src/mainboard/lenovo/t400/blc.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <commonlib/helpers.h>
   4 #include <northbridge/intel/gm45/gm45.h>
   5
   6 /*
   7  * This contains a list of panel IDs and a known well working
   8  * backlight PWM frequency.
   9  */
  10 static const struct blc_pwm_t blc_entries[] = {
  11         /* Vendor BIOS seems to intend to set PWM freq at 220Hz */
  12         /* T400 */
  13         {"B141EW04 V7 ", 110},
  14         {"B141EW05 V3 ", 450},
  15         {"LP141WX3-TLR1", 110},
  16         {"LP141WX5-TLP2", 450},
  17         {"LTN141AT12401", 450},
  18         {"LTN141W1-L05", 110},
  19         {"LTN141WD-L05", 110},
  20         /* T500 */
  21         {"LP154W02-TL06", 110},
  22         {"LTN154P2-L05", 110},
  23         {"LTN154P3-L02", 110},
  24         {"LTN154X3-L02", 110},
  25         {"LTN154U2-L05", 110},
  26         /* R500 */
  27         {"154WX5-TLB2", 220},
  28 };
  29
  30 int get_blc_values(const struct blc_pwm_t **entries)
  31 {
  32         *entries = blc_entries;
  33         return ARRAY_SIZE(blc_entries);
  34 }