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| author | Corentin Labbe <clabbe@baylibre.com> | 2022-11-14 12:56:06 +0100 |
|---|---|---|
| committer | Wolfram Sang <wsa@kernel.org> | 2022-12-01 23:39:02 +0100 |
| commit | 3d50b95b50db36de945bfc34d4d94b7e11ee8fd9 (patch) | |
| tree | 0927f81ad65d31a4da347c1c9c56f1517b31bcf3 /drivers | |
| parent | Merge branch 'i2c/client_device_id_helper-immutable' into i2c/for-mergewindow (diff) | |
| download | linux-3d50b95b50db36de945bfc34d4d94b7e11ee8fd9.tar.xz linux-3d50b95b50db36de945bfc34d4d94b7e11ee8fd9.zip | |
i2c: smbus: add DDR support for SPD
On my x05 laptop I got:
Memory type 0x12 not supported yet, not instantiating SPD
Adding the 0x12 case lead to a successful instantiated SPD AT24 EEPROM.
i801_smbus 0000:00:1f.3: SMBus using polling
i2c i2c-6: 2/2 memory slots populated (from DMI)
at24 6-0050: 256 byte spd EEPROM, read-only
i2c i2c-6: Successfully instantiated SPD at 0x50
at24 6-0051: 256 byte spd EEPROM, read-only
And then, I decoded it successfully via decode-dimms.
Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/i2c/i2c-smbus.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/i2c/i2c-smbus.c b/drivers/i2c/i2c-smbus.c index 07c92c8495a3..c85710ed9548 100644 --- a/drivers/i2c/i2c-smbus.c +++ b/drivers/i2c/i2c-smbus.c @@ -361,9 +361,15 @@ void i2c_register_spd(struct i2c_adapter *adap) return; } + /* + * Memory types could be found at section 7.18.2 (Memory Device — Type), table 78 + * https://www.dmtf.org/sites/default/files/standards/documents/DSP0134_3.6.0.pdf + */ switch (common_mem_type) { + case 0x12: /* DDR */ case 0x13: /* DDR2 */ case 0x18: /* DDR3 */ + case 0x1B: /* LPDDR */ case 0x1C: /* LPDDR2 */ case 0x1D: /* LPDDR3 */ name = "spd"; |