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