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_PRE_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 */
37
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.