CONFIG_TIMER_ACPI (not configurable)

configname: CONFIG_TIMER_ACPI

Linux Kernel Configuration
└─>Device Drivers
└─>Clock Source drivers
└─>TIMER_ACPI
In linux kernel since version 4.2 (release Date: 2015-08-30)  

depends
NOT CONFIG_ARCH_USES_GETTIMEOFFSET

is depended by
CONFIG_ARM_ARCH_TIMER