[coreboot-gerrit] Change in ...coreboot[master]: Documentation/mainboard/lenovo/t420.md: add pic of chip

[Michael Bacarella (Code Review)]

Michael Bacarella has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/30027


Change subject: Documentation/mainboard/lenovo/t420.md: add pic of chip
......................................................................

Documentation/mainboard/lenovo/t420.md: add pic of chip

Provide pic of the flash IC with pinouts labeled, as well
as additional text about the chip.

Signed-off-by: Michael Bacarella <michael.bacarella at gmail.com>
Change-Id: I9046fa63dcd4d192836417efac68ca7587ac1c91
---
M Documentation/mainboard/lenovo/t420.md
A Documentation/mainboard/lenovo/t420_chip_location.png
2 files changed, 11 insertions(+), 2 deletions(-)



  git pull ssh://review.coreboot.org:29418/coreboot refs/changes/27/30027/1

diff --git a/Documentation/mainboard/lenovo/t420.md b/Documentation/mainboard/lenovo/t420.md
index ff7a0a9..9516a4c 100644
--- a/Documentation/mainboard/lenovo/t420.md
+++ b/Documentation/mainboard/lenovo/t420.md
@@ -1,8 +1,17 @@
 # Lenovo T420
 
 ## Flashing instructions
-You have to disassemble the whole device, as the flash IC is on the bottom
-of the mainboard.
+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.
+
+[t420_chip_location]: t420_chip_location.png
+
+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
 
diff --git a/Documentation/mainboard/lenovo/t420_chip_location.png b/Documentation/mainboard/lenovo/t420_chip_location.png
new file mode 100644
index 0000000..b9172ac
--- /dev/null
+++ b/Documentation/mainboard/lenovo/t420_chip_location.png
Binary files differ

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Gerrit-Project: coreboot
Gerrit-Branch: master
Gerrit-Change-Id: I9046fa63dcd4d192836417efac68ca7587ac1c91
Gerrit-Change-Number: 30027
Gerrit-PatchSet: 1
Gerrit-Owner: Michael Bacarella <michael.bacarella at gmail.com>
Gerrit-MessageType: newchange
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