coreboot/src/mainboard/siemens
Werner Zeh 722c0b7b21 mb/siemens/mc_ehl: Enable write access for SPD EEPROM on mc_ehl1
The address space of possible SPD-EEPROMs 0x50..0x53 on the SMBus
interface is per default write-protected in FSP. This avoids that an
SPD-EEPROM on a DRAM module gets overwritten by the host.

On mc_ehl1, memory-down configuration is used and there is no SPD EEPROM
available. Nevertheless, there is a general purpose EEPROM on the same
address available which needs to stay writeable.

This patch disables the default-enabled write protect feature for the
SPD-EEPROM addresses just for mc_ehl1.

Test=Boot into Linux and make sure a write access into the EEPROM is
possible.

Change-Id: I6b0fcdbeb0dbf971cfdceb70d6f4845765a3bdb6
Signed-off-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79334
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jan Samek <jan.samek@siemens.com>
2023-11-30 15:03:33 +00:00
..
chili mb/*: Remove lapic from devicetree 2023-01-30 10:49:11 +00:00
fa_ehl mb/siemens: Move selects from Kconfig.name to Kconfig 2023-10-03 15:07:55 +00:00
mc_apl1 mb/siemens: Move selects from Kconfig.name to Kconfig 2023-10-03 15:07:55 +00:00
mc_ehl mb/siemens/mc_ehl: Enable write access for SPD EEPROM on mc_ehl1 2023-11-30 15:03:33 +00:00
Kconfig
Kconfig.name