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| author | Charles Keepax <ckeepax@opensource.cirrus.com> | 2020-07-23 11:54:58 +0100 |
|---|---|---|
| committer | Lee Jones <lee.jones@linaro.org> | 2020-08-13 07:50:50 +0100 |
| commit | 114294d276279d6cda81f9c685452239ea89cdb8 (patch) | |
| tree | 8367f548a7691137cdf5f079244b648019c6cdda /include | |
| parent | 4ee1d9dc8073acd40f04e5fe3771a5dff978d077 (diff) | |
| download | lwn-114294d276279d6cda81f9c685452239ea89cdb8.tar.gz lwn-114294d276279d6cda81f9c685452239ea89cdb8.zip | |
mfd: mfd-core: Add mechanism for removal of a subset of children
Currently, the only way to remove MFD children is with a call to
mfd_remove_devices, which will remove all the children. Under
some circumstances it is useful to remove only a subset of the
child devices. For example if some additional clean up is required
between removal of certain child devices.
To accomplish this a level field is added to mfd_cell, the normal
mfd_remove_devices is modified to not remove devices that are set
to a higher level and a corresponding mfd_remove_devices_late
function is added to remove those children.
See further discussion at:
https://lore.kernel.org/lkml/20200616075834.GF2608702@dell/
Suggested-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/mfd/core.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/mfd/core.h b/include/linux/mfd/core.h index 6d68f44a26a1..4b35baa14d30 100644 --- a/include/linux/mfd/core.h +++ b/include/linux/mfd/core.h @@ -46,6 +46,9 @@ #define MFD_CELL_NAME(_name) \ MFD_CELL_ALL(_name, NULL, NULL, 0, 0, NULL, 0, false, NULL) +#define MFD_DEP_LEVEL_NORMAL 0 +#define MFD_DEP_LEVEL_HIGH 1 + struct irq_domain; struct property_entry; @@ -63,6 +66,7 @@ struct mfd_cell_acpi_match { struct mfd_cell { const char *name; int id; + int level; int (*enable)(struct platform_device *dev); int (*disable)(struct platform_device *dev); @@ -150,6 +154,7 @@ static inline int mfd_add_hotplug_devices(struct device *parent, } extern void mfd_remove_devices(struct device *parent); +extern void mfd_remove_devices_late(struct device *parent); extern int devm_mfd_add_devices(struct device *dev, int id, const struct mfd_cell *cells, int n_devs, |