mmSMC_MSG_ARG_0
WREG32(mmSMC_MSG_ARG_0, parameter);
cgs_write_register(hwmgr->device, mmSMC_MSG_ARG_0, parameter);
cgs_write_register(hwmgr->device, mmSMC_MSG_ARG_0, parameter);
return cgs_read_register(hwmgr->device, mmSMC_MSG_ARG_0);