SINF_AC_CUR_BRIGHT
pcc->backlight->props.brightness = pcc->sinf[SINF_AC_CUR_BRIGHT];
pcc->ac_brightness = pcc->sinf[SINF_AC_CUR_BRIGHT];
return pcc->sinf[SINF_AC_CUR_BRIGHT];
rc = acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, bright);
return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_AC_CUR_BRIGHT]);
acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, val);
acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, pcc->ac_brightness);