PCH_R_HCFG_SET_I2CEN
val = PCH_R_HCFG_SET_I2CEN(val, PCH_R_HCFG_I2CEN_SMBUS);
val = PCH_R_HCFG_SET_I2CEN(val, 1);
val = PCH_R_HCFG_SET_I2CEN(val, 0);