Re: [PATCH 2/2] ASoC: tlv320adcx140: Wake up codec before accessing register

[Dan Murphy]

Camel

On 9/8/20 6:49 AM, Dan Murphy wrote:
> Camel
>
> On 9/8/20 3:35 AM, Camel Guo wrote:
> > From: Camel Guo <camelg@xxxxxxxx>
> >
> > According to its datasheet, after reset this codec goes into sleep
> > mode. In this mode, any register accessing should be avoided except for
> > exiting sleep mode. Hence this commit moves SLEEP_CFG access before any
> > register accessing.
>
> This is interesting because our HW team suggested putting the device 
> into sleep mode when doing register writes/reads because they were 
> finding abnormalities in the register settings when the device is active.
>
> I have a local patch that changes this as well that the HW team 
> requested.


OK I have clarification on this now.  Their original request was 
incorrect they indicate the BIAS, ADC and PLLs be powered down during 
writes and reads.


> Mark
>
> Let me run this by the HW team first before applying this patch.

Mark

Acked-by: Dan Murphy <dmurphy@xxxxxx>


> Dan