On Monday, November 14, 2016 8:27:05 PM CET Krzysztof Kozlowski wrote: > @@ -1497,7 +1497,7 @@ source kernel/Kconfig.preempt > config HZ_FIXED > int > default 200 if ARCH_EBSA110 || ARCH_S3C24XX || \ > - ARCH_S5PV210 || ARCH_EXYNOS4 > + ARCH_S5PV210 > default 128 if SOC_AT91RM9200 > default 0 After further research, I've concluded that we should also drop the settings for ARCH_S5PV210 and ARCH_S3C24XX here. ARCH_S5PV210 behaves exactly like EXYNOS here, it has 32-bit timers so there won't be any overflow with 100Hz. For ARCH_S3C24XX, it the requirement was that HZ_100 could not be used with the old arch/arm/plat-samsung/time.c code that would overflow its 16-bit counter. However, the new drivers/clocksource/samsung_pwm_timer.c configures the clock divider to '50' instead of '6', so there is no longer a 16-bit overflow before the 100Hz tick, it now overflows every 3.7ms for the typical 12MHz clock. Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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