Problem with s3c24xx pwm driver

Vasily Khoruzhick anarsoul at gmail.com
Thu Sep 24 10:33:24 EDT 2009


В сообщении от 24 сентября 2009 01:25:46 вы написали:

> No, it doesn't.
> 
> So my suggestion at the moment is that you may:
> 
> 1. try dump the registers after pwm_enable() and see if all are setup
> correctly,
> 
> 2. and make sure those registers are write-able at that time (some
> SoC doesn't allow register writing when the controller is disabled).

Ok, I've found source of  problem: it seems to be some issue with backlight 
LED driver (hardware, not software) with selected PWM clock. It seems that  
part of period with "1" is not long enought to charge capacitor, or something 
like this. PWM itself works fine.

Sorry for buzz.

Regards
Vasily
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