VLV_GTLC_PW_STATUS
pw_status = intel_uncore_read(uncore, VLV_GTLC_PW_STATUS);
i915_reg_t reg = VLV_GTLC_PW_STATUS;
if (!(intel_uncore_read(uncore, VLV_GTLC_PW_STATUS) & VLV_GTLC_ALLOWWAKEERR))
intel_uncore_write(uncore, VLV_GTLC_PW_STATUS, VLV_GTLC_ALLOWWAKEERR);