Hello, On Thu, Apr 15, 2021 at 02:14:49PM +0200, Clemens Gruber wrote: > Implement .get_state to read-out the current hardware state. > > The hardware readout may return slightly different values than those > that were set in apply due to the limited range of possible prescale and > counter register values. > > Also note that although the datasheet mentions 200 Hz as default > frequency when using the internal 25 MHz oscillator, the calculated > period from the default prescaler register setting of 30 is 5079040ns. > > Signed-off-by: Clemens Gruber <clemens.gruber@xxxxxxxxxxxx> > --- > Changes since v8: > - As we left the math in apply as-is, use DIV_ROUND_DOWN in get_state I first thought this was wrong, because .apply uses ROUND_CLOSEST for period and ROUND_UP for duty. But as the calculation for period is exact this doesn't matter and round-down is indeed correct here. Reviewed-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx> Thanks Uwe -- Pengutronix e.K. | Uwe Kleine-König | Industrial Linux Solutions | https://www.pengutronix.de/ |
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