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dm: core: Add dm_remove_devices_flags() and hook it into device_remove()

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The new function dm_remove_devices_flags() is intented for driver specific
last-stage cleanup operations before the OS is started. This patch adds
this functionality and hooks it into the common device_remove()
function.

Drivers wanting to use this feature for some last-stage removal calls,
need to add one of the DM_REMOVE_xx flags to their driver .flags.

Signed-off-by: Stefan Roese <sr@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Stefan Roese 2017-03-27 10:58:53 +02:00 • committed by Simon Glass
parent 706865afe5
commit bc85aa4030
3 changed files with 38 additions and 4 deletions
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17
drivers/core/device-remove.c
View file

@ -174,7 +174,13 @@ int device_remove(struct udevice *dev, uint flags)
if (ret) if (ret)
goto err; goto err;
if (drv->remove) { /*
* Remove the device if called with the "normal" remove flag set,
* or if the remove flag matches any of the drivers remove flags
*/
if (drv->remove &&
((flags & DM_REMOVE_NORMAL) ||
(flags & (drv->flags & DM_FLAG_ACTIVE_DMA)))) {
ret = drv->remove(dev); ret = drv->remove(dev);
if (ret) if (ret)
goto err_remove; goto err_remove;
@ -188,10 +194,13 @@ int device_remove(struct udevice *dev, uint flags)
} }
} }
device_free(dev); if ((flags & DM_REMOVE_NORMAL) ||
(flags & (drv->flags & DM_FLAG_ACTIVE_DMA))) {
device_free(dev);
dev->seq = -1; dev->seq = -1;
dev->flags &= ~DM_FLAG_ACTIVATED; dev->flags &= ~DM_FLAG_ACTIVATED;
}
return ret; return ret;

9
drivers/core/root.c
View file

@ -184,6 +184,15 @@ int dm_uninit(void)
return 0; return 0;
} }
#if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
int dm_remove_devices_flags(uint flags)
{
device_remove(dm_root(), flags);
return 0;
}
#endif
int dm_scan_platdata(bool pre_reloc_only) int dm_scan_platdata(bool pre_reloc_only)
{ {
int ret; int ret;

16
include/dm/root.h
View file

@ -115,4 +115,20 @@ int dm_init(void);
*/ */
int dm_uninit(void); int dm_uninit(void);
#if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
/**
* dm_remove_devices_flags - Call remove function of all drivers with
* specific removal flags set to selectively
* remove drivers
*
* All devices with the matching flags set will be removed
*
* @flags: Flags for selective device removal
* @return 0 if OK, -ve on error
*/
int dm_remove_devices_flags(uint flags);
#else
static inline int dm_remove_devices_flags(uint flags) { return 0; }
#endif
#endif #endif