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Subject: Re: [BUG ?] regmap: debugfs: WARN_ON at regmap-debugfs.c:151
From: Sergej Sawazki <ce3a@gmx.de>
Date: Mon, 15 Jun 2015 14:42:30 +0200
To: Mark Brown <broonie@kernel.org>
CC: gregkh@linuxfoundation.org, wsa@the-dreams.de,
        linux-kernel@vger.kernel.org
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Am 15. Juni 2015 11:49:22 MESZ, schrieb Mark Brown <broonie@kernel.org>:
>On Sat, Jun 13, 2015 at 03:21:02PM +0200, Sergej Sawazki wrote:
>
>> I did some debugging and found that regmap_readable(), at regmap-
>> debugfs.c:109, returns "false" for all registers, hence the
>> debugfs_off_cache list remains empty and we get an warning in line
>151.
>
>We need to change that code to special case write only register maps
>like this and just skip having a cache for those devices.  They
>normally
>have very small register maps anyway so it shouldn't have too big an
>impact on performance.

I'm having this issue with a wm8741 DAC, its register map is not "write only", it has readable and writeable registers.

-- 
Sergej
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