Messages in this thread | | | Date | Mon, 03 Nov 2014 18:45:59 +0100 | From | Janusz Użycki <> | Subject | Re: [PATCH] clk: Add PWM clock driver |
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W dniu 2014-09-27 o 22:01, Mike Turquette pisze: > Quoting Thierry Reding (2014-09-23 01:51:31) >> On Wed, Sep 10, 2014 at 10:05:17PM +0200, Janusz Użycki wrote: >>> Hi, >>> >>> http://patchwork.ozlabs.org/patch/359069/ >>> https://lkml.org/lkml/2014/6/12/186 >>> >>> Will the patch ever included to linux-next? >> I've never seen this patch before. From a quick look it doesn't seem >> like it would work as is, but the idea is certainly interesting. If >> somebody decides to continue work on it, please Cc me and the linux-pwm >> mailing list. > I just merged a gpio-controlled clock gate and I'm fine with a PWM clock > output. > > Janusz, how are you testing the clock driver?
Sorry, I didn't noticed the email. I didn't test the patch yet. However I plan to check it this year.
best regards Janusz
> > Regards, > Mike > >>> pwm_config() API could be extended to support >>> not only period [ns] and duty [ns] time >>> but also frequency [Hz] and duty cycle fraction [1/1000?] >>> (instead of time in ns) as parameters. >>> Then ns (rounded by pwm) to freq. conversion problem >>> inclk_pwm_recalc_rate() usingpwm_get_period() >>> could be avoided. >>> To extend the API pwm_config() can support >>> new flags forduty_ns and period_ns, >>> eg. PWM_DUTY_PERCENT and PWM_PERIOD_HZ. >> Is that rounding really a problem? Also the PWM chips will most likely >> use the concept of period and duty-cycle internally anyway, so it will >> convert back from Hz/percentage to nanoseconds and fall victim to >> similar rounding effects. >> >> Thierry >
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