On 26/09/2013 09:34, Milo Kim wrote: > > Ah, I didn't mean the pinctrl subsystem. Sorry for confusing you. > > I just want to know the reason why 'atmel_pwm_disable()' releases the > PWM pin. > I can't find it in the driver. Am I missing something? > Hum, maybe my wording was wrong. What I meant is that when that disabling the PWM channel by using the PWM_DIS register, the PWM is not driving the pin anymore. Then, the level goes from low (which is correct) to high. Also, the datasheet specifies that the pwm has to be enabled to get the correct level when duty == 0 or duty == period. IIRC, this is not the same on TI SoC where duty == 0 don't give you the expected behavior and I can understand why there is a pwm_disable() there. Maybe we have to have a way to differentiate both cases ? -- Alexandre Belloni, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com -- To unsubscribe from this list: send the line "unsubscribe linux-leds" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
