On 2024-05-30 20:34:43+0000, Paul Menzel wrote: > On several systems Linux logs: > > i2c i2c-0: Memory type 0x22 not supported yet, not instantiating SPD > > 1. Supermicro Super Server/X13SAE, BIOS 2.0 10/17/2022 > 2. Dell Inc. Precision 3660/0PRR48, BIOS 2.9.3 11/22/2023 > 3. Dell Inc. OptiPlex SFF Plus 7010/0YGWFV, BIOS 1.7.1 08/11/2023 > 4. Run `git grep 'emory type.*supported yet, not instantiating SPD'` in > the repository of dmesg reports for various computers collected by > Linux users at https://linux-hardware.org. [1] > > Add 0x22 and 0x23 as memory types for DDR5 according to section 7.18.2 > (Memory Device — Type), table 78 in *System Management BIOS (SMBIOS) > Reference Specification*, version 3.6.0 [2]. These use JEDEC JESD300-5 for > SPD, and, currently, no driver exists, so add a specific warning for this > case. There is a SPD5118 driver coming up, which will handle DDR5 chips [0]. [0] https://lore.kernel.org/lkml/20240529205204.81208-1-linux@xxxxxxxxxxxx/
