diff options
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/chips/eeprom.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/i2c/chips/eeprom.c b/drivers/i2c/chips/eeprom.c index 7dee001e5133..213a9f98decc 100644 --- a/drivers/i2c/chips/eeprom.c +++ b/drivers/i2c/chips/eeprom.c @@ -159,6 +159,8 @@ static struct bin_attribute eeprom_attr = { static int eeprom_attach_adapter(struct i2c_adapter *adapter) { + if (!(adapter->class & (I2C_CLASS_DDC | I2C_CLASS_SPD))) + return 0; return i2c_probe(adapter, &addr_data, eeprom_detect); } @@ -169,6 +171,12 @@ static int eeprom_detect(struct i2c_adapter *adapter, int address, int kind) struct eeprom_data *data; int err = 0; + /* EDID EEPROMs are often 24C00 EEPROMs, which answer to all + addresses 0x50-0x57, but we only care about 0x50. So decline + attaching to addresses >= 0x51 on DDC buses */ + if (!(adapter->class & I2C_CLASS_SPD) && address >= 0x51) + goto exit; + /* There are three ways we can read the EEPROM data: (1) I2C block reads (faster, but unsupported by most adapters) (2) Consecutive byte reads (100% overhead) |