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[ Upstream commit2c77734642] The left time value is wrong when we get it by sysfs. The left time value should be equal to preset timeout value minus elapsed time value. According to the Meson-GXB/GXL datasheets which can be found at [0], the timeout value is saved to BIT[0-15] of the WATCHDOG_TCNT, and elapsed time value is saved to BIT[16-31] of the WATCHDOG_TCNT. [0]: http://linux-meson.com Fixes:683fa50f0e("watchdog: Add Meson GXBB Watchdog Driver") Signed-off-by: Xingyu Chen <xingyu.chen@amlogic.com> Acked-by: Neil Armstrong <narmstrong@baylibre.com> Reviewed-by: Kevin Hilman <khilman@baylibre.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org> Signed-off-by: Sasha Levin <sashal@kernel.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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.