Messages in this thread | | | From | Sven Van Asbroeck <> | Date | Tue, 4 Jun 2019 09:34:46 -0400 | Subject | Re: [PATCH] pwm: pca9685: fix pwm/gpio inter-operation |
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Thank you for the review, Mika ! See comments below.
On Tue, Jun 4, 2019 at 5:14 AM Mika Westerberg <mika.westerberg@linux.intel.com> wrote: > > > This approach will also prevent the request of the "all" pwm channel, if any > > other pwm channel is already in use. Is this correct behaviour? > > Sounds correct to me.
Something that occurred to me right after I pressed the send button:
This patch will prevent a pwm 'all channels' request if at least one of the pwm's is in use. But it will not guard against the opposite: after the 'all channels' pwm is requested, it will still allow requests for other pwms/gpios !
This is identical to the old behaviour. But maybe this is an oversight and not a feature?
Proposal: 1. prevent request of 'all channel' if any of the pwms/gpios are in use 2. prevent request of all other pwms/gpios if 'all channels' is in use
> > Can we call it pca9685_pwm_test_and_set_inuse() following naming of > test_and_set_bit()?
Sounds good to me.
> > > > +static void pca9685_pwm_clear_inuse(struct pca9685 *pca, struct pwm_device *pwm) > > I think it might be better if you provide __pca9685_pwm_clear_inuse() > that does not take the lock and then pca9685_pwm_clear_inuse() that just > calls the former. Then ->
I agree, this is much cleaner.
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