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According to the IOControl register bits description in the page 31 of the product datasheet, we know the bit 3 of IOControl register is softreset, this bit will self-clearing once the reset finish. In the probe, the softreset bit is set, and when we read this register from debugfs/regmap interface, we found the softreset bit is still setting, this confused us for a while. Finally we found this register is cached, to read the real value from register, we could put it into the regmap_volatile(). Signed-off-by: Hui Wang <hui.wang@canonical.com> Link: https://lore.kernel.org/r/20230724034727.17335-1-hui.wang@canonical.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.