src/mainboard/lenovo/x60/cstates.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <acpi/acpigen.h>
   4 #include <southbridge/intel/i82801gx/i82801gx.h>
   5
   6 #define MWAIT_RES(state, sub_state)                             \
   7         {                                                       \
   8                 .space_id = ACPI_ADDRESS_SPACE_FIXED,           \
   9                 .bit_width = ACPI_FFIXEDHW_VENDOR_INTEL,        \
  10                 .bit_offset = ACPI_FFIXEDHW_CLASS_MWAIT,        \
  11                 .access_size = ACPI_ACCESS_SIZE_UNDEFINED,      \
  12                 .addrl = (((state) << 4) | (sub_state)),        \
  13                 .addrh = 0,                                     \
  14         }
  15
  16 static const acpi_cstate_t cst_entries[] = {
  17         {
  18                 .ctype = 1,
  19                 .latency = 1,
  20                 .power = 1000,
  21                 .resource = MWAIT_RES(0, 0),
  22         },
  23         {
  24                 .ctype = 2,
  25                 .latency = 1,
  26                 .power = 500,
  27                 .resource = MWAIT_RES(1, 0),
  28         },
  29         {
  30                 .ctype = 3,
  31                 .latency = 17,
  32                 .power = 250,
  33                 .resource = MWAIT_RES(2, 0),
  34         },
  35 };
  36
  37 int get_cst_entries(const acpi_cstate_t **entries)
  38 {
  39         *entries = cst_entries;
  40         return ARRAY_SIZE(cst_entries);
  41 }