i2c-0 i2c AMDGPU DM i2c hw bus 0 I2C adapter i2c-1 i2c AMDGPU DM i2c hw bus 1 I2C adapter i2c-2 i2c AMDGPU DM i2c hw bus 2 I2C adapter i2c-3 i2c AMDGPU DM aux hw bus 0 I2C adapter i2c-4 smbus SMBus I801 adapter at f000 SMBus adapter