From 134c30761e9a1a7c9a89823976b9cbdce11b3fce Mon Sep 17 00:00:00 2001 From: Michael Bacarella Date: Mon, 3 Dec 2018 13:31:35 -0800 Subject: 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 Change-Id: I9046fa63dcd4d192836417efac68ca7587ac1c91 Signed-off-by: Michael Bacarella Reviewed-on: https://review.coreboot.org/c/30027 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Rudolph --- Documentation/mainboard/lenovo/t420.md | 13 +++++++++++-- Documentation/mainboard/lenovo/t420_chip_location.jpg | Bin 0 -> 316180 bytes 2 files changed, 11 insertions(+), 2 deletions(-) create mode 100644 Documentation/mainboard/lenovo/t420_chip_location.jpg diff --git a/Documentation/mainboard/lenovo/t420.md b/Documentation/mainboard/lenovo/t420.md index ff7a0a9238..6ebff0ed3e 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.jpg + +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.jpg b/Documentation/mainboard/lenovo/t420_chip_location.jpg new file mode 100644 index 0000000000..e38516503c Binary files /dev/null and b/Documentation/mainboard/lenovo/t420_chip_location.jpg differ -- cgit v1.2.3