diff options
| author |   Jean Delvare <khali@linux-fr.org> | 2008-07-14 22:38:29 +0200 |
|---|---|---|
| committer |   Jean Delvare <khali@mahadeva.delvare> | 2008-07-14 22:38:29 +0200 |
| commit | d4653bf946a5856a17342cd47c47d10b16b1cc22 (patch) | |
| tree | 5f794e0e821d08e7f7bff06399aac9212fc47c76 /drivers/i2c | |
| parent | i2c: Let bus drivers add SPD to their class (diff) | |
| download | linux-dev-d4653bf946a5856a17342cd47c47d10b16b1cc22.tar.xz linux-dev-d4653bf946a5856a17342cd47c47d10b16b1cc22.zip | |
i2c/eeprom: Only probe buses with DDC or SPD class
The eeprom driver shouldn't probe i2c buses which don't want to be
probed.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
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) |