PWM not workig on tegra234-j401-p3767-recomputer

[anischali]

Hello every, need some help please on integrating the PWM1/PWM7 on the external header of the dev kit using seeed-j4012 carrier with jetson orin nx 16G SOM, here my device tree configuration

Note:

• I already added the support of pwm of backlight in fbtft-core.
• I see all my data on the spi interface and they are coherent.
• I see my pwm backlight instance in sysfs and also as a consumer of pwmchip3 (pwm@32e0000).
• I see my pinmux is applyed.
• all my drivers are probed form fbtft, pwm, backlight...

I noticed that if we take the jetPack 6.1/6.2 it works only if we use jetson-io to generate an overlay.

Does anyone faced this kind of issue.

/ {
    bus@0 {
        
		backlight_enable: regulator-backlight-enable {
			compatible = "regulator-fixed";
			regulator-name = "BACKLIGHT_ENABLE";
			regulator-min-microvolt = <3300000>;
			regulator-max-microvolt = <3300000>;
			gpio = <&gpio TEGRA234_MAIN_GPIO(N, 1) GPIO_ACTIVE_HIGH>;
			enable-active-high;
		};

        pwm@32e0000 {
			pinctrl-names = "default";
			pinctrl-0 = <&pwm7_pinmux>;
			status = "okay";
		};

         pwm_backlight: pwm-backlight@7 {
			compatible = "pwm-backlight";
			power-supply = <&backlight_enable>;
			pwms = <&pwm7 0 45334>;
		        brightness-levels = <0 51 53 56 62 75 101 152 255>;
			default-brightness-level = <7>;
			status = "okay";
	    };

		spi_hdr40: spi@3210000 {
			num-cs = <1>;
			cs-gpios = <&gpio TEGRA234_MAIN_GPIO(Z, 6) GPIO_ACTIVE_LOW>;
			status = "okay";
            
            /delete-node/ spi@0;

			display@0 {
				compatible = "sitronix,st7789v";
				pinctrl-names = "default";
				pinctrl-0 = <&spi1_pinmux>;
				backlight = <&pwm_backlight>;
                spi-max-frequency = <25000000>;
				reset-gpios = <&gpio TEGRA234_MAIN_GPIO(AC, 6) GPIO_ACTIVE_LOW>;
				dc-gpios = <&gpio TEGRA234_MAIN_GPIO(Z, 7) GPIO_ACTIVE_HIGH>;
				spi-cs-high;
				width = <320>;
				height = <240>;
				buswidth = <8>;
                of_backlight = <1>;
				reg = <0>;
				status = "okay";
			};
		};
    };
};

&pinmux {
	pwm7_pinmux: pinmux-pwm7 {
		hdr40-pin32 {
			nvidia,pins = "soc_gpio19_pg6";
			nvidia,function = "gp";
			nvidia,pin-group = "pwm7";
			nvidia,tristate = <TEGRA_PIN_DISABLE>;
			nvidia,enable-input = <TEGRA_PIN_DISABLE>;		
		};
		
		hdr40-pin15 {
			nvidia,pins = "soc_gpio39_pn1";
			nvidia,function = "gp";
			nvidia,pin-group = "pwm1";
			nvidia,tristate = <TEGRA_PIN_DISABLE>;
			nvidia,enable-input = <TEGRA_PIN_DISABLE>;
		};
	};

	spi1_pinmux: pinmux-spi1 {

		hdr40-pin23 {
			nvidia,pins = "spi1_sck_pz3";
			nvidia,function = "spi1";
			nvidia,pin-label = "spi1_sck";
			nvidia,tristate = <TEGRA_PIN_DISABLE>;
			nvidia,enable-input = <TEGRA_PIN_ENABLE>;
		};
		
		hdr40-pin24 {
			nvidia,pins = "spi1_cs0_pz6";
			nvidia,function = "spi1";
			nvidia,pin-label = "spi1_cs0";
			nvidia,tristate = <TEGRA_PIN_DISABLE>;
			nvidia,enable-input = <TEGRA_PIN_ENABLE>;
		};

		hdr40-pin19 {
			nvidia,pins = "spi1_mosi_pz5";
			nvidia,function = "spi1";
			nvidia,pin-label = "spi1_dout";
			nvidia,tristate = <TEGRA_PIN_DISABLE>;
			nvidia,enable-input = <TEGRA_PIN_ENABLE>;
		};

		hdr40-pin26 {
			nvidia,pins = "spi1_cs1_pz7";
			nvidia,function = "spi1";
			nvidia,pin-label = "spi1_cs1";
			nvidia,tristate = <TEGRA_PIN_DISABLE>;
			nvidia,enable-input = <TEGRA_PIN_ENABLE>;
		};
	};
};