Re: da9030: ldo11 ignores disable

[Jonathan Cameron <jic23@cam.ac.uk>]

Liam Girdwood wrote:
> On Thu, 2009-06-25 at 15:39 +0000, Jonathan Cameron wrote:
>> Hi All,
>>
>> Whilst testing a regulator machine config I've run into a weird issue.
>>
>> The preliminary data sheet I have suggests that there are two enable
>> registers
>> for ldo11 but neither rctl22 or rctl11 seems to have any effect (on
>> their own
>> or both cleared together). I can change the voltage just fine, but not
>> actually turn it off.
>>
>> Anyone come across this problem or have any idea what is going on?
> 
> I've come across something similar in the past with two enable bits
> causing I2C register cache coherency issues. The cache bits became out
> of sync with reality and stopped some I2C writes happening.
Don't thing that could happen here.
> 
> Another option is that your hardware config doesn't allow ldo11 to be
> disabled ?
Other than the obvious possibility that the hardware has a bug, I can't
seem to find a reason why this shouldn't work.

Thanks,

Jonathan