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diff --git a/src/mainboard/lenovo/x200/blc.c b/src/mainboard/lenovo/x200/blc.c
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+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2017 arthur@aheymans.xyz
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <stdint.h>
+#include <commonlib/helpers.h>
+#include <northbridge/intel/gm45/gm45.h>
+
+static const struct blc_pwm_t blc_entries[] = {
+ {"LTD121EWVB", 165},
+ {"B121EW03 V6 ", 165},
+ /* datasheets: between 100 and 20k, typical 200 */
+ /* TESTED: works best at 400 */
+ {"B121EW09 V3 ", 400},
+ {"HV121WX4-120", 110}, /* Aftermarket AFFS lcd, works well at low pwm */
+ {"LTN121AT03001", 110},
+ {"LTN121AP03001", 750},
+ /* TODO: untested panels found on thinkwiki */
+ /* Generally CCFL runs best at lower PWM */
+ /* {"B121EW09 V2 ", 450}, */
+ /* {"N121IB-L05", 450}, */
+ {"LP121WX3-TLC1", 400}, /* TESTED to work best at this value */
+ /* {"LP121WX3-TLA1" 450}, */
+ /* {"B121EW03 V3 " 110}, */
+ /* {"LTN121AP02001" 110}, */
+};
+
+int get_blc_values(const struct blc_pwm_t **entries)
+{
+ *entries = blc_entries;
+ return ARRAY_SIZE(blc_entries);
+}