sound/pci/hda/thinkpad_helper.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Helper functions for Thinkpad LED control;
   3  * to be included from codec driver
   4  */
   5
   6 #if IS_ENABLED(CONFIG_THINKPAD_ACPI)
   7
   8 #include <linux/acpi.h>
   9 #include <linux/leds.h>
  10
  11 static bool is_thinkpad(struct hda_codec *codec)
  12 {
  13         return (codec->core.subsystem_id >> 16 == 0x17aa) &&
  14                (acpi_dev_found("LEN0068") || acpi_dev_found("LEN0268") ||
  15                 acpi_dev_found("IBM0068"));
  16 }
  17
  18 static void hda_fixup_thinkpad_acpi(struct hda_codec *codec,
  19                                     const struct hda_fixup *fix, int action)
  20 {
  21         if (action == HDA_FIXUP_ACT_PROBE) {
  22                 if (!is_thinkpad(codec))
  23                         return;
  24                 snd_hda_gen_add_mute_led_cdev(codec, NULL);
  25                 snd_hda_gen_add_micmute_led_cdev(codec, NULL);
  26         }
  27 }
  28
  29 #else /* CONFIG_THINKPAD_ACPI */
  30
  31 static void hda_fixup_thinkpad_acpi(struct hda_codec *codec,
  32                                     const struct hda_fixup *fix, int action)
  33 {
  34 }
  35
  36 #endif /* CONFIG_THINKPAD_ACPI */