AM625: SK_EVM - How to add UART PRU to .dtsi?

- I have a Starter Kit Evaluation Module XAM6254ATCGGAALW

I need to configure the UART peripheral of the PRU through the .dtsi file.

Currently, the PRU part looks like this:

	pruss: pruss@30040000 {
		compatible = "ti,am625-pruss";
		reg = <0x00 0x30040000 0x00 0x80000>;
		power-domains = <&k3_pds 81 TI_SCI_PD_EXCLUSIVE>;
		#address-cells = <1>;
		#size-cells = <1>;
		ranges = <0x0 0x00 0x30040000 0x80000>;

		pruss_mem: memories@0 {
			reg = <0x0 0x2000>,
			      <0x2000 0x2000>,
			      <0x10000 0x10000>;
			reg-names = "dram0", "dram1", "shrdram2";
		};

		pruss_cfg: cfg@26000 {
			compatible = "ti,pruss-cfg", "syscon";
			reg = <0x26000 0x200>;
			#address-cells = <1>;
			#size-cells = <1>;
			ranges = <0x0 0x26000 0x2000>;

			clocks {
				#address-cells = <1>;
				#size-cells = <0>;

				pruss_coreclk_mux: coreclk-mux@3c {
					reg = <0x3c>;
					#clock-cells = <0>;
					clocks = <&k3_clks 81 0>,  /* pruss_core_clk */
						 <&k3_clks 81 20>; /* pruss_iclk */
					assigned-clocks = <&pruss_coreclk_mux>;
					assigned-clock-parents = <&k3_clks 81 20>;
				};

				pruss_iepclk_mux: iepclk-mux@30 {
					reg = <0x30>;
					#clock-cells = <0>;
					clocks = <&k3_clks 81 3>,	/* pruss_iep_clk */
						 <&pruss_coreclk_mux>;	/* pruss_coreclk_mux */
					assigned-clocks = <&pruss_iepclk_mux>;
					assigned-clock-parents = <&pruss_coreclk_mux>;
				};
			};
		};

		pruss_intc: interrupt-controller@20000 {
			compatible = "ti,pruss-intc";
			reg = <0x20000 0x2000>;
			interrupt-controller;
			#interrupt-cells = <3>;
			interrupts = <GIC_SPI 88 IRQ_TYPE_LEVEL_HIGH>,
				     <GIC_SPI 89 IRQ_TYPE_LEVEL_HIGH>,
				     <GIC_SPI 90 IRQ_TYPE_LEVEL_HIGH>,
				     <GIC_SPI 91 IRQ_TYPE_LEVEL_HIGH>,
				     <GIC_SPI 92 IRQ_TYPE_LEVEL_HIGH>,
				     <GIC_SPI 93 IRQ_TYPE_LEVEL_HIGH>,
				     <GIC_SPI 94 IRQ_TYPE_LEVEL_HIGH>,
				     <GIC_SPI 95 IRQ_TYPE_LEVEL_HIGH>;
			interrupt-names = "host_intr0", "host_intr1",
					  "host_intr2", "host_intr3",
					  "host_intr4", "host_intr5",
					  "host_intr6", "host_intr7";
		};

		pru0: pru@34000 {
			compatible = "ti,am625-pru";
			reg = <0x34000 0x3000>,
			      <0x22000 0x100>,
			      <0x22400 0x100>;
			reg-names = "iram", "control", "debug";
			firmware-name = "am62x-pru0-fw";
			interrupt-parent = <&pruss_intc>;
			interrupts = <16 2 2>;
			interrupt-names = "vring";
		};

		pru1: pru@38000 {
			compatible = "ti,am625-pru";
			reg = <0x38000 0x3000>,
			      <0x24000 0x100>,
			      <0x24400 0x100>;
			reg-names = "iram", "control", "debug";
			firmware-name = "am62x-pru1-fw";
			interrupt-parent = <&pruss_intc>;
			interrupts = <18 3 3>;
			interrupt-names = "vring";
		};
	};
};

Is it necessary to do this configuration in the .dtsi and build the firmware to be able to use uart with baremetal in code composer?

Would the setup be something like this?

pruss_uart: serial@28000 
{
        compatible = "ti,pruss-uart";
        reg = <0x28000 0x38>;
        interrupt-parent = <&pruss_intc>;
        status = "disabled";
};

If not, what would it look like?

- I also need to set up the multiplexing of the pins. I need to do this through .dtsi as well.

How do I do it?

Most of the TX/RX of the UART of the PRU interfere with the MII pins of the ethernet ports, so I separated the pins I want and their BALL in such a way as not to intervene:

My package is ALW, so it would be E15 and C15. How can I set them to function 6 and be UART TX/RX from PRU?