i2c-3 smbus SMBus PIIX4 adapter port 0 at ff00 SMBus adapter i2c-1 i2c AMDGPU DM i2c hw bus 0 I2C adapter i2c-4 smbus SMBus PIIX4 adapter port 2 at ff00 SMBus adapter i2c-2 i2c AMDGPU DM aux hw bus 0 I2C adapter i2c-0 i2c Synopsys DesignWare I2C adapter I2C adapter i2c-5 smbus SMBus PIIX4 adapter port 1 at ff20 SMBus adapter