diff options
| author | Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> | 2016-11-12 18:07:44 -0600 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2016-11-13 09:19:51 +0000 |
| commit | 3421894765a345c6919b22cdda606c2ba1aab2eb (patch) | |
| tree | 0a533d59caf4f229497efbfe49e8c9dc98809a99 /sound/soc/intel/common/sst-acpi.h | |
| parent | 8b4a133c6145a34618c770117b65b33f1aa993aa (diff) | |
ASoC: Intel: common: add ACPI package extraction utility
Add a new common routine to extract a package exposed by a
device indexed with the HID value. The functionality is
implemented without assumptions on the package type or
structure to allow for reuse. The caller is responsible for
defining the name and allocating structures to store the
results, ACPICA will complain in case of type mismatches
or buffer size issues.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/intel/common/sst-acpi.h')
| -rw-r--r-- | sound/soc/intel/common/sst-acpi.h | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/sound/soc/intel/common/sst-acpi.h b/sound/soc/intel/common/sst-acpi.h index 012742299dd5..214e000667ae 100644 --- a/sound/soc/intel/common/sst-acpi.h +++ b/sound/soc/intel/common/sst-acpi.h @@ -15,14 +15,29 @@ #include <linux/stddef.h> #include <linux/acpi.h> -/* translation fron HID to I2C name, needed for DAI codec_name */ +struct sst_acpi_package_context { + char *name; /* package name */ + int length; /* number of elements */ + struct acpi_buffer *format; + struct acpi_buffer *state; + bool data_valid; +}; + #if IS_ENABLED(CONFIG_ACPI) +/* translation fron HID to I2C name, needed for DAI codec_name */ const char *sst_acpi_find_name_from_hid(const u8 hid[ACPI_ID_LEN]); +bool sst_acpi_find_package_from_hid(const u8 hid[ACPI_ID_LEN], + struct sst_acpi_package_context *ctx); #else static inline const char *sst_acpi_find_name_from_hid(const u8 hid[ACPI_ID_LEN]) { return NULL; } +static inline bool sst_acpi_find_package_from_hid(const u8 hid[ACPI_ID_LEN], + struct sst_acpi_package_context *ctx) +{ + return false; +} #endif /* acpi match */ |