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SubjectRe: Using regmap_update_bits to update a write only register
On 03/06/2015 12:21 PM, Mark Brown wrote:
> On Thu, Mar 05, 2015 at 08:14:14PM +0200, Daniel Baluta wrote:
>> On Mar 5, 2015 7:54 PM, "Mark Brown" <broonie@kernel.org> wrote:
>
>>> Probably, or there's a bug. What should happen is that if the register
>>> default appeared successfully then the read will get statisfied from the
>>> cache in the manner you describe - presumably that's gone wrong somehow.
>>> Have you set num_reg_defaults? That's the obvious thing...
>
>> Did that. I will have a closer look. Thanks for the answer.
>
> OK, the other thing that springs to mind to check is that the register
> didn't somehow get marked as volatile.
>

There were some bugs in the past were non-readable register automatically
got marked as volatile, this has been fixed though a few months ago. Try to
make sure you use the latest upstream version of regmap.

- Lars


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