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Date:   Tue, 28 May 2019 14:26:32 +0100
From:   Mark Brown <>
To:     Andy Duan <>
Cc:     "" <>,
        "" <>,
        Robby Cai <>,
        "" <>,
        linux-kernel <>
Subject: Re: Issue: regmap: use debugfs even when no device

On Tue, May 28, 2019 at 02:20:15AM +0000, Andy Duan wrote:

> So on i.MX8MM/8QM/8QXP platforms, we catch the issue that user dump regmap registers without
> power cause system hang.
> Maybe revert the patch is more reasonable ?

This is an issue with or without a device - you can have the same issue
with devices that are powered off.  Typically where power is dynamic the
driver will use a register cache so the registers are always available.

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