diff options
Diffstat (limited to 'include/dm/uclass.h')
| -rw-r--r-- | include/dm/uclass.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/include/dm/uclass.h b/include/dm/uclass.h index d95683740c..6752d8ee0b 100644 --- a/include/dm/uclass.h +++ b/include/dm/uclass.h @@ -114,6 +114,37 @@ struct uclass_driver { #define UCLASS_DRIVER(__name) \ ll_entry_declare(struct uclass_driver, __name, uclass_driver) +/* + * These two macros DM_UCLASS_DRIVER_REF and DM_UCLASS_DRIVER_REF are only + * allowed in code generated by dtoc, because the ordering is important and if + * other instances creep in then they may mess up the ordering expected by dtoc. + * + * It is OK to use them with 'extern' though, since that does not actually + * add a new record to the linker_list. + */ + +/** + * DM_UCLASS_DRIVER_REF() - Get a reference to a uclass driver + * + * This is useful in data structures and code for referencing a uclass_driver at + * build time. Before this is used, an extern UCLASS_DRIVER() must have been + * declared. + * + * For example: + * + * extern UCLASS_DRIVER(clk); + * + * struct uclass_driver *drvs[] = { + * DM_UCLASS_DRIVER_REF(clk), + * }; + * + * @_name: Name of the uclass_driver. This must be a valid C identifier, used by + * the linker_list. + * @returns struct uclass_driver * for the uclass driver + */ +#define DM_UCLASS_DRIVER_REF(_name) \ + ll_entry_ref(struct uclass_driver, _name, uclass_driver) + /** * uclass_get_priv() - Get the private data for a uclass * |