amd_pmc_reg_read
val = amd_pmc_reg_read(pdev, pdev->cpu_info->scratch_reg);
value = amd_pmc_reg_read(dev, response);
value = amd_pmc_reg_read(dev, argument);
value = amd_pmc_reg_read(dev, message);
*data = amd_pmc_reg_read(dev, argument);