Re: [PATCH v4 1/9] iio: dac: mcp47feb02: initialize dac_data field in channel data struct at probe

Jonathan Cameron <[email protected]>
Newsgroups org.kernel.vger.linux-devicetree,org.kernel.vger.linux-iio,org.kernel.vger.linux-kernel
Message-ID <20260823015100.74b6f615@jic23-huawei> 
On Wed, 19 Aug 2026 17:17:11 +0300
Andy Shevchenko <[email protected]> wrote:

> On Wed, Aug 19, 2026 at 03:41:05PM +0300, Ariana Lazar wrote:
> > Read DAC value register to initialize corresponding field in channel_data
> > struct when the module is inserted.  
> 
> Since we have a cache enabled for regmap, can we rather read back initial HW
> values at the probe time for all non-volatile or precise registers?
> 

That should indeed be explored.  This is also missing any description of 'why'
this needs to be read and cached at all.

Jonathan
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