Re: [PATCH v2] pwm: imx27: Fix variable truncation in .apply()

[Uwe Kleine-König]

Hello Ronaldo,

On Fri, May 22, 2026 at 04:13:48PM -0300, Ronaldo Nunez wrote:
> Fix a variable truncation when calculating period in microseconds as
> part of the solution for the ERR051198 in .apply() callback.
> 
> Example scenario:
>  - Period of 3us (PWMPR = 196 and prescaler = 1)
>  - Expected value in tmp: 198000000000 (NSEC_PER_SEC * (196 + 2) * 1)
>  - Actual value is 431504384 (truncation to u32)
> 
> Signed-off-by: Ronaldo Nunez <rnunez@xxxxxxxxxxxx>

Thanks for your patch. I added

Fixes: a25351e4c774 ("pwm: imx27: Workaround of the pwm output bug when decrease the duty cycle")

to the trailers and applied it to

https://git.kernel.org/pub/scm/linux/kernel/git/ukleinek/linux.git pwm/fixes

. I haven't made up my mind if I create another pull request to get the
patches from the pwm/fixes branch into 7.1. If not, it will go into
7.2-rc1.

Sashiko found a few more issues in the imx27 driver, would you like to
address these, too?

Best regards
Uwe

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