VIAPM_PRO_SMBCTRL
l = pci_read_config(dev, VIAPM_PRO_SMBCTRL, 1);
pci_write_config(dev, VIAPM_PRO_SMBCTRL, l | 1, 1);
l = pci_read_config(dev, VIAPM_PRO_SMBCTRL, 1);
pci_write_config(dev, VIAPM_PRO_SMBCTRL, l | 0x80, 1);
l = pci_read_config(dev, VIAPM_PRO_SMBCTRL, 1);
pci_write_config(dev, VIAPM_PRO_SMBCTRL, l | 1, 1);