Messages in this thread | | | Date | Fri, 06 Mar 2015 13:45:37 +0100 | From | Lars-Peter Clausen <> | Subject | Re: Using regmap_update_bits to update a write only register |
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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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