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cd3a53b727
Add a clock_ns_to_ticks() function which does the opposite of clock_ticks_to_ns(): given a duration in nanoseconds, it returns the number of clock ticks that would happen in that time. This is useful for devices that have a free running counter register whose value can be calculated when it is read. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Luc Michel <luc@lmichel.fr> Reviewed-by: Hao Wu <wuhaotsh@google.com> Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-id: 20210219144617.4782-4-peter.maydell@linaro.org