diff options
Diffstat (limited to 'sound/pci/hda/thinkpad_helper.c')
| -rw-r--r-- | sound/pci/hda/thinkpad_helper.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/sound/pci/hda/thinkpad_helper.c b/sound/pci/hda/thinkpad_helper.c new file mode 100644 index 000000000..de4d8deed --- /dev/null +++ b/sound/pci/hda/thinkpad_helper.c @@ -0,0 +1,36 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Helper functions for Thinkpad LED control; + * to be included from codec driver + */ + +#if IS_ENABLED(CONFIG_THINKPAD_ACPI) + +#include <linux/acpi.h> +#include <linux/leds.h> + +static bool is_thinkpad(struct hda_codec *codec) +{ + return (codec->core.subsystem_id >> 16 == 0x17aa) && + (acpi_dev_found("LEN0068") || acpi_dev_found("LEN0268") || + acpi_dev_found("IBM0068")); +} + +static void hda_fixup_thinkpad_acpi(struct hda_codec *codec, + const struct hda_fixup *fix, int action) +{ + if (action == HDA_FIXUP_ACT_PRE_PROBE) { + if (!is_thinkpad(codec)) + return; + snd_hda_gen_add_mute_led_cdev(codec, NULL); + snd_hda_gen_add_micmute_led_cdev(codec, NULL); + } +} + +#else /* CONFIG_THINKPAD_ACPI */ + +static void hda_fixup_thinkpad_acpi(struct hda_codec *codec, + const struct hda_fixup *fix, int action) +{ +} + +#endif /* CONFIG_THINKPAD_ACPI */ |