PWM trouble and drive strength

Zero Series
8

Hello
I try like the forum discussionthere with linuxlion, but like him no change…

So i try to understand what you tell me and i try this 'fragment@03 ( is this really that you want to say ?):

/dts-v1/;

/ {
	compatible = "radxa,zero\0amlogic,g12a";

	fragment@0 {
		target = < 0xffffffff >;

		__overlay__ {
			status = "okay";
			pinctrl-0 = < 0xffffffff >;
			pinctrl-names = "default";
			clocks = < 0xffffffff >;
			clock-names = "clkin3";
		};
	};
        fragment@1 {
                target = "pwm-ao-a";
                __overlay__ {
                                mux {
                                        groups = "pwm_ao_a";
                                        function = "pwm_ao_a";
                                        bias-disable;
                                        drive-strength-microamp = <4000>;
                                };
		};
	};
	fragment@2 {
		target = "gpio_xg";
		__overlay__ {
				mux {
					groups = "GPIOAO_9";
					function = "gpio_aobus";
					bias_disable;
					drive-strength-microamp = <4000>;
				};
                };
        };
	fragment@3 {
                target = "uart-ao-b-tx-8-rx-9";
                __overlay__ {
                                mux {
                                        groups = "uart_ao_b_rx_9";
                                        function = "gpio_aobus";
                                        bias_disable;
                                        drive-strength-microamp = <4000>;
                                };
                };
        };

But same result, no change. So i really don’t know how to change for example GPIOAO_9 drive strength in device tree. If you have a solution, i get it.
I found an other method to change the drive strength. The alternative is to use /dev/mem and busybox (or other mechanism) to write directly to register ( And i hope the S905Y2 have the same register than the S905D3) like that:
`

busybox devmem 0xFF80001c w 0x00CC0000

But I rather the devicetree solution, if you have an idea.
Best regards
`