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R-Car V4H Reference Manual R19UH0186EJ0130 Rev.1.30 Apr. 21, 2025 page
583 Figure 9.3.1(a) Software Reset flow (A) as well as flow (B) / (C)
indicate after reset has been asserted by writing a matching reset bit
into register SRCR, it is mandatory to wait 1ms.
This 1ms delay is documented on R-Car V4H and V4M, it is currently
unclear whether S4 is affected as well. This patch does apply the extra
delay on R-Car S4 as well.
Fix the reset driver to respect the additional delay when toggling
resets. Drivers which use separate reset_control_(de)assert() must
assure matching delay in their driver code.
Fixes:
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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 reStructuredText 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.