Messages in this thread | | | Date | Wed, 26 Feb 2020 16:10:34 +0100 | From | Uwe Kleine-König <> | Subject | Re: [PATCH 1/4] pwm: pca9685: remove unused duty_cycle struct element |
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Hello Matthias,
as you seem to have this hardware on your desk, it would be great if you could answer the following questions:
- Does the hardware complete the currently running period before applying a new setting? - Is this racy somehow (i.e. can it happen that when going from duty_cycle/period = 1000/5000 to duty_cycle/period = 4000/10000 the output is 1000/10000 (or 4000/5000) for one cycle)? - Does the hardware complete the currently running period before .enabled = false is configured? - How does the output pin behave on a disabled PWM. (Usual candidates are: freeze where is just happens to be, constant inactive and High-Z).
Best regards Uwe
-- Pengutronix e.K. | Uwe Kleine-König | Industrial Linux Solutions | https://www.pengutronix.de/ |
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