diff options
Diffstat (limited to 'include/dm/uclass-internal.h')
-rw-r--r-- | include/dm/uclass-internal.h | 115 |
1 files changed, 88 insertions, 27 deletions
diff --git a/include/dm/uclass-internal.h b/include/dm/uclass-internal.h index f2f254a8259..9b685086671 100644 --- a/include/dm/uclass-internal.h +++ b/include/dm/uclass-internal.h @@ -11,12 +11,25 @@ #define _DM_UCLASS_INTERNAL_H /** + * uclass_get_device_tail() - handle the end of a get_device call + * + * This handles returning an error or probing a device as needed. + * + * @dev: Device that needs to be probed + * @ret: Error to return. If non-zero then the device is not probed + * @devp: Returns the value of 'dev' if there is no error + * @return ret, if non-zero, else the result of the device_probe() call + */ +int uclass_get_device_tail(struct udevice *dev, int ret, struct udevice **devp); + +/** * uclass_find_device() - Return n-th child of uclass * @id: Id number of the uclass * @index: Position of the child in uclass's list * #devp: Returns pointer to device, or NULL on error * - * The device is not prepared for use - this is an internal function + * The device is not prepared for use - this is an internal function. + * The function uclass_get_device_tail() can be used to probe the device. * * @return the uclass pointer of a child at the given index or * return NULL on error. @@ -24,6 +37,68 @@ int uclass_find_device(enum uclass_id id, int index, struct udevice **devp); /** + * uclass_find_first_device() - Return the first device in a uclass + * @id: Id number of the uclass + * #devp: Returns pointer to device, or NULL on error + * + * The device is not prepared for use - this is an internal function. + * The function uclass_get_device_tail() can be used to probe the device. + * + * @return 0 if OK (found or not found), -1 on error + */ +int uclass_find_first_device(enum uclass_id id, struct udevice **devp); + +/** + * uclass_find_next_device() - Return the next device in a uclass + * @devp: On entry, pointer to device to lookup. On exit, returns pointer + * to the next device in the same uclass, or NULL if none + * + * The device is not prepared for use - this is an internal function. + * The function uclass_get_device_tail() can be used to probe the device. + * + * @return 0 if OK (found or not found), -1 on error + */ +int uclass_find_next_device(struct udevice **devp); + +/** + * uclass_find_device_by_name() - Find uclass device based on ID and name + * + * This searches for a device with the exactly given name. + * + * The device is NOT probed, it is merely returned. + * + * @id: ID to look up + * @name: name of a device to find + * @devp: Returns pointer to device (the first one with the name) + * @return 0 if OK, -ve on error + */ +int uclass_find_device_by_name(enum uclass_id id, const char *name, + struct udevice **devp); + +/** + * uclass_find_device_by_seq() - Find uclass device based on ID and sequence + * + * This searches for a device with the given seq or req_seq. + * + * For seq, if an active device has this sequence it will be returned. + * If there is no such device then this will return -ENODEV. + * + * For req_seq, if a device (whether activated or not) has this req_seq + * value, that device will be returned. This is a strong indication that + * the device will receive that sequence when activated. + * + * The device is NOT probed, it is merely returned. + * + * @id: ID to look up + * @seq_or_req_seq: Sequence number to find (0=first) + * @find_req_seq: true to find req_seq, false to find seq + * @devp: Returns pointer to device (there is only one per for each seq) + * @return 0 if OK, -ve on error + */ +int uclass_find_device_by_seq(enum uclass_id id, int seq_or_req_seq, + bool find_req_seq, struct udevice **devp); + +/** * uclass_bind_device() - Associate device with a uclass * * Connect the device into uclass's list of devices. @@ -41,18 +116,23 @@ int uclass_bind_device(struct udevice *dev); * @dev: Pointer to the device * #return 0 on success, -ve on error */ +#ifdef CONFIG_DM_DEVICE_REMOVE int uclass_unbind_device(struct udevice *dev); +#else +static inline int uclass_unbind_device(struct udevice *dev) { return 0; } +#endif /** - * uclass_pre_probe_child() - Deal with a child that is about to be probed + * uclass_pre_probe_device() - Deal with a device that is about to be probed * * Perform any pre-processing that is needed by the uclass before it can be - * probed. + * probed. This includes the uclass' pre-probe() method and the parent + * uclass' child_pre_probe() method. * * @dev: Pointer to the device * #return 0 on success, -ve on error */ -int uclass_pre_probe_child(struct udevice *dev); +int uclass_pre_probe_device(struct udevice *dev); /** * uclass_post_probe_device() - Deal with a device that has just been probed @@ -73,7 +153,11 @@ int uclass_post_probe_device(struct udevice *dev); * @dev: Pointer to the device * #return 0 on success, -ve on error */ +#ifdef CONFIG_DM_DEVICE_REMOVE int uclass_pre_remove_device(struct udevice *dev); +#else +static inline int uclass_pre_remove_device(struct udevice *dev) { return 0; } +#endif /** * uclass_find() - Find uclass by its id @@ -93,27 +177,4 @@ struct uclass *uclass_find(enum uclass_id key); */ int uclass_destroy(struct uclass *uc); -/** - * uclass_find_device_by_seq() - Find uclass device based on ID and sequence - * - * This searches for a device with the given seq or req_seq. - * - * For seq, if an active device has this sequence it will be returned. - * If there is no such device then this will return -ENODEV. - * - * For req_seq, if a device (whether activated or not) has this req_seq - * value, that device will be returned. This is a strong indication that - * the device will receive that sequence when activated. - * - * The device is NOT probed, it is merely returned. - * - * @id: ID to look up - * @seq_or_req_seq: Sequence number to find (0=first) - * @find_req_seq: true to find req_seq, false to find seq - * @devp: Returns pointer to device (there is only one per for each seq) - * @return 0 if OK, -ve on error - */ -int uclass_find_device_by_seq(enum uclass_id id, int seq_or_req_seq, - bool find_req_seq, struct udevice **devp); - #endif |