[L] Change in flashrom[master]: ch347_spi.c: Add initial support for the WCH CH347

[qianfan (Code Review)]

Attention is currently required from: Thomas Heijligen, Angel Pons, Anastasia Klimchuk, Nicholas Chin.

qianfan has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/70573 )

Change subject: ch347_spi.c: Add initial support for the WCH CH347
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Patch Set 3:

(1 comment)

Patchset:

PS3:
> Ah, I guess I should have checked Gerrit before I pushed my patch. Sorry about that. […]

WCH has a greate tool for CH347 named CH347Demo and you can get it from https://www.wch.cn/downloads/CH347EVT_ZIP.html
CH347Demo can change SPI mode, clock, bitorder and others properties independently. I had a usb sniffier tools, change one property and see what happens on the usb bus, it's easy figure out the structure.