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Date:   Wed, 16 Sep 2020 17:28:24 +0100
From:   Mark Brown <>
To:     Ricardo Ribalda <>
Cc:     Greg Kroah-Hartman <>,
        "Rafael J. Wysocki" <>,, Ricardo Ribalda <>
Subject: Re: [PATCH] regmap: Add support for 12/20 register formatting

On Wed, Sep 16, 2020 at 06:05:52PM +0200, Ricardo Ribalda wrote:
> From: Ricardo Ribalda <>
> Devices such as the AD5628 require 32 bits of data divided in 12 bits
> for dummy, command and address, and 20 for data and dummy.

What exactly is the format you're trying to describe here?  It sounds
like there's two blocks of padding in here (I'm assuing that's what
dummy means) but what's the exact arrangement here and what are the
commands?  It sounds like this might not work ideally with things like
the cache code (if it makes things seems sparser than they are) and
might not be obvious to someone looking at the datsheet.

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