i2c-0 smbus SMBus I801 adapter at efa0 SMBus adapter i2c-1 i2c Radeon i2c bit bus 0x90 I2C adapter i2c-2 i2c Radeon i2c bit bus 0x91 I2C adapter i2c-3 i2c Radeon i2c bit bus 0x92 I2C adapter i2c-4 i2c Radeon i2c bit bus 0x93 I2C adapter i2c-5 i2c Radeon i2c bit bus 0x14 I2C adapter