[alsa-devel] [PATCH v5 2/2] ASoC: samsung: Add machine driver for Exynos5433 based TM2 board

[Charles Keepax]

On Fri, Sep 02, 2016 at 12:49:51PM +0200, Sylwester Nawrocki wrote:
> On 08/30/2016 04:57 PM, Sylwester Nawrocki wrote:
> > I will use prepare/complete as with late_suspend/early_resume power
> > sequences are wrong as you point out. I still need to debug why
> > there is no errors reported when the SPI controller is suspended
> > while there are supposed to be done SPI bus transfers.
> 
> As it turns out the reason there is no any errors with late_suspend/
> early_resume is that the CODEC sets its regmap's "cache only" only flag
> in its suspend() callback and then clears it in resume().  So any SPI
> transfers which might happen when SPI controller is suspended
> are prevented this way.

Ah of course yeah should have realised that, but yeah you still
end up with the writes not actually reaching the hardware.

Thanks,
Charles