Hello,

On Tue, May 04, 2021 at 11:13:27AM -0500, Bjorn Andersson wrote:

On Tue 04 May 10:43 CDT 2021, Pavel Machek wrote:

quoted

quoted

So downstream they have (last time I looked at the code) an addition in
the PWM API where the LED driver can inform the PWM driver part about
the indices to use. Naturally I don't think that's a good idea.

Dunno. Is it bad idea?

pattern support for other PWMs (vibration?) seems useful, too. Yes, it
means more discussion and extending PWMs properly..

@Thierry, @Lee, @Uwe, are you interested in extending the PWM api with
some sort of support for specifying an array of "duty_cycle" and some
property for how fast the hardware should cycle through those duty
cycles? (And I need a bit/bool to indicate if the pattern should run
once of be repeated)

The (current) use case relates to being able to alter the duty cycle
over time to create "effects" such as pulsing an LED.

My personal opinion here is that this is too special to be worth the
generalisation.

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |