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authorCharles Keepax <ckeepax@opensource.cirrus.com>2020-07-23 11:54:58 +0100
committerLee Jones <lee.jones@linaro.org>2020-08-13 07:50:50 +0100
commit114294d276279d6cda81f9c685452239ea89cdb8 (patch)
tree8367f548a7691137cdf5f079244b648019c6cdda /include
parent4ee1d9dc8073acd40f04e5fe3771a5dff978d077 (diff)
downloadlinux-114294d276279d6cda81f9c685452239ea89cdb8.tar.bz2
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.h5
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,