126 100644
--- a/arch/arm64/boot/dts/ti/k3-am69-sk.dts
+++ b/arch/arm64/boot/dts/ti/k3-am69-sk.dts
@@ -21,6 +21,8 @@ chosen {
 	};
 
 	aliases {
+		serial0 = &wkup_uart0;
+		serial1 = &mcu_uart0;
 		serial2 = &main_uart8;
 		mmc1 = &main_sdhci1;
 		i2c3 = &main_i2c0;
@@ -141,6 +143,22 @@ J784S4_IOPAD(0x0C4, PIN_INPUT, 7) /* (AD36) ECAP0_IN_APWM_OUT.GPIO0_49 */
 };
 
 &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(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 */
@@ -166,6 +184,19 @@ 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