[coreboot-gerrit] Change in coreboot[master]: soc/sifive/fu540: Add helper function to get tlclk frequency

[Jonathan Neuschäfer (Code Review)]

Jonathan Neuschäfer has posted comments on this change. ( https://review.coreboot.org/29335 )

Change subject: soc/sifive/fu540: Add helper function to get tlclk frequency
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Patch Set 1:

Philipp, how does TLCLKSEL work?

Wesley Terpstra said on the forum that it determines if tlclk is coreclk or coreclk/2, but how does software read it out?

(https://forums.sifive.com/t/hifive-unleashed-documentation-is-here/1152/9)