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CONFIG_AT91_TIMER_HZ: Kernel HZ (jiffies per second)

General informations

The Linux kernel configuration item CONFIG_AT91_TIMER_HZ:

• prompt: Kernel HZ (jiffies per second)
• type: int
• depends on: ( CONFIG_ARCH_AT91 ) && ( CONFIG_ARCH_AT91RM9200 )
• defined in arch/arm/mach-at91/Kconfig
• found in Linux kernels: 2.6.25–2.6.39, 3.0–3.9, 3.10-rc+HEAD

Help text

On AT91rm9200 chips where you're using a system clock derived from the 32768 Hz hardware clock, this tick rate should divide it exactly: use a power-of-two value, such as 128 or 256, to reduce timing errors caused by rounding.

On AT91sam926x chips, or otherwise when using a higher precision system clock (of at least several MHz), rounding is less of a problem so it can be safer to use a decimal values like 100.

Hardware

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