diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/dm/device-internal.h | 10 | ||||
| -rw-r--r-- | include/dm/device.h | 10 |
2 files changed, 16 insertions, 4 deletions
diff --git a/include/dm/device-internal.h b/include/dm/device-internal.h index b513b6861a6..39406c3f352 100644 --- a/include/dm/device-internal.h +++ b/include/dm/device-internal.h @@ -123,7 +123,8 @@ int device_probe(struct udevice *dev); * * @dev: Pointer to device to remove * @flags: Flags for selective device removal (DM_REMOVE_...) - * @return 0 if OK, -EKEYREJECTED if not removed due to flags, other -ve on + * @return 0 if OK, -EKEYREJECTED if not removed due to flags, -EPROBE_DEFER if + * this is a vital device and flags is DM_REMOVE_NON_VITAL, other -ve on * error (such an error here is normally a very bad thing) */ #if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE) @@ -178,12 +179,15 @@ static inline int device_chld_unbind(struct udevice *dev, struct driver *drv) * This continues through all children recursively stopping part-way through if * an error occurs. Return values of -EKEYREJECTED are ignored and processing * continues, since they just indicate that the child did not elect to be - * removed based on the value of @flags. + * removed based on the value of @flags. Return values of -EPROBE_DEFER cause + * processing of other children to continue, but the function will return + * -EPROBE_DEFER. * * @dev: The device whose children are to be removed * @drv: The targeted driver * @flags: Flag, if this functions is called in the pre-OS stage - * @return 0 on success, -ve on error + * @return 0 on success, -EPROBE_DEFER if any child failed to remove, other + * -ve on error */ #if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE) int device_chld_remove(struct udevice *dev, struct driver *drv, diff --git a/include/dm/device.h b/include/dm/device.h index 204441fd234..28533ce0b6d 100644 --- a/include/dm/device.h +++ b/include/dm/device.h @@ -74,6 +74,13 @@ struct driver_info; #define DM_FLAG_LEAVE_PD_ON (1 << 13) /* + * Device is vital to the operation of other devices. It is possible to remove + * removed this device after all regular devices are removed. This is useful + * e.g. for clock, which need to be active during the device-removal phase. + */ +#define DM_FLAG_VITAL (1 << 14) + +/* * One or multiple of these flags are passed to device_remove() so that * a selective device removal as specified by the remove-stage and the * driver flags can be done. @@ -91,7 +98,8 @@ enum { /* Remove devices which need some final OS preparation steps */ DM_REMOVE_OS_PREPARE = DM_FLAG_OS_PREPARE, - /* Add more use cases here */ + /* Remove only devices that are not marked vital */ + DM_REMOVE_NON_VITAL = DM_FLAG_VITAL, /* Remove devices with any active flag */ DM_REMOVE_ACTIVE_ALL = DM_REMOVE_ACTIVE_DMA | DM_REMOVE_OS_PREPARE, |