ideapad_hotkey_led.c

 1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * Ideapad helper functions for Lenovo Ideapad LED control,
 4 * It should be included from codec driver.
 5 */
 6
 7#if IS_ENABLED(CONFIG_IDEAPAD_LAPTOP)
 8
 9#include <linux/acpi.h>
10#include <linux/leds.h>
11
12static bool is_ideapad(struct hda_codec *codec)
13{
14	return (codec->core.subsystem_id >> 16 == 0x17aa) &&
15	       (acpi_dev_found("LHK2019") || acpi_dev_found("VPC2004"));
16}
17
18static void hda_fixup_ideapad_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_ideapad(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_IDEAPAD_LAPTOP */
30
31static void hda_fixup_ideapad_acpi(struct hda_codec *codec,
32				   const struct hda_fixup *fix, int action)
33{
34}
35
36#endif /* CONFIG_IDEAPAD_LAPTOP */