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coreboot-kgpe-d16/Documentation/mainboard/lenovo/x1.md
Bill XIE 9cb2da45d8 mb/lenovo/x220: Add x1 as a variant 
ThinkPad X1 ( https://www.thinkwiki.org/wiki/Category:X1 ) is nearly a
clone of X220, with additional USB3 controller on pci-e (as i7 variant
of x220), and a powered ESATA port wired to ata4 (Linux' annotation).

Documentation added.

Tested:
- CPU i5-2520M
- Slotted DIMM 8GiB
- Camera
- Mini pci-e on wlan slot
- Msata on wwan slot
- On board SDHCI connected to pci-e
- USB3 controller connected to pci-e
- NVRAM options for North and South bridges
- S3
- TPM1 on LPC
- Linux 4.9.110-3 within Debian GNU/Linux stable, loaded from
  SeaBIOS, or Linux payload (Heads)

Not tested:
- Fingerprint reader on USB2
- Onboard USB2 interfaces (wlan slot, wwan slot)

Change-Id: Ibbc45f22c63b77ac95c188db825d0d7e2b03d2d1
Signed-off-by: Bill XIE <persmule@gmail.com>
Reviewed-on: https://review.coreboot.org/c/29434
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
2019-01-17 17:09:53 +00:00

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Lenovo X1

Flashing instructions

x1_flash_ic

You have to remove the keyboard in order to access the flash IC (the chip inside the red circle on the picture above), as it is under the wider cable (already detached from MB in the picture) connecting the keyboard to the mainboard.

The flash IC can be a SOIC-8 one or a WSON-8 one, and may be covered with a piece of insulation tape.

For more details have a look at T420 / T520 / X220 / T420s / W520 common and

:doc:`../../flash_tutorial/ext_power`

Steps to access the flash IC are described here X2xx series.