Re: Using regmap_update_bits to update a write only register
From: Lars-Peter Clausen
Date: Fri Mar 06 2015 - 07:45:45 EST
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@xxxxxxxxxx> 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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