Re: [PATCH 0/2] pwm: axi-pwmgen: always enable FORCE_ALIGN

[Uwe Kleine-König]

Hello David,

On Wed, Oct 09, 2024 at 04:11:48PM -0500, David Lechner wrote:
> When using the axi-pwmgen as a trigger for ADCs, we've found that the
> default behavior of the PWMGEN IP block is not ideal. The default
> behavior is to wait for the period of all PWM outputs to run out before
> applying any new settings. But there isn't a way to block until this
> happens (and even if there was, it could take a long time). So the
> pwm apply function returns before the new settings are actually applied.
> 
> This makes certain use cases impossible. For example, to use the PWM
> like a GPIO to create a single pulse on and off to trigger a single ADC
> conversion.
> 
> The AXI PWMGEN has a FORCE_ALIGN configuration option that changes the
> behavior so that any new output settings (period, duty cycle, etc.) are
> applied immediately. This can cause glitches in the output, but makes
> the PWM actually useable for most applications.
> 
> Also, there was a naming conflict with register names, so there is a
> preliminary cleanup patch to sort that out.

Applied with Nuno's review-tag.

Thanks
Uwe

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