src/ec/lenovo/h8/ssdt.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <console/console.h>
   4 #include <acpi/acpigen.h>
   5 #include <stdio.h>
   6 #include <string.h>
   7
   8 #include "h8.h"
   9 #include "chip.h"
  10
  11 static char *h8_dsdt_scope(const struct device *dev, const char *scope)
  12 {
  13         static char buf[DEVICE_PATH_MAX] = {};
  14         const char *path = acpi_device_path(dev);
  15
  16         memset(buf, 0, sizeof(buf));
  17         snprintf(buf, sizeof(buf) - 1, "%s.%s", path, scope);
  18
  19         return buf;
  20 }
  21
  22 /*
  23  * Generates EC SSDT.
  24  */
  25 void h8_ssdt_generator(const struct device *dev)
  26 {
  27         struct ec_lenovo_h8_config *conf = dev->chip_info;
  28
  29         if (!acpi_device_path(dev))
  30                 return;
  31
  32         printk(BIOS_INFO, "ACPI:    * H8\n");
  33
  34         /* Scope HKEY */
  35         acpigen_write_scope(h8_dsdt_scope(dev, "HKEY"));
  36
  37         /* Used by thinkpad_acpi */
  38         acpigen_write_name_byte("HBDC", h8_has_bdc(dev) ? ONE_OP : ZERO_OP);
  39         acpigen_write_name_byte("HWAN", h8_has_wwan(dev) ? ONE_OP : ZERO_OP);
  40         acpigen_write_name_byte("HKBL", (conf && conf->has_keyboard_backlight) ?
  41                                 ONE_OP : ZERO_OP);
  42         acpigen_write_name_byte("HUWB", (conf && conf->has_uwb) ?
  43                                 ONE_OP : ZERO_OP);
  44
  45         acpigen_pop_len(); /* Scope HKEY */
  46 }