arm64: dts: ti: k3-am65: Enable UART nodes at the board level

UART nodes defined in the top-level AM65x SoC dtsi files are incomplete
and may not be functional unless they are extended with pinmux
information.

As the pinmux is only known at the board integration level, these
nodes should only be enabled when provided with this information.

Disable the UART nodes in the dtsi files and only enable the ones that
are actually pinned out on a given board.
Signed-off-by: Andrew Davis <afd@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Tested-by: Jan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: Bryan Brattlof <bb@ti.com>
Link: https://lore.kernel.org/r/20221028142417.10642-2-afd@ti.com

arch/arm64/boot/dts/ti/k3-am65-iot2050-common.dtsi

@@ -360,15 +360,13 @@ &wkup_uart0 {
 };
 
 &main_uart1 {
+	status = "okay";
 	pinctrl-names = "default";
 	pinctrl-0 = <&main_uart1_pins_default>;
 };
 
-&main_uart2 {
-	status = "disabled";
-};
-
 &mcu_uart0 {
+	status = "okay";
 	pinctrl-names = "default";
 	pinctrl-0 = <&arduino_uart_pins_default>;
 };

arch/arm64/boot/dts/ti/k3-am65-main.dtsi

@@ -91,6 +91,7 @@ main_uart0: serial@2800000 {
 		clock-frequency = <48000000>;
 		current-speed = <115200>;
 		power-domains = <&k3_pds 146 TI_SCI_PD_EXCLUSIVE>;
+		status = "disabled";
 	};
 
 	main_uart1: serial@2810000 {
@@ -99,6 +100,7 @@ main_uart1: serial@2810000 {
 		interrupts = <GIC_SPI 193 IRQ_TYPE_LEVEL_HIGH>;
 		clock-frequency = <48000000>;
 		power-domains = <&k3_pds 147 TI_SCI_PD_EXCLUSIVE>;
+		status = "disabled";
 	};
 
 	main_uart2: serial@2820000 {
@@ -107,6 +109,7 @@ main_uart2: serial@2820000 {
 		interrupts = <GIC_SPI 194 IRQ_TYPE_LEVEL_HIGH>;
 		clock-frequency = <48000000>;
 		power-domains = <&k3_pds 148 TI_SCI_PD_EXCLUSIVE>;
+		status = "disabled";
 	};
 
 	crypto: crypto@4e00000 {

arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi

@@ -22,11 +22,12 @@ phy_gmii_sel: phy@4040 {
 
 	mcu_uart0: serial@40a00000 {
 		compatible = "ti,am654-uart";
-			reg = <0x00 0x40a00000 0x00 0x100>;
-			interrupts = <GIC_SPI 565 IRQ_TYPE_LEVEL_HIGH>;
-			clock-frequency = <96000000>;
-			current-speed = <115200>;
-			power-domains = <&k3_pds 149 TI_SCI_PD_EXCLUSIVE>;
+		reg = <0x00 0x40a00000 0x00 0x100>;
+		interrupts = <GIC_SPI 565 IRQ_TYPE_LEVEL_HIGH>;
+		clock-frequency = <96000000>;
+		current-speed = <115200>;
+		power-domains = <&k3_pds 149 TI_SCI_PD_EXCLUSIVE>;
+		status = "disabled";
 	};
 
 	mcu_ram: sram@41c00000 {

arch/arm64/boot/dts/ti/k3-am65-wakeup.dtsi

@@ -54,6 +54,7 @@ wkup_uart0: serial@42300000 {
 		clock-frequency = <48000000>;
 		current-speed = <115200>;
 		power-domains = <&k3_pds 150 TI_SCI_PD_EXCLUSIVE>;
+		status = "disabled";
 	};
 
 	wkup_i2c0: i2c@42120000 {

arch/arm64/boot/dts/ti/k3-am6528-iot2050-basic-common.dtsi

@@ -50,6 +50,7 @@ AM65X_IOPAD(0x0194, PIN_INPUT,  1)  /* (E24) UART0_RIN */
 };
 
 &main_uart0 {
+	status = "okay";
 	pinctrl-names = "default";
 	pinctrl-0 = <&main_uart0_pins_default>;
 };

arch/arm64/boot/dts/ti/k3-am654-base-board.dts

@@ -271,7 +271,13 @@ &wkup_uart0 {
 	status = "reserved";
 };
 
+&mcu_uart0 {
+	status = "okay";
+	/* Default pinmux */
+};
+
 &main_uart0 {
+	status = "okay";
 	pinctrl-names = "default";
 	pinctrl-0 = <&main_uart0_pins_default>;
 	power-domains = <&k3_pds 146 TI_SCI_PD_SHARED>;

arch/arm64/boot/dts/ti/k3-am6548-iot2050-advanced-common.dtsi

@@ -50,7 +50,3 @@ &sdhci0 {
 	ti,driver-strength-ohm = <50>;
 	disable-wp;
 };
-
-&main_uart0 {
-	status = "disabled";
-};