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dm: core: Add a flag for power domain control on device removal

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In various cases a power domain must stay enabled after device
removal when booting OS (i.e. serial debug console or display).
Add a flag to selectively skip switching off a power domain.

Fixes: 52edfed65d ("dm: core: device: switch off power domain after device removal")
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Tested-by: Guillaume La Roque <glaroque@baylibre.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Anatolij Gustschin 2020-02-17 12:36:43 +01:00 committed by Simon Glass
parent 8aad16916d
commit 5349e255ff
2 changed files with 9 additions and 2 deletions
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5
drivers/core/device-remove.c
View File

@ -194,8 +194,9 @@ int device_remove(struct udevice *dev, uint flags)
}
}
if (!(drv->flags & DM_FLAG_DEFAULT_PD_CTRL_OFF) &&
(dev != gd->cur_serial_dev))
if (!(drv->flags &
(DM_FLAG_DEFAULT_PD_CTRL_OFF | DM_FLAG_REMOVE_WITH_PD_ON)) &&
dev != gd->cur_serial_dev)
dev_power_domain_off(dev);
if (flags_remove(flags, drv->flags)) {

6
include/dm/device.h
View File

@ -67,6 +67,12 @@ struct driver_info;
/* Driver platdata has been read. Cleared when the device is removed */
#define DM_FLAG_PLATDATA_VALID (1 << 12)
/*
* Device is removed without switching off its power domain. This might
* be required, i. e. for serial console (debug) output when booting OS.
*/
#define DM_FLAG_REMOVE_WITH_PD_ON (1 << 13)
/*
* 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