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On newer boards the TC can be read as single 32 bit value without locking. Thus the clock can be used as reference for sched_clock which is much more accurate than the jiffies implementation. Tested on a Atmel SAMA5D2 board. Signed-off-by: David Engraf <david.engraf@sysgo.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. 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.