O2_SD_TEST_REG
O2_SD_TEST_REG, &scratch_32);
O2_SD_TEST_REG, scratch_32);
ret = pci_read_config_dword(chip->pdev, O2_SD_TEST_REG, &scratch_32);
pci_write_config_dword(chip->pdev, O2_SD_TEST_REG, scratch_32);