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CONFIG_OMAP_32K_TIMER: Use 32KHz timer

General informations

The Linux kernel configuration item CONFIG_OMAP_32K_TIMER has multiple definitions:

Use 32KHz timer found in arch/arm/mach-omap/Kconfig

The configuration item CONFIG_OMAP_32K_TIMER:

• prompt: Use 32KHz timer
• type: bool
• depends on: CONFIG_ARCH_OMAP16XX
• defined in arch/arm/mach-omap/Kconfig
• found in Linux kernels: 2.6.12

Help text

Select this option if you want to enable the OMAP 32KHz timer. This timer saves power compared to the OMAP_MPU_TIMER, and has support for no tick during idle. The 32KHz timer provides less intra-tick resolution than OMAP_MPU_TIMER. The 32KHz timer is currently only available for OMAP-16xx.

Use 32KHz timer found in arch/arm/plat-omap/Kconfig

The configuration item CONFIG_OMAP_32K_TIMER:

• prompt: Use 32KHz timer
• type: bool
• depends on: ( CONFIG_ARCH_OMAP16XX || CONFIG_ARCH_OMAP2PLUS ) && (( CONFIG_ARCH_OMAP16XX || CONFIG_ARCH_OMAP2PLUS ))
• defined in arch/arm/plat-omap/Kconfig
• found in Linux kernels: 2.6.13–2.6.39, 3.0–3.9, 3.10-rc+HEAD

Help text

Select this option if you want to enable the OMAP 32KHz timer. This timer saves power compared to the OMAP_MPU_TIMER, and has support for no tick during idle. The 32KHz timer provides less intra-tick resolution than OMAP_MPU_TIMER. The 32KHz timer is currently only available for OMAP16XX, 24XX, 34XX and OMAP4/5.

On OMAP2PLUS this value is only used for HZ and CLOCK_TICK_RATE compile time calculation. The actual timer selection is done in the board file through the (DT_)MACHINE_START structure.

Hardware

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