37 lines · c
1// SPDX-License-Identifier: GPL-2.02/* Helper functions for Thinkpad LED control;3 * to be included from codec driver4 */5 6#if IS_ENABLED(CONFIG_THINKPAD_ACPI)7 8#include <linux/acpi.h>9#include <linux/leds.h>10 11static 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 18static 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 31static 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