diff options
Diffstat (limited to 'hdata')
| -rw-r--r-- | hdata/i2c.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/hdata/i2c.c b/hdata/i2c.c index 76b7e39..108584d 100644 --- a/hdata/i2c.c +++ b/hdata/i2c.c @@ -259,7 +259,22 @@ int parse_i2c_devs(const struct HDIF_common_hdr *hdr, int idata_index, purpose = be32_to_cpu(dev->purpose); type = map_type(dev->type); label = map_label(purpose); - if (type) { + + /* HACK: Hostboot doesn't export the correct type information + * for the DIMM SPD EEPROMs. This is a problem because SPD + * EEPROMs have a different wire protocol to the atmel,24XXXX + * series. The main difference being that SPD EEPROMs have an + * 8bit offset rather than a 16bit offset. This means that the + * driver will send 2 bytes when doing a random read, + * potentially overwriting part of the SPD information. + * + * To work around this we force the compat string to "spd" + */ + if (proc_gen == proc_gen_p9 && dev->type == 0x2 && + dev->i2cm_engine == 3) { + compat = "spd"; + name = "eeprom"; + } else if (type) { compat = type->compat; name = type->name; } else { |