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H A DKconfig3ba6a0f4f6a2381ad32930df6277930a3de577bc Tue Jan 06 14:14:14 UTC 2015 Bin Meng <bmeng.cn@gmail.com> x86: Allow a hardcoded TSC frequency provided by Kconfig

By default U-Boot automatically calibrates TSC running frequency via
MSR and PIT. The calibration may not work on every x86 processor, so
a new Kconfig option CONFIG_TSC_CALIBRATION_BYPASS is introduced to
allow bypassing the calibration and assign a hardcoded TSC frequency
CONFIG_TSC_FREQ_IN_MHZ.

Normally the bypass should be turned on in a simulation environment
like qemu.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>