diff options
Diffstat (limited to 'include/linux/acpi.h')
| -rw-r--r-- | include/linux/acpi.h | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 84e7055bd904..51a96a8b9a89 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -787,6 +787,61 @@ int acpi_dev_prop_read(struct acpi_device *adev, const char *propname, struct fwnode_handle *acpi_get_next_subnode(struct device *dev, struct fwnode_handle *subnode); + +struct acpi_probe_entry; +typedef bool (*acpi_probe_entry_validate_subtbl)(struct acpi_subtable_header *, + struct acpi_probe_entry *); + +#define ACPI_TABLE_ID_LEN 5 + +/** + * struct acpi_probe_entry - boot-time probing entry + * @id: ACPI table name + * @type: Optional subtable type to match + * (if @id contains subtables) + * @subtable_valid: Optional callback to check the validity of + * the subtable + * @probe_table: Callback to the driver being probed when table + * match is successful + * @probe_subtbl: Callback to the driver being probed when table and + * subtable match (and optional callback is successful) + * @driver_data: Sideband data provided back to the driver + */ +struct acpi_probe_entry { + __u8 id[ACPI_TABLE_ID_LEN]; + __u8 type; + acpi_probe_entry_validate_subtbl subtable_valid; + union { + acpi_tbl_table_handler probe_table; + acpi_tbl_entry_handler probe_subtbl; + }; + kernel_ulong_t driver_data; +}; + +#define ACPI_DECLARE_PROBE_ENTRY(table, name, table_id, subtable, valid, data, fn) \ + static const struct acpi_probe_entry __acpi_probe_##name \ + __used __section(__##table##_acpi_probe_table) \ + = { \ + .id = table_id, \ + .type = subtable, \ + .subtable_valid = valid, \ + .probe_table = (acpi_tbl_table_handler)fn, \ + .driver_data = data, \ + } + +#define ACPI_PROBE_TABLE(name) __##name##_acpi_probe_table +#define ACPI_PROBE_TABLE_END(name) __##name##_acpi_probe_table_end + +int __acpi_probe_device_table(struct acpi_probe_entry *start, int nr); + +#define acpi_probe_device_table(t) \ + ({ \ + extern struct acpi_probe_entry ACPI_PROBE_TABLE(t), \ + ACPI_PROBE_TABLE_END(t); \ + __acpi_probe_device_table(&ACPI_PROBE_TABLE(t), \ + (&ACPI_PROBE_TABLE_END(t) - \ + &ACPI_PROBE_TABLE(t))); \ + }) #else static inline int acpi_dev_get_property(struct acpi_device *adev, const char *name, acpi_object_type type, @@ -845,6 +900,17 @@ static inline struct fwnode_handle *acpi_get_next_subnode(struct device *dev, { return NULL; } + +#define ACPI_DECLARE_PROBE_ENTRY(table, name, table_id, subtable, validate, data, fn) \ + static const void * __acpi_table_##name[] \ + __attribute__((unused)) \ + = { (void *) table_id, \ + (void *) subtable, \ + (void *) valid, \ + (void *) fn, \ + (void *) data } + +#define acpi_probe_device_table(t) ({ int __r = 0; __r;}) #endif #endif /*_LINUX_ACPI_H*/ |