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-rw-r--r--include/linux/acpi.h66
1 files changed, 66 insertions, 0 deletions
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 865d948c60e6..815f5f62513f 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -773,6 +773,61 @@ 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,
@@ -831,6 +886,17 @@ 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*/

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