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> No, flashrom uses the LPC device's PCI IDs. […]
TGL IDs in flashrom are LPC/eSPI DIDs. Also, see this comment in `enable_flash_pch100_or_c620`:
* The SPI PCI device is usually hidden (by hiding PCI vendor
* and device IDs). So we need a PCI access method that works
* even when the OS doesn't know the PCI device. We can't use
* this method globally since it would bring along other con-
* straints (e.g. on PCI domains, extended PCIe config space).
flashrom can run on any system, not just Intel systems. The internal programmer can't assume anything about the system it runs on, so it can't try to blindly access a PCI device that doesn't enumerate normally (who knows what that device could be). That's why flashrom uses the LPC/eSPI device ID to detect the chipset it's running on: the LPC/eSPI device is always visible (AFAIK it can't even be disabled), so it's possible to look at all the enumerated PCI devices to see if there's any VID/DID match. Only when the chipset is known can flashrom try accessing a potentially hidden PCI device (i.e. the SPI PCI device).
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