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CONFIG_XTENSA_CALIBRATE_CCOUNT: Auto calibration of the CPU clock rate
General informations
The Linux kernel configuration item CONFIG_XTENSA_CALIBRATE_CCOUNT has multiple definitions:
arch/xtensa/Kconfig
The configuration item CONFIG_XTENSA_CALIBRATE_CCOUNT:
- prompt:
- type: bool
- depends on:
(none) - defined in arch/xtensa/Kconfig
- found in Linux kernels: 2.6.30–2.6.39, 3.0–3.9, 3.10-rc+HEAD
Help text
On some platforms (XT2000, for example), the CPU clock rate can vary. The frequency can be determined, however, by measuring against a well known, fixed frequency, such as an UART oscillator.
Auto calibration of the CPU clock rate found in arch/xtensa/Kconfig
The configuration item CONFIG_XTENSA_CALIBRATE_CCOUNT:
- prompt: Auto calibration of the CPU clock rate
- type: bool
- depends on:
(none) - defined in arch/xtensa/Kconfig
- found in Linux kernels: 2.6.13–2.6.29
Help text
On some platforms (XT2000, for example), the CPU clock rate can vary. The frequency can be determined, however, by measuring against a well known, fixed frequency, such as an UART oscillator.
Hardware
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