tree 21f553e20ef034c2094be8ac9717aabec5e92cd0
parent 0832be5b76911c22d81437e50ca278f9d7b41953
author Bin Meng <bmeng.cn@gmail.com> 1533893976 -0700
committer Bin Meng <bmeng.cn@gmail.com> 1534744369 +0800

x86: tsc: Try hardware calibration first

At present if TSC frequency is provided in the device tree, it takes
precedence over hardware calibration result. This swaps the order to
try hardware calibration first and uses device tree as last resort.

This can be helpful when a generic dts (eg: coreboot/efi payload) is
supposed to work on as many hardware as possible, including emulators
like QEMU where TSC hardware calibration sometimes fails.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>