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 
is_thinkpad(struct hda_codec * codec)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 
hda_fixup_thinkpad_acpi(struct hda_codec * codec,const struct hda_fixup * fix,int action)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 
hda_fixup_thinkpad_acpi(struct hda_codec * codec,const struct hda_fixup * fix,int action)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