Add a PWM pin on BeagleBone Black

I need to add two new PWM pins to my DTS file on a BeagleBone Black. How can I do that?

It has the P9_42 as the PWM pin, but I'm having some difficulty in adding another PWM pin. I'll use in mg90 for college work. I'm using Linux 6.0.0 as the kernel and Buildroot to generate the rootfs. I needed more two pins as PWM.

My current DTS file is am335x-evm:

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2012 Texas Instruments Incorporated - https://www.ti.com/
 */
/dts-v1/;

#include "am33xx.dtsi"
#include <dt-bindings/interrupt-controller/irq.h>

/ {
    model = "TI AM335x EVM";
    compatible = "ti,am335x-evm", "ti,am33xx";

    cpus {
        cpu@0 {
            cpu0-supply = <&vdd1_reg>;
        };
    };

    memory@80000000 {
        device_type = "memory";
        reg = <0x80000000 0x10000000>; /* 256 MB */
    };


    backlight: backlight {
        compatible = "pwm-backlight";
        pwms = <&ecap0 0 50000 0>;
        brightness-levels = <0 51 53 56 62 75 101 152 255>;
        default-brightness-level = <8>;
    };

    panel {
        compatible = "tfc,s9700rtwv43tr-01b";

        pinctrl-names = "default";
        pinctrl-0 = <&lcd_pins_s0>;
        backlight = <&backlight>;

        port {
            panel_0: endpoint@0 {
                remote-endpoint = <&lcdc_0>;
            };
        };
    };

&am33xx_pinmux {
    pinctrl-names = "default";
    pinctrl-0 = <&matrix_keypad_s0 &volume_keys_s0 &clkout2_pin>;

    ecap0_pins: backlight_pins {
        pinctrl-single,pins = <
            AM33XX_PADCONF(AM335X_PIN_ECAP0_IN_PWM0_OUT, 0x0, MUX_MODE0)
        >;
    };

&epwmss0 {
    status = "okay";

    ecap0: pwm@100 {
        status = "okay";
        pinctrl-names = "default";
        pinctrl-0 = <&ecap0_pins>;
    };
};