New help setup PWM for ambiq appolo3 evb using zephyr 4.3

[fbenamrouche]

Hello,
I'm not sure how to configure the dts overlay to setup properly the pwm on the apollo3 blue chip.
I have 3 leds, RGB, on gpio 13, 29 and 11
I can set them full on but pwm does not work. I may miss something but looking everywhere i see no example to setup the gpios or configure them to pwm.
My code is working on NRF and stm32, so I know that the issue is only with the dts configuration
I'm using the following overlay:

&pinctrl {
    pwm0_pinctrl: pwm0_pinctrl {
	    group1 {
		    pinmux = <GPIO_P13>;/* channel@1 */
        };
    };
};

&timer0 {
	pwm0: pwm {
	    label = "pwm0";
		timer-segment = "SEGMENT_B";
		pwm-type = "PWM_REPEAT";
		pinctrl-0 = <&pwm0_pinctrl>;
		pinctrl-names = "default";
		status = "okay";
	};
	status = "okay";
};

&pinctrl {
    pwm2_pinctrl: pwm2_pinctrl {
	    group1 {
		    pinmux = <GPIO_P29>;/* channel@1 */
        };
    };
};

&timer2 {
	pwm2: pwm {
	    label = "pwm2";
		timer-segment = "SEGMENT_A";
		pwm-type = "PWM_REPEAT";
		pinctrl-0 = <&pwm2_pinctrl>;
		pinctrl-names = "default";
		status = "okay";
	};
	status = "okay";
};

&pinctrl {
    pwm7_pinctrl: pwm7_pinctrl {
	    group1 {
		    pinmux = <GPIO_P11>;/* channel@1 */
        };
    };
};

&timer7 {
	pwm7: pwm {
	    label = "pwm7";
		timer-segment = "SEGMENT_B";
		pwm-type = "PWM_REPEAT";
		pinctrl-0 = <&pwm7_pinctrl>;
		pinctrl-names = "default";
		status = "okay";
	};
	status = "okay";
};

Thanks!

[fbenamrouche]

I changed the config to set pinctrl pinmux to proper CTX value like so, I see all the LEDs switching full on, but still not PWM variation:

&pinctrl {
    pwm0_pinctrl: pwm0_pinctrl {
	    group1 {
		    pinmux =<CTIM2_P13>;/* channel@1 */
        };
    };
};

&timer0 {
	pwm0: pwm {
	    label = "pwm0";
		timer-segment = "SEGMENT_B";
		pwm-type = "PWM_REPEAT";
		pinctrl-0 = <&pwm0_pinctrl>;
		pinctrl-names = "default";
		status = "okay";
	};
	status = "okay";
};

&pinctrl {
    pwm2_pinctrl: pwm2_pinctrl {
	    group1 {
		    pinmux =<CTIM9_P29>;/* channel@1 */
        };
    };
};

&timer2 {
	pwm2: pwm {
	    label = "pwm2";
		timer-segment = "SEGMENT_A";
		pwm-type = "PWM_REPEAT";
		pinctrl-0 = <&pwm2_pinctrl>;
		pinctrl-names = "default";
		status = "okay";
	};
	status = "okay";
};

&pinctrl {
    pwm7_pinctrl: pwm7_pinctrl {
	    group1 {
		    pinmux =<CTIM31_P11>;/* channel@1 */
        };
    };
};

&timer7 {
	pwm7: pwm {
	    label = "pwm7";
		timer-segment = "SEGMENT_B";
		pwm-type = "PWM_REPEAT";
		pinctrl-0 = <&pwm7_pinctrl>;
		pinctrl-names = "default";
		status = "okay";
	};
	status = "okay";
};

[RichardSWheatley]

west build -p -b apollo3_evb .\samples\drivers\led\pwm
The standard apollo3_evb.dts file along with the overlay for this sample work.

[fariouche]

thanks, found the mistake on my side!

[fariouche]

In the pinctrl, is it normal to set to GPIO_P11 like in the sample dts? shouldn't it be CTIM31_P11 as per the datasheet?