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dm: core: Add a way to skip powering down power domains

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When removing a device the power domains it uses are generally powered
off. But when we are trying to unbind all devices (e.g. for running tests)
we don't want to probe a device in the 'remove' path.

Add a new flag to skip this power-down step.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2020-03-28 14:03:48 -06:00
parent 8474da946f
commit ced1080489
3 changed files with 10 additions and 6 deletions
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3
drivers/core/device-remove.c
View file

@ -198,7 +198,8 @@ int device_remove(struct udevice *dev, uint flags)
}
}
if (!(drv->flags &
if (!(flags & DM_REMOVE_NO_PD) &&
!(drv->flags &
(DM_FLAG_DEFAULT_PD_CTRL_OFF | DM_FLAG_REMOVE_WITH_PD_ON)) &&
dev != gd->cur_serial_dev)
dev_power_domain_off(dev);

2
drivers/core/uclass.c
View file

@ -118,7 +118,7 @@ int uclass_destroy(struct uclass *uc)
while (!list_empty(&uc->dev_head)) {
dev = list_first_entry(&uc->dev_head, struct udevice,
uclass_node);
ret = device_remove(dev, DM_REMOVE_NORMAL);
ret = device_remove(dev, DM_REMOVE_NORMAL | DM_REMOVE_NO_PD);
if (ret)
return log_msg_ret("remove", ret);
ret = device_unbind(dev);

11
include/dm/device.h
View file

@ -80,18 +80,21 @@ struct driver_info;
*/
enum {
/* Normal remove, remove all devices */
DM_REMOVE_NORMAL = 1 << 0,
DM_REMOVE_NORMAL = 1 << 0,
/* Remove devices with active DMA */
DM_REMOVE_ACTIVE_DMA = DM_FLAG_ACTIVE_DMA,
DM_REMOVE_ACTIVE_DMA = DM_FLAG_ACTIVE_DMA,
/* Remove devices which need some final OS preparation steps */
DM_REMOVE_OS_PREPARE = DM_FLAG_OS_PREPARE,
DM_REMOVE_OS_PREPARE = DM_FLAG_OS_PREPARE,
/* Add more use cases here */
/* Remove devices with any active flag */
DM_REMOVE_ACTIVE_ALL = DM_REMOVE_ACTIVE_DMA | DM_REMOVE_OS_PREPARE,
DM_REMOVE_ACTIVE_ALL = DM_REMOVE_ACTIVE_DMA | DM_REMOVE_OS_PREPARE,
/* Don't power down any attached power domains */
DM_REMOVE_NO_PD = 1 << 1,
};
/**