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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