27 lines
1.0 KiB
Plaintext
27 lines
1.0 KiB
Plaintext
# Copyright (c) 2014-2015 Wind River Systems, Inc.
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# Copyright (c) 2016 Cadence Design Systems, Inc.
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# Copyright (c) 2019 Intel Corp.
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# SPDX-License-Identifier: Apache-2.0
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config ARM_ARCH_TIMER
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bool "ARM architected timer"
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depends on GIC
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select ARCH_HAS_CUSTOM_BUSY_WAIT
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select TICKLESS_CAPABLE
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select TIMER_HAS_64BIT_CYCLE_COUNTER
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help
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This module implements a kernel device driver for the ARM architected
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timer which provides per-cpu timers attached to a GIC to deliver its
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per-processor interrupts via PPIs.
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config ARM_ARCH_TIMER_ERRATUM_740657
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bool "ARM architected timer is affected by ARM erratum 740657"
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depends on ARM_ARCH_TIMER
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help
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This option indicates that the ARM architected timer as implemented
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in the target hardware is affected by the ARM erratum 740657 (comp.
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ARM Cortex-A9 processors Software Developers Errata Notice, ARM
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document ID032315) which leads to an additional, spurious interrupt
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indication upon every actual timer interrupt. This option activates
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the workaround for the erratum within the timer driver.
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