f9e10f26ba
Replace xx30 with Ivy_Bridge and xx20 with Sandy_Bridge. Also add a note that the Ivy_Bridge tutorial doesn't covert T430s and T431s. Change-Id: I0b65bca83195ec22cc139130e7cb6183c0972484 Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/38929 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Peter Lemenkov <lemenkov@gmail.com> Reviewed-by: Patrick Georgi <pgeorgi@google.com>
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Lenovo T420
Flashing instructions
The flash IC is located at the bottom center of the mainboard. Sadly, access to the IC is blocked by the magnesum frame, so you need to disassemble the entire laptop and remove the mainboard.
Below is a picture of IC on the mainboard, with the pinouts labeled.
The chip will either be a Macronix MX25L6404E (shown above) or a Winbond W25Q64CVSIG. Do not rely on dots painted in the corner of the chip (such as the blue dot pictured) to orient the pins!
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 T4xx series.