It's often useful to look up a device that corresponds to a fwnode. So
add an API to do that irrespective of the bus on which the device has
been added to.
Signed-off-by: Saravana Kannan <saravanak@xxxxxxxxxx>
---
drivers/base/core.c | 7 +++++++
include/linux/fwnode.h | 2 ++
2 files changed, 9 insertions(+)
diff --git a/drivers/base/core.c b/drivers/base/core.c
index 2db62d98e395..510fabf8918c 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -2198,6 +2198,10 @@ int device_add(struct device *dev)
BUS_NOTIFY_ADD_DEVICE, dev);
kobject_uevent(&dev->kobj, KOBJ_ADD);
+
+ if (dev->fwnode && !dev->fwnode->dev)
+ dev->fwnode->dev = dev;
+
bus_probe_device(dev);
if (parent)
klist_add_tail(&dev->p->knode_parent,
@@ -2342,6 +2346,9 @@ void device_del(struct device *dev)
kill_device(dev);
device_unlock(dev);
+ if (dev->fwnode && dev->fwnode->dev == dev)
+ dev->fwnode->dev = NULL;
+
/* Notify clients of device removal. This call must come
* before dpm_sysfs_remove().
*/
diff --git a/include/linux/fwnode.h b/include/linux/fwnode.h
index ababd6bc82f3..d8c6d231d577 100644
--- a/include/linux/fwnode.h
+++ b/include/linux/fwnode.h
@@ -17,6 +17,7 @@ struct device;
struct fwnode_handle {
struct fwnode_handle *secondary;
const struct fwnode_operations *ops;
+ struct device *dev;
};
/**
@@ -123,5 +124,6 @@ struct fwnode_operations {
if (fwnode_has_op(fwnode, op)) \
(fwnode)->ops->op(fwnode, ## __VA_ARGS__); \
} while (false)
+#define get_dev_from_fwnode(fwnode) get_device((fwnode)->dev)
#endif
--
2.23.0.187.g17f5b7556c-goog
